Merge branch 'master' into osu-target-mod

FodyWeavers.xml

@@ -1,3 +1,3 @@
 <Weavers xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="FodyWeavers.xsd">
-  <Realm />
+  <Realm DisableAnalytics="true" />
 </Weavers>

osu.Android.props

@@ -52,7 +52,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="ppy.osu.Game.Resources" Version="2021.618.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2021.622.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2021.630.0" />
   </ItemGroup>
   <ItemGroup Label="Transitive Dependencies">
     <!-- Realm needs to be directly referenced in all Xamarin projects, as it will not pull in its transitive dependencies otherwise. -->

osu.Game.Rulesets.Mania/ManiaSettingsSubsection.cs

@@ -3,6 +3,7 @@
 
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
+using osu.Framework.Localisation;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Overlays.Settings;
 using osu.Game.Rulesets.Mania.Configuration;
@@ -47,7 +48,7 @@ namespace osu.Game.Rulesets.Mania
 
         private class TimeSlider : OsuSliderBar<double>
         {
-            public override string TooltipText => Current.Value.ToString("N0") + "ms";
+            public override LocalisableString TooltipText => Current.Value.ToString(@"N0") + "ms";
         }
     }
 }

osu.Game.Rulesets.Osu.Tests/TestSceneSliderSnaking.cs

@@ -37,11 +37,13 @@ namespace osu.Game.Rulesets.Osu.Tests
         private readonly BindableBool snakingIn = new BindableBool();
         private readonly BindableBool snakingOut = new BindableBool();
 
+        private IBeatmap beatmap;
+
         private const double duration_of_span = 3605;
         private const double fade_in_modifier = -1200;
 
         protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap, Storyboard storyboard = null)
-            => new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
+            => new ClockBackedTestWorkingBeatmap(this.beatmap = beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
 
         [BackgroundDependencyLoader]
         private void load(RulesetConfigCache configCache)
@@ -51,8 +53,16 @@ namespace osu.Game.Rulesets.Osu.Tests
             config.BindWith(OsuRulesetSetting.SnakingOutSliders, snakingOut);
         }
 
+        private Slider slider;
         private DrawableSlider drawableSlider;
 
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            slider = null;
+            drawableSlider = null;
+        });
+
         [SetUpSteps]
         public override void SetUpSteps()
         {
@@ -67,21 +77,19 @@ namespace osu.Game.Rulesets.Osu.Tests
             base.SetUpSteps();
             AddUntilStep("wait for track to start running", () => Beatmap.Value.Track.IsRunning);
 
-            double startTime = hitObjects[sliderIndex].StartTime;
-            addSeekStep(startTime);
-            retrieveDrawableSlider((Slider)hitObjects[sliderIndex]);
+            retrieveSlider(sliderIndex);
             setSnaking(true);
 
-            ensureSnakingIn(startTime + fade_in_modifier);
+            addEnsureSnakingInSteps(() => slider.StartTime + fade_in_modifier);
 
             for (int i = 0; i < sliderIndex; i++)
             {
                 // non-final repeats should not snake out
-                ensureNoSnakingOut(startTime, i);
+                addEnsureNoSnakingOutStep(() => slider.StartTime, i);
             }
 
             // final repeat should snake out
-            ensureSnakingOut(startTime, sliderIndex);
+            addEnsureSnakingOutSteps(() => slider.StartTime, sliderIndex);
         }
 
         [TestCase(0)]
@@ -93,17 +101,15 @@ namespace osu.Game.Rulesets.Osu.Tests
             base.SetUpSteps();
             AddUntilStep("wait for track to start running", () => Beatmap.Value.Track.IsRunning);
 
-            double startTime = hitObjects[sliderIndex].StartTime;
-            addSeekStep(startTime);
-            retrieveDrawableSlider((Slider)hitObjects[sliderIndex]);
+            retrieveSlider(sliderIndex);
             setSnaking(false);
 
-            ensureNoSnakingIn(startTime + fade_in_modifier);
+            addEnsureNoSnakingInSteps(() => slider.StartTime + fade_in_modifier);
 
             for (int i = 0; i <= sliderIndex; i++)
             {
                 // no snaking out ever, including final repeat
-                ensureNoSnakingOut(startTime, i);
+                addEnsureNoSnakingOutStep(() => slider.StartTime, i);
             }
         }
 
@@ -116,7 +122,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             // repeat might have a chance to update its position depending on where in the frame its hit,
             // so some leniency is allowed here instead of checking strict equality
-            checkPositionChange(16600, sliderRepeat, positionAlmostSame);
+            addCheckPositionChangeSteps(() => 16600, getSliderRepeat, positionAlmostSame);
         }
 
         [Test]
@@ -126,38 +132,41 @@ namespace osu.Game.Rulesets.Osu.Tests
             setSnaking(true);
             base.SetUpSteps();
 
-            checkPositionChange(16600, sliderRepeat, positionDecreased);
+            addCheckPositionChangeSteps(() => 16600, getSliderRepeat, positionDecreased);
         }
 
-        private void retrieveDrawableSlider(Slider slider) => AddUntilStep($"retrieve slider @ {slider.StartTime}", () =>
-            (drawableSlider = (DrawableSlider)Player.DrawableRuleset.Playfield.AllHitObjects.SingleOrDefault(d => d.HitObject == slider)) != null);
-
-        private void ensureSnakingIn(double startTime) => checkPositionChange(startTime, sliderEnd, positionIncreased);
-        private void ensureNoSnakingIn(double startTime) => checkPositionChange(startTime, sliderEnd, positionRemainsSame);
-
-        private void ensureSnakingOut(double startTime, int repeatIndex)
+        private void retrieveSlider(int index)
         {
-            var repeatTime = timeAtRepeat(startTime, repeatIndex);
+            AddStep("retrieve slider at index", () => slider = (Slider)beatmap.HitObjects[index]);
+            addSeekStep(() => slider);
+            AddUntilStep("retrieve drawable slider", () =>
+                (drawableSlider = (DrawableSlider)Player.DrawableRuleset.Playfield.AllHitObjects.SingleOrDefault(d => d.HitObject == slider)) != null);
+        }
 
+        private void addEnsureSnakingInSteps(Func<double> startTime) => addCheckPositionChangeSteps(startTime, getSliderEnd, positionIncreased);
+        private void addEnsureNoSnakingInSteps(Func<double> startTime) => addCheckPositionChangeSteps(startTime, getSliderEnd, positionRemainsSame);
+
+        private void addEnsureSnakingOutSteps(Func<double> startTime, int repeatIndex)
+        {
             if (repeatIndex % 2 == 0)
-                checkPositionChange(repeatTime, sliderStart, positionIncreased);
+                addCheckPositionChangeSteps(timeAtRepeat(startTime, repeatIndex), getSliderStart, positionIncreased);
             else
-                checkPositionChange(repeatTime, sliderEnd, positionDecreased);
+                addCheckPositionChangeSteps(timeAtRepeat(startTime, repeatIndex), getSliderEnd, positionDecreased);
         }
 
-        private void ensureNoSnakingOut(double startTime, int repeatIndex) =>
-            checkPositionChange(timeAtRepeat(startTime, repeatIndex), positionAtRepeat(repeatIndex), positionRemainsSame);
+        private void addEnsureNoSnakingOutStep(Func<double> startTime, int repeatIndex)
+            => addCheckPositionChangeSteps(timeAtRepeat(startTime, repeatIndex), positionAtRepeat(repeatIndex), positionRemainsSame);
 
-        private double timeAtRepeat(double startTime, int repeatIndex) => startTime + 100 + duration_of_span * repeatIndex;
-        private Func<Vector2> positionAtRepeat(int repeatIndex) => repeatIndex % 2 == 0 ? (Func<Vector2>)sliderStart : sliderEnd;
+        private Func<double> timeAtRepeat(Func<double> startTime, int repeatIndex) => () => startTime() + 100 + duration_of_span * repeatIndex;
+        private Func<Vector2> positionAtRepeat(int repeatIndex) => repeatIndex % 2 == 0 ? (Func<Vector2>)getSliderStart : getSliderEnd;
 
-        private List<Vector2> sliderCurve => ((PlaySliderBody)drawableSlider.Body.Drawable).CurrentCurve;
-        private Vector2 sliderStart() => sliderCurve.First();
-        private Vector2 sliderEnd() => sliderCurve.Last();
+        private List<Vector2> getSliderCurve() => ((PlaySliderBody)drawableSlider.Body.Drawable).CurrentCurve;
+        private Vector2 getSliderStart() => getSliderCurve().First();
+        private Vector2 getSliderEnd() => getSliderCurve().Last();
 
-        private Vector2 sliderRepeat()
+        private Vector2 getSliderRepeat()
         {
-            var drawable = Player.DrawableRuleset.Playfield.AllHitObjects.SingleOrDefault(d => d.HitObject == hitObjects[1]);
+            var drawable = Player.DrawableRuleset.Playfield.AllHitObjects.SingleOrDefault(d => d.HitObject == beatmap.HitObjects[1]);
             var repeat = drawable.ChildrenOfType<Container<DrawableSliderRepeat>>().First().Children.First();
             return repeat.Position;
         }
@@ -167,7 +176,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         private bool positionDecreased(Vector2 previous, Vector2 current) => current.X < previous.X && current.Y < previous.Y;
         private bool positionAlmostSame(Vector2 previous, Vector2 current) => Precision.AlmostEquals(previous, current, 1);
 
-        private void checkPositionChange(double startTime, Func<Vector2> positionToCheck, Func<Vector2, Vector2, bool> positionAssertion)
+        private void addCheckPositionChangeSteps(Func<double> startTime, Func<Vector2> positionToCheck, Func<Vector2, Vector2, bool> positionAssertion)
         {
             Vector2 previousPosition = Vector2.Zero;
 
@@ -176,7 +185,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             addSeekStep(startTime);
             AddStep($"save {positionDescription} position", () => previousPosition = positionToCheck.Invoke());
-            addSeekStep(startTime + 100);
+            addSeekStep(() => startTime() + 100);
             AddAssert($"{positionDescription} {assertionDescription}", () =>
             {
                 var currentPosition = positionToCheck.Invoke();
@@ -193,19 +202,21 @@ namespace osu.Game.Rulesets.Osu.Tests
             });
         }
 
-        private void addSeekStep(double time)
+        private void addSeekStep(Func<Slider> slider)
         {
-            AddStep($"seek to {time}", () => MusicController.SeekTo(time));
-
-            AddUntilStep("wait for seek to finish", () => Precision.AlmostEquals(time, Player.DrawableRuleset.FrameStableClock.CurrentTime, 100));
+            AddStep("seek to slider", () => Player.GameplayClockContainer.Seek(slider().StartTime));
+            AddUntilStep("wait for seek to finish", () => Precision.AlmostEquals(slider().StartTime, Player.DrawableRuleset.FrameStableClock.CurrentTime, 100));
         }
 
-        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new Beatmap
+        private void addSeekStep(Func<double> time)
         {
-            HitObjects = hitObjects
-        };
+            AddStep("seek to time", () => Player.GameplayClockContainer.Seek(time()));
+            AddUntilStep("wait for seek to finish", () => Precision.AlmostEquals(time(), Player.DrawableRuleset.FrameStableClock.CurrentTime, 100));
+        }
 
-        private readonly List<HitObject> hitObjects = new List<HitObject>
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new Beatmap { HitObjects = createHitObjects() };
+
+        private static List<HitObject> createHitObjects() => new List<HitObject>
         {
             new Slider
             {

osu.Game.Rulesets.Osu.Tests/TestSceneSpinnerRotation.cs

@@ -217,7 +217,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
         private void addSeekStep(double time)
         {
-            AddStep($"seek to {time}", () => MusicController.SeekTo(time));
+            AddStep($"seek to {time}", () => Player.GameplayClockContainer.Seek(time));
 
             AddUntilStep("wait for seek to finish", () => Precision.AlmostEquals(time, Player.DrawableRuleset.FrameStableClock.CurrentTime, 100));
         }

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointPiece.cs

@@ -13,6 +13,7 @@ using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Primitives;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.Events;
+using osu.Framework.Localisation;
 using osu.Framework.Utils;
 using osu.Game.Graphics;
 using osu.Game.Rulesets.Edit;
@@ -283,6 +284,6 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             }
         }
 
-        public string TooltipText => ControlPoint.Type.Value.ToString() ?? string.Empty;
+        public LocalisableString TooltipText => ControlPoint.Type.Value.ToString() ?? string.Empty;
     }
 }

osu.Game.Tests/Beatmaps/IO/ImportBeatmapTest.cs

@@ -19,7 +19,9 @@ using osu.Game.Database;
 using osu.Game.IO;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Scoring;
 using osu.Game.Tests.Resources;
+using osu.Game.Tests.Scores.IO;
 using osu.Game.Users;
 using SharpCompress.Archives;
 using SharpCompress.Archives.Zip;
@@ -185,13 +187,62 @@ namespace osu.Game.Tests.Beatmaps.IO
             }
         }
 
-        private string hashFile(string filename)
+        [Test]
+        public async Task TestImportThenImportWithChangedHashedFile()
         {
-            using (var s = File.OpenRead(filename))
-                return s.ComputeMD5Hash();
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(ImportBeatmapTest)))
+            {
+                try
+                {
+                    var osu = LoadOsuIntoHost(host);
+
+                    var temp = TestResources.GetTestBeatmapForImport();
+
+                    string extractedFolder = $"{temp}_extracted";
+                    Directory.CreateDirectory(extractedFolder);
+
+                    try
+                    {
+                        var imported = await LoadOszIntoOsu(osu);
+
+                        await createScoreForBeatmap(osu, imported.Beatmaps.First());
+
+                        using (var zip = ZipArchive.Open(temp))
+                            zip.WriteToDirectory(extractedFolder);
+
+                        // arbitrary write to hashed file
+                        // this triggers the special BeatmapManager.PreImport deletion/replacement flow.
+                        using (var sw = new FileInfo(Directory.GetFiles(extractedFolder, "*.osu").First()).AppendText())
+                            await sw.WriteLineAsync("// changed");
+
+                        using (var zip = ZipArchive.Create())
+                        {
+                            zip.AddAllFromDirectory(extractedFolder);
+                            zip.SaveTo(temp, new ZipWriterOptions(CompressionType.Deflate));
+                        }
+
+                        var importedSecondTime = await osu.Dependencies.Get<BeatmapManager>().Import(new ImportTask(temp));
+
+                        ensureLoaded(osu);
+
+                        // check the newly "imported" beatmap is not the original.
+                        Assert.IsTrue(imported.ID != importedSecondTime.ID);
+                        Assert.IsTrue(imported.Beatmaps.First().ID != importedSecondTime.Beatmaps.First().ID);
+                    }
+                    finally
+                    {
+                        Directory.Delete(extractedFolder, true);
+                    }
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
         }
 
         [Test]
+        [Ignore("intentionally broken by import optimisations")]
         public async Task TestImportThenImportWithChangedFile()
         {
             using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(ImportBeatmapTest)))
@@ -294,6 +345,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         }
 
         [Test]
+        [Ignore("intentionally broken by import optimisations")]
         public async Task TestImportCorruptThenImport()
         {
             // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
@@ -439,12 +491,11 @@ namespace osu.Game.Tests.Beatmaps.IO
             }
         }
 
-        [TestCase(true)]
-        [TestCase(false)]
-        public async Task TestImportThenDeleteThenImportWithOnlineIDMismatch(bool set)
+        [Test]
+        public async Task TestImportThenDeleteThenImportWithOnlineIDsMissing()
         {
             // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost($"{nameof(ImportBeatmapTest)}-{set}"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost($"{nameof(ImportBeatmapTest)}"))
             {
                 try
                 {
@@ -452,10 +503,8 @@ namespace osu.Game.Tests.Beatmaps.IO
 
                     var imported = await LoadOszIntoOsu(osu);
 
-                    if (set)
-                        imported.OnlineBeatmapSetID = 1234;
-                    else
-                        imported.Beatmaps.First().OnlineBeatmapID = 1234;
+                    foreach (var b in imported.Beatmaps)
+                        b.OnlineBeatmapID = null;
 
                     osu.Dependencies.Get<BeatmapManager>().Update(imported);
 
@@ -895,7 +944,17 @@ namespace osu.Game.Tests.Beatmaps.IO
             Assert.IsTrue(manager.QueryBeatmapSets(_ => true).First().DeletePending);
         }
 
-        private void checkBeatmapSetCount(OsuGameBase osu, int expected, bool includeDeletePending = false)
+        private static Task createScoreForBeatmap(OsuGameBase osu, BeatmapInfo beatmap)
+        {
+            return ImportScoreTest.LoadScoreIntoOsu(osu, new ScoreInfo
+            {
+                OnlineScoreID = 2,
+                Beatmap = beatmap,
+                BeatmapInfoID = beatmap.ID
+            }, new ImportScoreTest.TestArchiveReader());
+        }
+
+        private static void checkBeatmapSetCount(OsuGameBase osu, int expected, bool includeDeletePending = false)
         {
             var manager = osu.Dependencies.Get<BeatmapManager>();
 
@@ -904,12 +963,18 @@ namespace osu.Game.Tests.Beatmaps.IO
                 : manager.GetAllUsableBeatmapSets().Count);
         }
 
-        private void checkBeatmapCount(OsuGameBase osu, int expected)
+        private static string hashFile(string filename)
+        {
+            using (var s = File.OpenRead(filename))
+                return s.ComputeMD5Hash();
+        }
+
+        private static void checkBeatmapCount(OsuGameBase osu, int expected)
         {
             Assert.AreEqual(expected, osu.Dependencies.Get<BeatmapManager>().QueryBeatmaps(_ => true).ToList().Count);
         }
 
-        private void checkSingleReferencedFileCount(OsuGameBase osu, int expected)
+        private static void checkSingleReferencedFileCount(OsuGameBase osu, int expected)
         {
             Assert.AreEqual(expected, osu.Dependencies.Get<FileStore>().QueryFiles(f => f.ReferenceCount == 1).Count());
         }

osu.Game.Tests/Chat/TestSceneChannelManager.cs

@@ -0,0 +1,105 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Testing;
+using osu.Game.Online.API;
+using osu.Game.Online.API.Requests;
+using osu.Game.Online.Chat;
+using osu.Game.Tests.Visual;
+using osu.Game.Users;
+
+namespace osu.Game.Tests.Chat
+{
+    [HeadlessTest]
+    public class TestSceneChannelManager : OsuTestScene
+    {
+        private ChannelManager channelManager;
+        private int currentMessageId;
+
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            var container = new ChannelManagerContainer();
+            Child = container;
+            channelManager = container.ChannelManager;
+        });
+
+        [SetUpSteps]
+        public void SetUpSteps()
+        {
+            AddStep("register request handling", () =>
+            {
+                currentMessageId = 0;
+
+                ((DummyAPIAccess)API).HandleRequest = req =>
+                {
+                    switch (req)
+                    {
+                        case JoinChannelRequest joinChannel:
+                            joinChannel.TriggerSuccess();
+                            return true;
+
+                        case PostMessageRequest postMessage:
+                            postMessage.TriggerSuccess(new Message(++currentMessageId)
+                            {
+                                IsAction = postMessage.Message.IsAction,
+                                ChannelId = postMessage.Message.ChannelId,
+                                Content = postMessage.Message.Content,
+                                Links = postMessage.Message.Links,
+                                Timestamp = postMessage.Message.Timestamp,
+                                Sender = postMessage.Message.Sender
+                            });
+
+                            return true;
+                    }
+
+                    return false;
+                };
+            });
+        }
+
+        [Test]
+        public void TestCommandsPostedToCorrectChannelWhenNotCurrent()
+        {
+            Channel channel1 = null;
+            Channel channel2 = null;
+
+            AddStep("join 2 rooms", () =>
+            {
+                channelManager.JoinChannel(channel1 = createChannel(1, ChannelType.Public));
+                channelManager.JoinChannel(channel2 = createChannel(2, ChannelType.Public));
+            });
+
+            AddStep("select channel 1", () => channelManager.CurrentChannel.Value = channel1);
+
+            AddStep("post /me command to channel 2", () => channelManager.PostCommand("me dances", channel2));
+            AddAssert("/me command received by channel 2", () => channel2.Messages.Last().Content == "dances");
+
+            AddStep("post /np command to channel 2", () => channelManager.PostCommand("np", channel2));
+            AddAssert("/np command received by channel 2", () => channel2.Messages.Last().Content.Contains("is listening to"));
+        }
+
+        private Channel createChannel(int id, ChannelType type) => new Channel(new User())
+        {
+            Id = id,
+            Name = $"Channel {id}",
+            Topic = $"Topic of channel {id} with type {type}",
+            Type = type,
+        };
+
+        private class ChannelManagerContainer : CompositeDrawable
+        {
+            [Cached]
+            public ChannelManager ChannelManager { get; } = new ChannelManager();
+
+            public ChannelManagerContainer()
+            {
+                InternalChild = ChannelManager;
+            }
+        }
+    }
+}

osu.Game.Tests/Editing/Checks/CheckFewHitsoundsTest.cs

@@ -0,0 +1,241 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Game.Audio;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Tests.Beatmaps;
+
+namespace osu.Game.Tests.Editing.Checks
+{
+    [TestFixture]
+    public class CheckFewHitsoundsTest
+    {
+        private CheckFewHitsounds check;
+
+        private List<HitSampleInfo> notHitsounded;
+        private List<HitSampleInfo> hitsounded;
+
+        [SetUp]
+        public void Setup()
+        {
+            check = new CheckFewHitsounds();
+            notHitsounded = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) };
+            hitsounded = new List<HitSampleInfo>
+            {
+                new HitSampleInfo(HitSampleInfo.HIT_NORMAL),
+                new HitSampleInfo(HitSampleInfo.HIT_FINISH)
+            };
+        }
+
+        [Test]
+        public void TestHitsounded()
+        {
+            var hitObjects = new List<HitObject>();
+
+            for (int i = 0; i < 16; ++i)
+            {
+                var samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) };
+
+                if ((i + 1) % 2 == 0)
+                    samples.Add(new HitSampleInfo(HitSampleInfo.HIT_CLAP));
+                if ((i + 1) % 3 == 0)
+                    samples.Add(new HitSampleInfo(HitSampleInfo.HIT_WHISTLE));
+                if ((i + 1) % 4 == 0)
+                    samples.Add(new HitSampleInfo(HitSampleInfo.HIT_FINISH));
+
+                hitObjects.Add(new HitCircle { StartTime = 1000 * i, Samples = samples });
+            }
+
+            assertOk(hitObjects);
+        }
+
+        [Test]
+        public void TestHitsoundedWithBreak()
+        {
+            var hitObjects = new List<HitObject>();
+
+            for (int i = 0; i < 32; ++i)
+            {
+                var samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) };
+
+                if ((i + 1) % 2 == 0)
+                    samples.Add(new HitSampleInfo(HitSampleInfo.HIT_CLAP));
+                if ((i + 1) % 3 == 0)
+                    samples.Add(new HitSampleInfo(HitSampleInfo.HIT_WHISTLE));
+                if ((i + 1) % 4 == 0)
+                    samples.Add(new HitSampleInfo(HitSampleInfo.HIT_FINISH));
+                // Leaves a gap in which no hitsounds exist or can be added, and so shouldn't be an issue.
+                if (i > 8 && i < 24)
+                    continue;
+
+                hitObjects.Add(new HitCircle { StartTime = 1000 * i, Samples = samples });
+            }
+
+            assertOk(hitObjects);
+        }
+
+        [Test]
+        public void TestLightlyHitsounded()
+        {
+            var hitObjects = new List<HitObject>();
+
+            for (int i = 0; i < 30; ++i)
+            {
+                var samples = i % 8 == 0 ? hitsounded : notHitsounded;
+
+                hitObjects.Add(new HitCircle { StartTime = 1000 * i, Samples = samples });
+            }
+
+            assertLongPeriodNegligible(hitObjects, count: 3);
+        }
+
+        [Test]
+        public void TestRarelyHitsounded()
+        {
+            var hitObjects = new List<HitObject>();
+
+            for (int i = 0; i < 30; ++i)
+            {
+                var samples = (i == 0 || i == 15) ? hitsounded : notHitsounded;
+
+                hitObjects.Add(new HitCircle { StartTime = 1000 * i, Samples = samples });
+            }
+
+            // Should prompt one warning between 1st and 16th, and another between 16th and 31st.
+            assertLongPeriodWarning(hitObjects, count: 2);
+        }
+
+        [Test]
+        public void TestExtremelyRarelyHitsounded()
+        {
+            var hitObjects = new List<HitObject>();
+
+            for (int i = 0; i < 80; ++i)
+            {
+                var samples = i == 40 ? hitsounded : notHitsounded;
+
+                hitObjects.Add(new HitCircle { StartTime = 1000 * i, Samples = samples });
+            }
+
+            // Should prompt one problem between 1st and 41st, and another between 41st and 81st.
+            assertLongPeriodProblem(hitObjects, count: 2);
+        }
+
+        [Test]
+        public void TestNotHitsounded()
+        {
+            var hitObjects = new List<HitObject>();
+
+            for (int i = 0; i < 20; ++i)
+                hitObjects.Add(new HitCircle { StartTime = 1000 * i, Samples = notHitsounded });
+
+            assertNoHitsounds(hitObjects);
+        }
+
+        [Test]
+        public void TestNestedObjectsHitsounded()
+        {
+            var ticks = new List<HitObject>();
+            for (int i = 1; i < 16; ++i)
+                ticks.Add(new SliderTick { StartTime = 1000 * i, Samples = hitsounded });
+
+            var nested = new MockNestableHitObject(ticks.ToList(), 0, 16000)
+            {
+                Samples = hitsounded
+            };
+            nested.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
+
+            assertOk(new List<HitObject> { nested });
+        }
+
+        [Test]
+        public void TestNestedObjectsRarelyHitsounded()
+        {
+            var ticks = new List<HitObject>();
+            for (int i = 1; i < 16; ++i)
+                ticks.Add(new SliderTick { StartTime = 1000 * i, Samples = i == 0 ? hitsounded : notHitsounded });
+
+            var nested = new MockNestableHitObject(ticks.ToList(), 0, 16000)
+            {
+                Samples = hitsounded
+            };
+            nested.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
+
+            assertLongPeriodWarning(new List<HitObject> { nested });
+        }
+
+        [Test]
+        public void TestConcurrentObjects()
+        {
+            var hitObjects = new List<HitObject>();
+
+            var ticks = new List<HitObject>();
+            for (int i = 1; i < 10; ++i)
+                ticks.Add(new SliderTick { StartTime = 5000 * i, Samples = hitsounded });
+
+            var nested = new MockNestableHitObject(ticks.ToList(), 0, 50000)
+            {
+                Samples = notHitsounded
+            };
+            nested.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
+            hitObjects.Add(nested);
+
+            for (int i = 1; i <= 6; ++i)
+                hitObjects.Add(new HitCircle { StartTime = 10000 * i, Samples = notHitsounded });
+
+            assertOk(hitObjects);
+        }
+
+        private void assertOk(List<HitObject> hitObjects)
+        {
+            Assert.That(check.Run(getContext(hitObjects)), Is.Empty);
+        }
+
+        private void assertLongPeriodProblem(List<HitObject> hitObjects, int count = 1)
+        {
+            var issues = check.Run(getContext(hitObjects)).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(count));
+            Assert.That(issues.All(issue => issue.Template is CheckFewHitsounds.IssueTemplateLongPeriodProblem));
+        }
+
+        private void assertLongPeriodWarning(List<HitObject> hitObjects, int count = 1)
+        {
+            var issues = check.Run(getContext(hitObjects)).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(count));
+            Assert.That(issues.All(issue => issue.Template is CheckFewHitsounds.IssueTemplateLongPeriodWarning));
+        }
+
+        private void assertLongPeriodNegligible(List<HitObject> hitObjects, int count = 1)
+        {
+            var issues = check.Run(getContext(hitObjects)).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(count));
+            Assert.That(issues.All(issue => issue.Template is CheckFewHitsounds.IssueTemplateLongPeriodNegligible));
+        }
+
+        private void assertNoHitsounds(List<HitObject> hitObjects)
+        {
+            var issues = check.Run(getContext(hitObjects)).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Any(issue => issue.Template is CheckFewHitsounds.IssueTemplateNoHitsounds));
+        }
+
+        private BeatmapVerifierContext getContext(List<HitObject> hitObjects)
+        {
+            var beatmap = new Beatmap<HitObject> { HitObjects = hitObjects };
+
+            return new BeatmapVerifierContext(beatmap, new TestWorkingBeatmap(beatmap));
+        }
+    }
+}

osu.Game.Tests/Editing/Checks/CheckMutedObjectsTest.cs

@@ -0,0 +1,289 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Game.Audio;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Tests.Beatmaps;
+
+namespace osu.Game.Tests.Editing.Checks
+{
+    [TestFixture]
+    public class CheckMutedObjectsTest
+    {
+        private CheckMutedObjects check;
+        private ControlPointInfo cpi;
+
+        private const int volume_regular = 50;
+        private const int volume_low = 15;
+        private const int volume_muted = 5;
+
+        [SetUp]
+        public void Setup()
+        {
+            check = new CheckMutedObjects();
+
+            cpi = new ControlPointInfo();
+            cpi.Add(0, new SampleControlPoint { SampleVolume = volume_regular });
+            cpi.Add(1000, new SampleControlPoint { SampleVolume = volume_low });
+            cpi.Add(2000, new SampleControlPoint { SampleVolume = volume_muted });
+        }
+
+        [Test]
+        public void TestNormalControlPointVolume()
+        {
+            var hitcircle = new HitCircle
+            {
+                StartTime = 0,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) }
+            };
+            hitcircle.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertOk(new List<HitObject> { hitcircle });
+        }
+
+        [Test]
+        public void TestLowControlPointVolume()
+        {
+            var hitcircle = new HitCircle
+            {
+                StartTime = 1000,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) }
+            };
+            hitcircle.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertLowVolume(new List<HitObject> { hitcircle });
+        }
+
+        [Test]
+        public void TestMutedControlPointVolume()
+        {
+            var hitcircle = new HitCircle
+            {
+                StartTime = 2000,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) }
+            };
+            hitcircle.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertMuted(new List<HitObject> { hitcircle });
+        }
+
+        [Test]
+        public void TestNormalSampleVolume()
+        {
+            // The sample volume should take precedence over the control point volume.
+            var hitcircle = new HitCircle
+            {
+                StartTime = 2000,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL, volume: volume_regular) }
+            };
+            hitcircle.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertOk(new List<HitObject> { hitcircle });
+        }
+
+        [Test]
+        public void TestLowSampleVolume()
+        {
+            var hitcircle = new HitCircle
+            {
+                StartTime = 2000,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL, volume: volume_low) }
+            };
+            hitcircle.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertLowVolume(new List<HitObject> { hitcircle });
+        }
+
+        [Test]
+        public void TestMutedSampleVolume()
+        {
+            var hitcircle = new HitCircle
+            {
+                StartTime = 0,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL, volume: volume_muted) }
+            };
+            hitcircle.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertMuted(new List<HitObject> { hitcircle });
+        }
+
+        [Test]
+        public void TestNormalSampleVolumeSlider()
+        {
+            var sliderHead = new SliderHeadCircle
+            {
+                StartTime = 0,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) }
+            };
+            sliderHead.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            var sliderTick = new SliderTick
+            {
+                StartTime = 250,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo("slidertick", volume: volume_muted) } // Should be fine.
+            };
+            sliderTick.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            var slider = new MockNestableHitObject(new List<HitObject> { sliderHead, sliderTick, }, startTime: 0, endTime: 500)
+            {
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) }
+            };
+            slider.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertOk(new List<HitObject> { slider });
+        }
+
+        [Test]
+        public void TestMutedSampleVolumeSliderHead()
+        {
+            var sliderHead = new SliderHeadCircle
+            {
+                StartTime = 0,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL, volume: volume_muted) }
+            };
+            sliderHead.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            var sliderTick = new SliderTick
+            {
+                StartTime = 250,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo("slidertick") }
+            };
+            sliderTick.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            var slider = new MockNestableHitObject(new List<HitObject> { sliderHead, sliderTick, }, startTime: 0, endTime: 500)
+            {
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) } // Applies to the tail.
+            };
+            slider.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertMuted(new List<HitObject> { slider });
+        }
+
+        [Test]
+        public void TestMutedSampleVolumeSliderTail()
+        {
+            var sliderHead = new SliderHeadCircle
+            {
+                StartTime = 0,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) }
+            };
+            sliderHead.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            var sliderTick = new SliderTick
+            {
+                StartTime = 250,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo("slidertick") }
+            };
+            sliderTick.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            var slider = new MockNestableHitObject(new List<HitObject> { sliderHead, sliderTick, }, startTime: 0, endTime: 2500)
+            {
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL, volume: volume_muted) } // Applies to the tail.
+            };
+            slider.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertMutedPassive(new List<HitObject> { slider });
+        }
+
+        [Test]
+        public void TestMutedControlPointVolumeSliderHead()
+        {
+            var sliderHead = new SliderHeadCircle
+            {
+                StartTime = 2000,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) }
+            };
+            sliderHead.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            var sliderTick = new SliderTick
+            {
+                StartTime = 2250,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo("slidertick") }
+            };
+            sliderTick.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            var slider = new MockNestableHitObject(new List<HitObject> { sliderHead, sliderTick, }, startTime: 2000, endTime: 2500)
+            {
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL, volume: volume_regular) }
+            };
+            slider.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertMuted(new List<HitObject> { slider });
+        }
+
+        [Test]
+        public void TestMutedControlPointVolumeSliderTail()
+        {
+            var sliderHead = new SliderHeadCircle
+            {
+                StartTime = 0,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) }
+            };
+            sliderHead.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            var sliderTick = new SliderTick
+            {
+                StartTime = 250,
+                Samples = new List<HitSampleInfo> { new HitSampleInfo("slidertick") }
+            };
+            sliderTick.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            // Ends after the 5% control point.
+            var slider = new MockNestableHitObject(new List<HitObject> { sliderHead, sliderTick, }, startTime: 0, endTime: 2500)
+            {
+                Samples = new List<HitSampleInfo> { new HitSampleInfo(HitSampleInfo.HIT_NORMAL) }
+            };
+            slider.ApplyDefaults(cpi, new BeatmapDifficulty());
+
+            assertMutedPassive(new List<HitObject> { slider });
+        }
+
+        private void assertOk(List<HitObject> hitObjects)
+        {
+            Assert.That(check.Run(getContext(hitObjects)), Is.Empty);
+        }
+
+        private void assertLowVolume(List<HitObject> hitObjects, int count = 1)
+        {
+            var issues = check.Run(getContext(hitObjects)).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(count));
+            Assert.That(issues.All(issue => issue.Template is CheckMutedObjects.IssueTemplateLowVolumeActive));
+        }
+
+        private void assertMuted(List<HitObject> hitObjects, int count = 1)
+        {
+            var issues = check.Run(getContext(hitObjects)).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(count));
+            Assert.That(issues.All(issue => issue.Template is CheckMutedObjects.IssueTemplateMutedActive));
+        }
+
+        private void assertMutedPassive(List<HitObject> hitObjects)
+        {
+            var issues = check.Run(getContext(hitObjects)).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Any(issue => issue.Template is CheckMutedObjects.IssueTemplateMutedPassive));
+        }
+
+        private BeatmapVerifierContext getContext(List<HitObject> hitObjects)
+        {
+            var beatmap = new Beatmap<HitObject>
+            {
+                ControlPointInfo = cpi,
+                HitObjects = hitObjects
+            };
+
+            return new BeatmapVerifierContext(beatmap, new TestWorkingBeatmap(beatmap));
+        }
+    }
+}

osu.Game.Tests/Editing/Checks/MockNestableHitObject.cs

@@ -0,0 +1,36 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using System.Threading;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+
+namespace osu.Game.Tests.Editing.Checks
+{
+    public sealed class MockNestableHitObject : HitObject, IHasDuration
+    {
+        private readonly IEnumerable<HitObject> toBeNested;
+
+        public MockNestableHitObject(IEnumerable<HitObject> toBeNested, double startTime, double endTime)
+        {
+            this.toBeNested = toBeNested;
+            StartTime = startTime;
+            EndTime = endTime;
+        }
+
+        protected override void CreateNestedHitObjects(CancellationToken cancellationToken)
+        {
+            foreach (var hitObject in toBeNested)
+                AddNested(hitObject);
+        }
+
+        public double EndTime { get; }
+
+        public double Duration
+        {
+            get => EndTime - StartTime;
+            set => throw new System.NotImplementedException();
+        }
+    }
+}

osu.Game.Tests/ImportTest.cs

@@ -17,7 +17,8 @@ namespace osu.Game.Tests
         protected virtual TestOsuGameBase LoadOsuIntoHost(GameHost host, bool withBeatmap = false)
         {
             var osu = new TestOsuGameBase(withBeatmap);
-            Task.Run(() => host.Run(osu));
+            Task.Run(() => host.Run(osu))
+                .ContinueWith(t => Assert.Fail($"Host threw exception {t.Exception}"), TaskContinuationOptions.OnlyOnFaulted);
 
             waitForOrAssert(() => osu.IsLoaded, @"osu! failed to start in a reasonable amount of time");
 

osu.Game.Tests/NonVisual/Filtering/FilterQueryParserTest.cs

@@ -90,6 +90,20 @@ namespace osu.Game.Tests.NonVisual.Filtering
             Assert.Less(filterCriteria.DrainRate.Min, 6.1f);
         }
 
+        [Test]
+        public void TestApplyOverallDifficultyQueries()
+        {
+            const string query = "od>4 easy od<8";
+            var filterCriteria = new FilterCriteria();
+            FilterQueryParser.ApplyQueries(filterCriteria, query);
+            Assert.AreEqual("easy", filterCriteria.SearchText.Trim());
+            Assert.AreEqual(1, filterCriteria.SearchTerms.Length);
+            Assert.Greater(filterCriteria.OverallDifficulty.Min, 4.0);
+            Assert.Less(filterCriteria.OverallDifficulty.Min, 4.1);
+            Assert.Greater(filterCriteria.OverallDifficulty.Max, 7.9);
+            Assert.Less(filterCriteria.OverallDifficulty.Max, 8.0);
+        }
+
         [Test]
         public void TestApplyBPMQueries()
         {

osu.Game.Tests/NonVisual/Multiplayer/StatefulMultiplayerClientTest.cs

@@ -7,6 +7,7 @@ using NUnit.Framework;
 using osu.Framework.Extensions.ObjectExtensions;
 using osu.Framework.Testing;
 using osu.Game.Online.Multiplayer;
+using osu.Game.Online.Rooms;
 using osu.Game.Tests.Visual.Multiplayer;
 using osu.Game.Users;
 
@@ -50,7 +51,10 @@ namespace osu.Game.Tests.NonVisual.Multiplayer
 
             AddStep("create room initially in gameplay", () =>
             {
-                Room.RoomID.Value = null;
+                var newRoom = new Room();
+                newRoom.CopyFrom(SelectedRoom.Value);
+
+                newRoom.RoomID.Value = null;
                 Client.RoomSetupAction = room =>
                 {
                     room.State = MultiplayerRoomState.Playing;
@@ -61,7 +65,7 @@ namespace osu.Game.Tests.NonVisual.Multiplayer
                     });
                 };
 
-                RoomManager.CreateRoom(Room);
+                RoomManager.CreateRoom(newRoom);
             });
 
             AddUntilStep("wait for room join", () => Client.Room != null);

osu.Game.Tests/OnlinePlay/TestSceneCatchUpSyncManager.cs

@@ -31,32 +31,24 @@ namespace osu.Game.Tests.OnlinePlay
         }
 
         [Test]
-        public void TestMasterClockStartsWhenAllPlayerClocksHaveFrames()
+        public void TestPlayerClocksStartWhenAllHaveFrames()
         {
             setWaiting(() => player1, false);
-            assertMasterState(false);
             assertPlayerClockState(() => player1, false);
             assertPlayerClockState(() => player2, false);
 
             setWaiting(() => player2, false);
-            assertMasterState(true);
             assertPlayerClockState(() => player1, true);
             assertPlayerClockState(() => player2, true);
         }
 
         [Test]
-        public void TestMasterClockDoesNotStartWhenNoneReadyForMaximumDelayTime()
-        {
-            AddWaitStep($"wait {CatchUpSyncManager.MAXIMUM_START_DELAY} milliseconds", (int)Math.Ceiling(CatchUpSyncManager.MAXIMUM_START_DELAY / TimePerAction));
-            assertMasterState(false);
-        }
-
-        [Test]
-        public void TestMasterClockStartsWhenAnyReadyForMaximumDelayTime()
+        public void TestReadyPlayersStartWhenReadyForMaximumDelayTime()
         {
             setWaiting(() => player1, false);
             AddWaitStep($"wait {CatchUpSyncManager.MAXIMUM_START_DELAY} milliseconds", (int)Math.Ceiling(CatchUpSyncManager.MAXIMUM_START_DELAY / TimePerAction));
-            assertMasterState(true);
+            assertPlayerClockState(() => player1, true);
+            assertPlayerClockState(() => player2, false);
         }
 
         [Test]
@@ -153,9 +145,6 @@ namespace osu.Game.Tests.OnlinePlay
         private void setPlayerClockTime(Func<TestSpectatorPlayerClock> playerClock, double offsetFromMaster)
             => AddStep($"set player clock {playerClock().Id} = master - {offsetFromMaster}", () => playerClock().Seek(master.CurrentTime - offsetFromMaster));
 
-        private void assertMasterState(bool running)
-            => AddAssert($"master clock {(running ? "is" : "is not")} running", () => master.IsRunning == running);
-
         private void assertCatchingUp(Func<TestSpectatorPlayerClock> playerClock, bool catchingUp) =>
             AddAssert($"player clock {playerClock().Id} {(catchingUp ? "is" : "is not")} catching up", () => playerClock().IsCatchingUp == catchingUp);
 
@@ -201,6 +190,11 @@ namespace osu.Game.Tests.OnlinePlay
 
         private class TestManualClock : ManualClock, IAdjustableClock
         {
+            public TestManualClock()
+            {
+                IsRunning = true;
+            }
+
             public void Start() => IsRunning = true;
 
             public void Stop() => IsRunning = false;

osu.Game.Tests/Rulesets/TestSceneRulesetSkinProvidingContainer.cs

@@ -0,0 +1,89 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Audio.Sample;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.OpenGL.Textures;
+using osu.Framework.Graphics.Textures;
+using osu.Framework.Testing;
+using osu.Game.Audio;
+using osu.Game.Rulesets;
+using osu.Game.Skinning;
+using osu.Game.Tests.Testing;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Tests.Rulesets
+{
+    [HeadlessTest]
+    public class TestSceneRulesetSkinProvidingContainer : OsuTestScene
+    {
+        private SkinRequester requester;
+
+        protected override Ruleset CreateRuleset() => new TestSceneRulesetDependencies.TestRuleset();
+
+        [Test]
+        public void TestRulesetResources()
+        {
+            setupProviderStep();
+
+            AddAssert("ruleset texture retrieved via skin", () => requester.GetTexture("test-image") != null);
+            AddAssert("ruleset sample retrieved via skin", () => requester.GetSample(new SampleInfo("test-sample")) != null);
+        }
+
+        [Test]
+        public void TestEarlyAddedSkinRequester()
+        {
+            Texture textureOnLoad = null;
+
+            AddStep("setup provider", () =>
+            {
+                var rulesetSkinProvider = new RulesetSkinProvidingContainer(Ruleset.Value.CreateInstance(), Beatmap.Value.Beatmap, Beatmap.Value.Skin);
+
+                rulesetSkinProvider.Add(requester = new SkinRequester());
+
+                requester.OnLoadAsync += () => textureOnLoad = requester.GetTexture("test-image");
+
+                Child = rulesetSkinProvider;
+            });
+
+            AddAssert("requester got correct initial texture", () => textureOnLoad != null);
+        }
+
+        private void setupProviderStep()
+        {
+            AddStep("setup provider", () =>
+            {
+                Child = new RulesetSkinProvidingContainer(Ruleset.Value.CreateInstance(), Beatmap.Value.Beatmap, Beatmap.Value.Skin)
+                    .WithChild(requester = new SkinRequester());
+            });
+        }
+
+        private class SkinRequester : Drawable, ISkin
+        {
+            private ISkinSource skin;
+
+            public event Action OnLoadAsync;
+
+            [BackgroundDependencyLoader]
+            private void load(ISkinSource skin)
+            {
+                this.skin = skin;
+
+                OnLoadAsync?.Invoke();
+            }
+
+            public Drawable GetDrawableComponent(ISkinComponent component) => skin.GetDrawableComponent(component);
+
+            public Texture GetTexture(string componentName, WrapMode wrapModeS = default, WrapMode wrapModeT = default) => skin.GetTexture(componentName);
+
+            public ISample GetSample(ISampleInfo sampleInfo) => skin.GetSample(sampleInfo);
+
+            public IBindable<TValue> GetConfig<TLookup, TValue>(TLookup lookup) => skin.GetConfig<TLookup, TValue>(lookup);
+        }
+    }
+}

osu.Game.Tests/Scores/IO/ImportScoreTest.cs

@@ -43,7 +43,7 @@ namespace osu.Game.Tests.Scores.IO
                         OnlineScoreID = 12345,
                     };
 
-                    var imported = await loadScoreIntoOsu(osu, toImport);
+                    var imported = await LoadScoreIntoOsu(osu, toImport);
 
                     Assert.AreEqual(toImport.Rank, imported.Rank);
                     Assert.AreEqual(toImport.TotalScore, imported.TotalScore);
@@ -75,7 +75,7 @@ namespace osu.Game.Tests.Scores.IO
                         Mods = new Mod[] { new OsuModHardRock(), new OsuModDoubleTime() },
                     };
 
-                    var imported = await loadScoreIntoOsu(osu, toImport);
+                    var imported = await LoadScoreIntoOsu(osu, toImport);
 
                     Assert.IsTrue(imported.Mods.Any(m => m is OsuModHardRock));
                     Assert.IsTrue(imported.Mods.Any(m => m is OsuModDoubleTime));
@@ -105,7 +105,7 @@ namespace osu.Game.Tests.Scores.IO
                         }
                     };
 
-                    var imported = await loadScoreIntoOsu(osu, toImport);
+                    var imported = await LoadScoreIntoOsu(osu, toImport);
 
                     Assert.AreEqual(toImport.Statistics[HitResult.Perfect], imported.Statistics[HitResult.Perfect]);
                     Assert.AreEqual(toImport.Statistics[HitResult.Miss], imported.Statistics[HitResult.Miss]);
@@ -136,7 +136,7 @@ namespace osu.Game.Tests.Scores.IO
                         }
                     };
 
-                    var imported = await loadScoreIntoOsu(osu, toImport);
+                    var imported = await LoadScoreIntoOsu(osu, toImport);
 
                     var beatmapManager = osu.Dependencies.Get<BeatmapManager>();
                     var scoreManager = osu.Dependencies.Get<ScoreManager>();
@@ -144,7 +144,7 @@ namespace osu.Game.Tests.Scores.IO
                     beatmapManager.Delete(beatmapManager.QueryBeatmapSet(s => s.Beatmaps.Any(b => b.ID == imported.Beatmap.ID)));
                     Assert.That(scoreManager.Query(s => s.ID == imported.ID).DeletePending, Is.EqualTo(true));
 
-                    var secondImport = await loadScoreIntoOsu(osu, imported);
+                    var secondImport = await LoadScoreIntoOsu(osu, imported);
                     Assert.That(secondImport, Is.Null);
                 }
                 finally
@@ -163,7 +163,7 @@ namespace osu.Game.Tests.Scores.IO
                 {
                     var osu = LoadOsuIntoHost(host, true);
 
-                    await loadScoreIntoOsu(osu, new ScoreInfo { OnlineScoreID = 2 }, new TestArchiveReader());
+                    await LoadScoreIntoOsu(osu, new ScoreInfo { OnlineScoreID = 2 }, new TestArchiveReader());
 
                     var scoreManager = osu.Dependencies.Get<ScoreManager>();
 
@@ -177,7 +177,7 @@ namespace osu.Game.Tests.Scores.IO
             }
         }
 
-        private async Task<ScoreInfo> loadScoreIntoOsu(OsuGameBase osu, ScoreInfo score, ArchiveReader archive = null)
+        public static async Task<ScoreInfo> LoadScoreIntoOsu(OsuGameBase osu, ScoreInfo score, ArchiveReader archive = null)
         {
             var beatmapManager = osu.Dependencies.Get<BeatmapManager>();
 
@@ -190,7 +190,7 @@ namespace osu.Game.Tests.Scores.IO
             return scoreManager.GetAllUsableScores().FirstOrDefault();
         }
 
-        private class TestArchiveReader : ArchiveReader
+        internal class TestArchiveReader : ArchiveReader
         {
             public TestArchiveReader()
                 : base("test_archive")

osu.Game.Tests/Testing/TestSceneRulesetDependencies.cs

@@ -52,7 +52,7 @@ namespace osu.Game.Tests.Testing
                 Dependencies.Get<TestRulesetConfigManager>() != null);
         }
 
-        private class TestRuleset : Ruleset
+        public class TestRuleset : Ruleset
         {
             public override string Description => string.Empty;
             public override string ShortName => string.Empty;

osu.Game.Tests/Visual/Gameplay/TestSceneSpectator.cs

@@ -2,8 +2,6 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
@@ -41,8 +39,6 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Resolved]
         private OsuGameBase game { get; set; }
 
-        private int nextFrame;
-
         private BeatmapSetInfo importedBeatmap;
 
         private int importedBeatmapId;
@@ -51,8 +47,6 @@ namespace osu.Game.Tests.Visual.Gameplay
         {
             base.SetUpSteps();
 
-            AddStep("reset sent frames", () => nextFrame = 0);
-
             AddStep("import beatmap", () =>
             {
                 importedBeatmap = ImportBeatmapTest.LoadOszIntoOsu(game, virtualTrack: true).Result;
@@ -105,7 +99,8 @@ namespace osu.Game.Tests.Visual.Gameplay
             waitForPlayer();
             checkPaused(true);
 
-            sendFrames(1000); // send enough frames to ensure play won't be paused
+            // send enough frames to ensure play won't be paused
+            sendFrames(100);
 
             checkPaused(false);
         }
@@ -114,12 +109,12 @@ namespace osu.Game.Tests.Visual.Gameplay
         public void TestSpectatingDuringGameplay()
         {
             start();
+            sendFrames(300);
 
             loadSpectatingScreen();
             waitForPlayer();
 
-            AddStep("advance frame count", () => nextFrame = 300);
-            sendFrames();
+            sendFrames(300);
 
             AddUntilStep("playing from correct point in time", () => player.ChildrenOfType<DrawableRuleset>().First().FrameStableClock.CurrentTime > 30000);
         }
@@ -220,11 +215,7 @@ namespace osu.Game.Tests.Visual.Gameplay
 
         private void sendFrames(int count = 10)
         {
-            AddStep("send frames", () =>
-            {
-                testSpectatorClient.SendFrames(streamingUser.Id, nextFrame, count);
-                nextFrame += count;
-            });
+            AddStep("send frames", () => testSpectatorClient.SendFrames(streamingUser.Id, count));
         }
 
         private void loadSpectatingScreen()
@@ -232,14 +223,5 @@ namespace osu.Game.Tests.Visual.Gameplay
             AddStep("load screen", () => LoadScreen(spectatorScreen = new SoloSpectator(streamingUser)));
             AddUntilStep("wait for screen load", () => spectatorScreen.LoadState == LoadState.Loaded);
         }
-
-        internal class TestUserLookupCache : UserLookupCache
-        {
-            protected override Task<User> ComputeValueAsync(int lookup, CancellationToken token = default) => Task.FromResult(new User
-            {
-                Id = lookup,
-                Username = $"User {lookup}"
-            });
-        }
     }
 }

osu.Game.Tests/Visual/Multiplayer/RoomManagerTestScene.cs

@@ -1,61 +0,0 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
-// See the LICENCE file in the repository root for full licence text.
-
-using System;
-using osu.Framework.Allocation;
-using osu.Game.Beatmaps;
-using osu.Game.Online.Rooms;
-using osu.Game.Rulesets;
-using osu.Game.Screens.OnlinePlay;
-using osu.Game.Users;
-
-namespace osu.Game.Tests.Visual.Multiplayer
-{
-    public abstract class RoomManagerTestScene : RoomTestScene
-    {
-        [Cached(Type = typeof(IRoomManager))]
-        protected TestRoomManager RoomManager { get; } = new TestRoomManager();
-
-        public override void SetUpSteps()
-        {
-            base.SetUpSteps();
-
-            AddStep("clear rooms", () => RoomManager.Rooms.Clear());
-        }
-
-        protected void AddRooms(int count, RulesetInfo ruleset = null)
-        {
-            AddStep("add rooms", () =>
-            {
-                for (int i = 0; i < count; i++)
-                {
-                    var room = new Room
-                    {
-                        RoomID = { Value = i },
-                        Name = { Value = $"Room {i}" },
-                        Host = { Value = new User { Username = "Host" } },
-                        EndDate = { Value = DateTimeOffset.Now + TimeSpan.FromSeconds(10) },
-                        Category = { Value = i % 2 == 0 ? RoomCategory.Spotlight : RoomCategory.Normal }
-                    };
-
-                    if (ruleset != null)
-                    {
-                        room.Playlist.Add(new PlaylistItem
-                        {
-                            Ruleset = { Value = ruleset },
-                            Beatmap =
-                            {
-                                Value = new BeatmapInfo
-                                {
-                                    Metadata = new BeatmapMetadata()
-                                }
-                            }
-                        });
-                    }
-
-                    RoomManager.Rooms.Add(room);
-                }
-            });
-        }
-    }
-}

osu.Game.Tests/Visual/Multiplayer/TestRoomManager.cs

@@ -1,35 +0,0 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
-// See the LICENCE file in the repository root for full licence text.
-
-using System;
-using osu.Framework.Bindables;
-using osu.Game.Online.Rooms;
-using osu.Game.Screens.OnlinePlay;
-
-namespace osu.Game.Tests.Visual.Multiplayer
-{
-    public class TestRoomManager : IRoomManager
-    {
-        public event Action RoomsUpdated
-        {
-            add { }
-            remove { }
-        }
-
-        public readonly BindableList<Room> Rooms = new BindableList<Room>();
-
-        public IBindable<bool> InitialRoomsReceived { get; } = new Bindable<bool>(true);
-
-        IBindableList<Room> IRoomManager.Rooms => Rooms;
-
-        public void CreateRoom(Room room, Action<Room> onSuccess = null, Action<string> onError = null) => Rooms.Add(room);
-
-        public void JoinRoom(Room room, Action<Room> onSuccess = null, Action<string> onError = null)
-        {
-        }
-
-        public void PartRoom()
-        {
-        }
-    }
-}

osu.Game.Tests/Visual/Multiplayer/TestSceneLoungeRoomInfo.cs

@@ -4,17 +4,21 @@
 using System;
 using NUnit.Framework;
 using osu.Framework.Graphics;
+using osu.Game.Online.Rooms;
 using osu.Game.Online.Rooms.RoomStatuses;
 using osu.Game.Screens.OnlinePlay.Lounge.Components;
+using osu.Game.Tests.Visual.OnlinePlay;
 using osu.Game.Users;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
-    public class TestSceneLoungeRoomInfo : RoomTestScene
+    public class TestSceneLoungeRoomInfo : OnlinePlayTestScene
     {
         [SetUp]
         public new void Setup() => Schedule(() =>
         {
+            SelectedRoom.Value = new Room();
+
             Child = new RoomInfo
             {
                 Anchor = Anchor.Centre,
@@ -23,15 +27,10 @@ namespace osu.Game.Tests.Visual.Multiplayer
             };
         });
 
-        public override void SetUpSteps()
-        {
-            // Todo: Temp
-        }
-
         [Test]
         public void TestNonSelectedRoom()
         {
-            AddStep("set null room", () => Room.RoomID.Value = null);
+            AddStep("set null room", () => SelectedRoom.Value.RoomID.Value = null);
         }
 
         [Test]
@@ -39,11 +38,11 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("set open room", () =>
             {
-                Room.RoomID.Value = 0;
-                Room.Name.Value = "Room 0";
-                Room.Host.Value = new User { Username = "peppy", Id = 2 };
-                Room.EndDate.Value = DateTimeOffset.Now.AddMonths(1);
-                Room.Status.Value = new RoomStatusOpen();
+                SelectedRoom.Value.RoomID.Value = 0;
+                SelectedRoom.Value.Name.Value = "Room 0";
+                SelectedRoom.Value.Host.Value = new User { Username = "peppy", Id = 2 };
+                SelectedRoom.Value.EndDate.Value = DateTimeOffset.Now.AddMonths(1);
+                SelectedRoom.Value.Status.Value = new RoomStatusOpen();
             });
         }
     }

osu.Game.Tests/Visual/Multiplayer/TestSceneLoungeRoomsContainer.cs

@@ -3,24 +3,26 @@
 
 using System.Linq;
 using NUnit.Framework;
-using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Game.Graphics;
 using osu.Game.Online.Rooms;
 using osu.Game.Rulesets.Catch;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.OnlinePlay.Lounge.Components;
+using osu.Game.Tests.Visual.OnlinePlay;
 using osuTK.Graphics;
 using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
-    public class TestSceneLoungeRoomsContainer : RoomManagerTestScene
+    public class TestSceneLoungeRoomsContainer : OnlinePlayTestScene
     {
+        protected new BasicTestRoomManager RoomManager => (BasicTestRoomManager)base.RoomManager;
+
         private RoomsContainer container;
 
-        [BackgroundDependencyLoader]
-        private void load()
+        [SetUp]
+        public new void Setup() => Schedule(() =>
         {
             Child = container = new RoomsContainer
             {
@@ -29,12 +31,12 @@ namespace osu.Game.Tests.Visual.Multiplayer
                 Width = 0.5f,
                 JoinRequested = joinRequested
             };
-        }
+        });
 
         [Test]
         public void TestBasicListChanges()
         {
-            AddRooms(3);
+            AddStep("add rooms", () => RoomManager.AddRooms(3));
 
             AddAssert("has 3 rooms", () => container.Rooms.Count == 3);
             AddStep("remove first room", () => RoomManager.Rooms.Remove(RoomManager.Rooms.FirstOrDefault()));
@@ -51,7 +53,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [Test]
         public void TestKeyboardNavigation()
         {
-            AddRooms(3);
+            AddStep("add rooms", () => RoomManager.AddRooms(3));
 
             AddAssert("no selection", () => checkRoomSelected(null));
 
@@ -72,7 +74,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [Test]
         public void TestClickDeselection()
         {
-            AddRooms(1);
+            AddStep("add room", () => RoomManager.AddRooms(1));
 
             AddAssert("no selection", () => checkRoomSelected(null));
 
@@ -91,7 +93,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [Test]
         public void TestStringFiltering()
         {
-            AddRooms(4);
+            AddStep("add rooms", () => RoomManager.AddRooms(4));
 
             AddUntilStep("4 rooms visible", () => container.Rooms.Count(r => r.IsPresent) == 4);
 
@@ -107,21 +109,21 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [Test]
         public void TestRulesetFiltering()
         {
-            AddRooms(2, new OsuRuleset().RulesetInfo);
-            AddRooms(3, new CatchRuleset().RulesetInfo);
+            AddStep("add rooms", () => RoomManager.AddRooms(2, new OsuRuleset().RulesetInfo));
+            AddStep("add rooms", () => RoomManager.AddRooms(3, new CatchRuleset().RulesetInfo));
 
+            // Todo: What even is this case...?
+            AddStep("set empty filter criteria", () => container.Filter(null));
             AddUntilStep("5 rooms visible", () => container.Rooms.Count(r => r.IsPresent) == 5);
 
             AddStep("filter osu! rooms", () => container.Filter(new FilterCriteria { Ruleset = new OsuRuleset().RulesetInfo }));
-
             AddUntilStep("2 rooms visible", () => container.Rooms.Count(r => r.IsPresent) == 2);
 
             AddStep("filter catch rooms", () => container.Filter(new FilterCriteria { Ruleset = new CatchRuleset().RulesetInfo }));
-
             AddUntilStep("3 rooms visible", () => container.Rooms.Count(r => r.IsPresent) == 3);
         }
 
-        private bool checkRoomSelected(Room room) => Room == room;
+        private bool checkRoomSelected(Room room) => SelectedRoom.Value == room;
 
         private void joinRequested(Room room) => room.Status.Value = new JoinedRoomStatus();
 

osu.Game.Tests/Visual/Multiplayer/TestSceneMatchBeatmapDetailArea.cs

@@ -11,11 +11,12 @@ using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Screens.OnlinePlay.Components;
 using osu.Game.Tests.Beatmaps;
+using osu.Game.Tests.Visual.OnlinePlay;
 using osuTK;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
-    public class TestSceneMatchBeatmapDetailArea : RoomTestScene
+    public class TestSceneMatchBeatmapDetailArea : OnlinePlayTestScene
     {
         [Resolved]
         private BeatmapManager beatmapManager { get; set; }
@@ -26,6 +27,8 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [SetUp]
         public new void Setup() => Schedule(() =>
         {
+            SelectedRoom.Value = new Room();
+
             Child = new MatchBeatmapDetailArea
             {
                 Anchor = Anchor.Centre,
@@ -37,9 +40,9 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
         private void createNewItem()
         {
-            Room.Playlist.Add(new PlaylistItem
+            SelectedRoom.Value.Playlist.Add(new PlaylistItem
             {
-                ID = Room.Playlist.Count,
+                ID = SelectedRoom.Value.Playlist.Count,
                 Beatmap = { Value = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo },
                 Ruleset = { Value = new OsuRuleset().RulesetInfo },
                 RequiredMods =

osu.Game.Tests/Visual/Multiplayer/TestSceneMatchHeader.cs

@@ -7,46 +7,49 @@ using osu.Game.Online.Rooms;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Screens.OnlinePlay.Match.Components;
+using osu.Game.Tests.Visual.OnlinePlay;
 using osu.Game.Users;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
-    public class TestSceneMatchHeader : RoomTestScene
+    public class TestSceneMatchHeader : OnlinePlayTestScene
     {
-        public TestSceneMatchHeader()
-        {
-            Child = new Header();
-        }
-
         [SetUp]
         public new void Setup() => Schedule(() =>
         {
-            Room.Playlist.Add(new PlaylistItem
+            SelectedRoom.Value = new Room
             {
-                Beatmap =
+                Name = { Value = "A very awesome room" },
+                Host = { Value = new User { Id = 2, Username = "peppy" } },
+                Playlist =
                 {
-                    Value = new BeatmapInfo
+                    new PlaylistItem
                     {
-                        Metadata = new BeatmapMetadata
+                        Beatmap =
                         {
-                            Title = "Title",
-                            Artist = "Artist",
-                            AuthorString = "Author",
+                            Value = new BeatmapInfo
+                            {
+                                Metadata = new BeatmapMetadata
+                                {
+                                    Title = "Title",
+                                    Artist = "Artist",
+                                    AuthorString = "Author",
+                                },
+                                Version = "Version",
+                                Ruleset = new OsuRuleset().RulesetInfo
+                            }
                         },
-                        Version = "Version",
-                        Ruleset = new OsuRuleset().RulesetInfo
+                        RequiredMods =
+                        {
+                            new OsuModDoubleTime(),
+                            new OsuModNoFail(),
+                            new OsuModRelax(),
+                        }
                     }
-                },
-                RequiredMods =
-                {
-                    new OsuModDoubleTime(),
-                    new OsuModNoFail(),
-                    new OsuModRelax(),
                 }
-            });
+            };
 
-            Room.Name.Value = "A very awesome room";
-            Room.Host.Value = new User { Id = 2, Username = "peppy" };
+            Child = new Header();
         });
     }
 }

osu.Game.Tests/Visual/Multiplayer/TestSceneMatchLeaderboard.cs

@@ -2,72 +2,74 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Collections.Generic;
-using Newtonsoft.Json;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Game.Online.API;
+using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Online.Rooms;
 using osu.Game.Screens.OnlinePlay.Match.Components;
+using osu.Game.Tests.Visual.OnlinePlay;
 using osu.Game.Users;
 using osuTK;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
-    public class TestSceneMatchLeaderboard : RoomTestScene
+    public class TestSceneMatchLeaderboard : OnlinePlayTestScene
     {
-        protected override bool UseOnlineAPI => true;
-
-        public TestSceneMatchLeaderboard()
-        {
-            Add(new MatchLeaderboard
-            {
-                Origin = Anchor.Centre,
-                Anchor = Anchor.Centre,
-                Size = new Vector2(550f, 450f),
-                Scope = MatchLeaderboardScope.Overall,
-            });
-        }
-
         [BackgroundDependencyLoader]
-        private void load(IAPIProvider api)
+        private void load()
         {
-            var req = new GetRoomScoresRequest();
-            req.Success += v => { };
-            req.Failure += _ => { };
+            ((DummyAPIAccess)API).HandleRequest = r =>
+            {
+                switch (r)
+                {
+                    case GetRoomLeaderboardRequest leaderboardRequest:
+                        leaderboardRequest.TriggerSuccess(new APILeaderboard
+                        {
+                            Leaderboard = new List<APIUserScoreAggregate>
+                            {
+                                new APIUserScoreAggregate
+                                {
+                                    UserID = 2,
+                                    User = new User { Id = 2, Username = "peppy" },
+                                    TotalScore = 995533,
+                                    RoomID = 3,
+                                    CompletedBeatmaps = 1,
+                                    TotalAttempts = 6,
+                                    Accuracy = 0.9851
+                                },
+                                new APIUserScoreAggregate
+                                {
+                                    UserID = 1040328,
+                                    User = new User { Id = 1040328, Username = "smoogipoo" },
+                                    TotalScore = 981100,
+                                    RoomID = 3,
+                                    CompletedBeatmaps = 1,
+                                    TotalAttempts = 9,
+                                    Accuracy = 0.937
+                                }
+                            }
+                        });
+                        return true;
+                }
 
-            api.Queue(req);
+                return false;
+            };
         }
 
         [SetUp]
         public new void Setup() => Schedule(() =>
         {
-            Room.RoomID.Value = 3;
+            SelectedRoom.Value = new Room { RoomID = { Value = 3 } };
+
+            Child = new MatchLeaderboard
+            {
+                Origin = Anchor.Centre,
+                Anchor = Anchor.Centre,
+                Size = new Vector2(550f, 450f),
+                Scope = MatchLeaderboardScope.Overall,
+            };
         });
-
-        private class GetRoomScoresRequest : APIRequest<List<RoomScore>>
-        {
-            protected override string Target => "rooms/3/leaderboard";
-        }
-
-        private class RoomScore
-        {
-            [JsonProperty("user")]
-            public User User { get; set; }
-
-            [JsonProperty("accuracy")]
-            public double Accuracy { get; set; }
-
-            [JsonProperty("total_score")]
-            public int TotalScore { get; set; }
-
-            [JsonProperty("pp")]
-            public double PP { get; set; }
-
-            [JsonProperty("attempts")]
-            public int TotalAttempts { get; set; }
-
-            [JsonProperty("completed")]
-            public int CompletedAttempts { get; set; }
-        }
     }
 }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiSpectatorLeaderboard.cs

@@ -3,74 +3,40 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
 using NUnit.Framework;
-using osu.Framework.Allocation;
-using osu.Framework.Graphics;
-using osu.Framework.Graphics.Containers;
 using osu.Framework.Testing;
 using osu.Framework.Timing;
-using osu.Game.Database;
-using osu.Game.Online.Spectator;
 using osu.Game.Rulesets.Osu.Scoring;
 using osu.Game.Screens.OnlinePlay.Multiplayer.Spectate;
 using osu.Game.Screens.Play.HUD;
-using osu.Game.Tests.Visual.Spectator;
-using osu.Game.Users;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
     public class TestSceneMultiSpectatorLeaderboard : MultiplayerTestScene
     {
-        [Cached(typeof(SpectatorClient))]
-        private TestSpectatorClient spectatorClient = new TestSpectatorClient();
-
-        [Cached(typeof(UserLookupCache))]
-        private UserLookupCache lookupCache = new TestUserLookupCache();
-
-        protected override Container<Drawable> Content => content;
-        private readonly Container content;
-
-        private readonly Dictionary<int, ManualClock> clocks = new Dictionary<int, ManualClock>
-        {
-            { PLAYER_1_ID, new ManualClock() },
-            { PLAYER_2_ID, new ManualClock() }
-        };
-
-        public TestSceneMultiSpectatorLeaderboard()
-        {
-            base.Content.AddRange(new Drawable[]
-            {
-                spectatorClient,
-                lookupCache,
-                content = new Container { RelativeSizeAxes = Axes.Both }
-            });
-        }
+        private Dictionary<int, ManualClock> clocks;
+        private MultiSpectatorLeaderboard leaderboard;
 
         [SetUpSteps]
         public new void SetUpSteps()
         {
-            MultiSpectatorLeaderboard leaderboard = null;
-
             AddStep("reset", () =>
             {
                 Clear();
 
-                foreach (var (userId, clock) in clocks)
+                clocks = new Dictionary<int, ManualClock>
                 {
-                    spectatorClient.EndPlay(userId);
-                    clock.CurrentTime = 0;
-                }
+                    { PLAYER_1_ID, new ManualClock() },
+                    { PLAYER_2_ID, new ManualClock() }
+                };
+
+                foreach (var (userId, _) in clocks)
+                    SpectatorClient.StartPlay(userId, 0);
             });
 
             AddStep("create leaderboard", () =>
             {
-                foreach (var (userId, _) in clocks)
-                    spectatorClient.StartPlay(userId, 0);
-
                 Beatmap.Value = CreateWorkingBeatmap(Ruleset.Value);
-
                 var playable = Beatmap.Value.GetPlayableBeatmap(Ruleset.Value);
                 var scoreProcessor = new OsuScoreProcessor();
                 scoreProcessor.ApplyBeatmap(playable);
@@ -96,10 +62,10 @@ namespace osu.Game.Tests.Visual.Multiplayer
                 // For player 2, send frames in sets of 10.
                 for (int i = 0; i < 100; i++)
                 {
-                    spectatorClient.SendFrames(PLAYER_1_ID, i, 1);
+                    SpectatorClient.SendFrames(PLAYER_1_ID, 1);
 
                     if (i % 10 == 0)
-                        spectatorClient.SendFrames(PLAYER_2_ID, i, 10);
+                        SpectatorClient.SendFrames(PLAYER_2_ID, 10);
                 }
             });
 
@@ -145,17 +111,5 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
         private void assertCombo(int userId, int expectedCombo)
             => AddUntilStep($"player {userId} has {expectedCombo} combo", () => this.ChildrenOfType<GameplayLeaderboardScore>().Single(s => s.User?.Id == userId).Combo.Value == expectedCombo);
-
-        private class TestUserLookupCache : UserLookupCache
-        {
-            protected override Task<User> ComputeValueAsync(int lookup, CancellationToken token = default)
-            {
-                return Task.FromResult(new User
-                {
-                    Id = lookup,
-                    Username = $"User {lookup}"
-                });
-            }
-        }
     }
 }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiSpectatorScreen.cs

@@ -3,31 +3,20 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Testing;
 using osu.Game.Beatmaps;
-using osu.Game.Database;
-using osu.Game.Online.Spectator;
+using osu.Game.Rulesets.UI;
 using osu.Game.Screens.OnlinePlay.Multiplayer.Spectate;
 using osu.Game.Screens.Play;
 using osu.Game.Tests.Beatmaps.IO;
-using osu.Game.Tests.Visual.Spectator;
-using osu.Game.Users;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
     public class TestSceneMultiSpectatorScreen : MultiplayerTestScene
     {
-        [Cached(typeof(SpectatorClient))]
-        private TestSpectatorClient spectatorClient = new TestSpectatorClient();
-
-        [Cached(typeof(UserLookupCache))]
-        private UserLookupCache lookupCache = new TestUserLookupCache();
-
         [Resolved]
         private OsuGameBase game { get; set; }
 
@@ -37,7 +26,6 @@ namespace osu.Game.Tests.Visual.Multiplayer
         private MultiSpectatorScreen spectatorScreen;
 
         private readonly List<int> playingUserIds = new List<int>();
-        private readonly Dictionary<int, int> nextFrame = new Dictionary<int, int>();
 
         private BeatmapSetInfo importedSet;
         private BeatmapInfo importedBeatmap;
@@ -51,25 +39,8 @@ namespace osu.Game.Tests.Visual.Multiplayer
             importedBeatmapId = importedBeatmap.OnlineBeatmapID ?? -1;
         }
 
-        public override void SetUpSteps()
-        {
-            base.SetUpSteps();
-
-            AddStep("reset sent frames", () => nextFrame.Clear());
-
-            AddStep("add streaming client", () =>
-            {
-                Remove(spectatorClient);
-                Add(spectatorClient);
-            });
-
-            AddStep("finish previous gameplay", () =>
-            {
-                foreach (var id in playingUserIds)
-                    spectatorClient.EndPlay(id);
-                playingUserIds.Clear();
-            });
-        }
+        [SetUp]
+        public new void Setup() => Schedule(() => playingUserIds.Clear());
 
         [Test]
         public void TestDelayedStart()
@@ -80,18 +51,16 @@ namespace osu.Game.Tests.Visual.Multiplayer
                 Client.CurrentMatchPlayingUserIds.Add(PLAYER_2_ID);
                 playingUserIds.Add(PLAYER_1_ID);
                 playingUserIds.Add(PLAYER_2_ID);
-                nextFrame[PLAYER_1_ID] = 0;
-                nextFrame[PLAYER_2_ID] = 0;
             });
 
             loadSpectateScreen(false);
 
             AddWaitStep("wait a bit", 10);
-            AddStep("load player first_player_id", () => spectatorClient.StartPlay(PLAYER_1_ID, importedBeatmapId));
+            AddStep("load player first_player_id", () => SpectatorClient.StartPlay(PLAYER_1_ID, importedBeatmapId));
             AddUntilStep("one player added", () => spectatorScreen.ChildrenOfType<Player>().Count() == 1);
 
             AddWaitStep("wait a bit", 10);
-            AddStep("load player second_player_id", () => spectatorClient.StartPlay(PLAYER_2_ID, importedBeatmapId));
+            AddStep("load player second_player_id", () => SpectatorClient.StartPlay(PLAYER_2_ID, importedBeatmapId));
             AddUntilStep("two players added", () => spectatorScreen.ChildrenOfType<Player>().Count() == 2);
         }
 
@@ -107,6 +76,23 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddWaitStep("wait a bit", 20);
         }
 
+        [Test]
+        public void TestTimeDoesNotProgressWhileAllPlayersPaused()
+        {
+            start(new[] { PLAYER_1_ID, PLAYER_2_ID });
+            loadSpectateScreen();
+
+            sendFrames(PLAYER_1_ID, 40);
+            sendFrames(PLAYER_2_ID, 20);
+
+            checkPaused(PLAYER_2_ID, true);
+            checkPausedInstant(PLAYER_1_ID, false);
+            AddAssert("master clock still running", () => this.ChildrenOfType<MasterGameplayClockContainer>().Single().IsRunning);
+
+            checkPaused(PLAYER_1_ID, true);
+            AddUntilStep("master clock paused", () => !this.ChildrenOfType<MasterGameplayClockContainer>().Single().IsRunning);
+        }
+
         [Test]
         public void TestPlayersMustStartSimultaneously()
         {
@@ -182,7 +168,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
             // Send initial frames for both players. A few more for player 1.
             sendFrames(PLAYER_1_ID, 1000);
-            sendFrames(PLAYER_2_ID, 10);
+            sendFrames(PLAYER_2_ID, 30);
             checkPausedInstant(PLAYER_1_ID, false);
             checkPausedInstant(PLAYER_2_ID, false);
 
@@ -210,8 +196,8 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
             sendFrames(PLAYER_1_ID, 10);
             sendFrames(PLAYER_2_ID, 20);
-            assertMuted(PLAYER_1_ID, false);
-            assertMuted(PLAYER_2_ID, true);
+            checkPaused(PLAYER_1_ID, false);
+            assertOneNotMuted();
 
             checkPaused(PLAYER_1_ID, true);
             assertMuted(PLAYER_1_ID, true);
@@ -229,6 +215,36 @@ namespace osu.Game.Tests.Visual.Multiplayer
             assertMuted(PLAYER_2_ID, true);
         }
 
+        [Test]
+        public void TestSpectatingDuringGameplay()
+        {
+            var players = new[] { PLAYER_1_ID, PLAYER_2_ID };
+
+            start(players);
+            sendFrames(players, 300);
+
+            loadSpectateScreen();
+            sendFrames(players, 300);
+
+            AddUntilStep("playing from correct point in time", () => this.ChildrenOfType<DrawableRuleset>().All(r => r.FrameStableClock.CurrentTime > 30000));
+        }
+
+        [Test]
+        public void TestSpectatingDuringGameplayWithLateFrames()
+        {
+            start(new[] { PLAYER_1_ID, PLAYER_2_ID });
+            sendFrames(new[] { PLAYER_1_ID, PLAYER_2_ID }, 300);
+
+            loadSpectateScreen();
+            sendFrames(PLAYER_1_ID, 300);
+
+            AddWaitStep("wait maximum start delay seconds", (int)(CatchUpSyncManager.MAXIMUM_START_DELAY / TimePerAction));
+            checkPaused(PLAYER_1_ID, false);
+
+            sendFrames(PLAYER_2_ID, 300);
+            AddUntilStep("player 2 playing from correct point in time", () => getPlayer(PLAYER_2_ID).ChildrenOfType<DrawableRuleset>().Single().FrameStableClock.CurrentTime > 30000);
+        }
+
         private void loadSpectateScreen(bool waitForPlayerLoad = true)
         {
             AddStep("load screen", () =>
@@ -242,8 +258,6 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddUntilStep("wait for screen load", () => spectatorScreen.LoadState == LoadState.Loaded && (!waitForPlayerLoad || spectatorScreen.AllPlayersLoaded));
         }
 
-        private void start(int userId, int? beatmapId = null) => start(new[] { userId }, beatmapId);
-
         private void start(int[] userIds, int? beatmapId = null)
         {
             AddStep("start play", () =>
@@ -251,23 +265,12 @@ namespace osu.Game.Tests.Visual.Multiplayer
                 foreach (int id in userIds)
                 {
                     Client.CurrentMatchPlayingUserIds.Add(id);
-                    spectatorClient.StartPlay(id, beatmapId ?? importedBeatmapId);
+                    SpectatorClient.StartPlay(id, beatmapId ?? importedBeatmapId);
                     playingUserIds.Add(id);
-                    nextFrame[id] = 0;
                 }
             });
         }
 
-        private void finish(int userId)
-        {
-            AddStep("end play", () =>
-            {
-                spectatorClient.EndPlay(userId);
-                playingUserIds.Remove(userId);
-                nextFrame.Remove(userId);
-            });
-        }
-
         private void sendFrames(int userId, int count = 10) => sendFrames(new[] { userId }, count);
 
         private void sendFrames(int[] userIds, int count = 10)
@@ -275,10 +278,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddStep("send frames", () =>
             {
                 foreach (int id in userIds)
-                {
-                    spectatorClient.SendFrames(id, nextFrame[id], count);
-                    nextFrame[id] += count;
-                }
+                    SpectatorClient.SendFrames(id, count);
             });
         }
 
@@ -286,7 +286,14 @@ namespace osu.Game.Tests.Visual.Multiplayer
             => AddUntilStep($"{userId} is {(state ? "paused" : "playing")}", () => getPlayer(userId).ChildrenOfType<GameplayClockContainer>().First().GameplayClock.IsRunning != state);
 
         private void checkPausedInstant(int userId, bool state)
-            => AddAssert($"{userId} is {(state ? "paused" : "playing")}", () => getPlayer(userId).ChildrenOfType<GameplayClockContainer>().First().GameplayClock.IsRunning != state);
+        {
+            checkPaused(userId, state);
+
+            // Todo: The following should work, but is broken because SpectatorScreen retrieves the WorkingBeatmap via the BeatmapManager, bypassing the test scene clock and running real-time.
+            // AddAssert($"{userId} is {(state ? "paused" : "playing")}", () => getPlayer(userId).ChildrenOfType<GameplayClockContainer>().First().GameplayClock.IsRunning != state);
+        }
+
+        private void assertOneNotMuted() => AddAssert("one player not muted", () => spectatorScreen.ChildrenOfType<PlayerArea>().Count(p => !p.Mute) == 1);
 
         private void assertMuted(int userId, bool muted)
             => AddAssert($"{userId} {(muted ? "is" : "is not")} muted", () => getInstance(userId).Mute == muted);
@@ -297,17 +304,5 @@ namespace osu.Game.Tests.Visual.Multiplayer
         private Player getPlayer(int userId) => getInstance(userId).ChildrenOfType<Player>().Single();
 
         private PlayerArea getInstance(int userId) => spectatorScreen.ChildrenOfType<PlayerArea>().Single(p => p.UserId == userId);
-
-        internal class TestUserLookupCache : UserLookupCache
-        {
-            protected override Task<User> ComputeValueAsync(int lookup, CancellationToken token = default)
-            {
-                return Task.FromResult(new User
-                {
-                    Id = lookup,
-                    Username = $"User {lookup}"
-                });
-            }
-        }
     }
 }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayer.cs

@@ -18,6 +18,7 @@ using osu.Game.Overlays.Mods;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
+using osu.Game.Screens;
 using osu.Game.Screens.OnlinePlay.Components;
 using osu.Game.Screens.OnlinePlay.Match.Components;
 using osu.Game.Screens.OnlinePlay.Multiplayer;
@@ -30,14 +31,13 @@ namespace osu.Game.Tests.Visual.Multiplayer
 {
     public class TestSceneMultiplayer : ScreenTestScene
     {
-        private TestMultiplayer multiplayerScreen;
-
         private BeatmapManager beatmaps;
         private RulesetStore rulesets;
         private BeatmapSetInfo importedSet;
 
-        private TestMultiplayerClient client => multiplayerScreen.Client;
-        private Room room => client.APIRoom;
+        private DependenciesScreen dependenciesScreen;
+        private TestMultiplayer multiplayerScreen;
+        private TestMultiplayerClient client;
 
         public TestSceneMultiplayer()
         {
@@ -229,30 +229,43 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
         private void loadMultiplayer()
         {
-            AddStep("show", () =>
+            AddStep("create multiplayer screen", () => multiplayerScreen = new TestMultiplayer());
+
+            AddStep("load dependencies", () =>
             {
-                multiplayerScreen = new TestMultiplayer();
+                client = new TestMultiplayerClient(multiplayerScreen.RoomManager);
 
-                // Needs to be added at a higher level since the multiplayer screen becomes non-current.
-                Child = multiplayerScreen.Client;
+                // The screen gets suspended so it stops receiving updates.
+                Child = client;
 
-                LoadScreen(multiplayerScreen);
+                LoadScreen(dependenciesScreen = new DependenciesScreen(client));
             });
 
-            AddUntilStep("wait for loaded", () => multiplayerScreen.IsLoaded);
+            AddUntilStep("wait for dependencies to load", () => dependenciesScreen.IsLoaded);
+
+            AddStep("load multiplayer", () => LoadScreen(multiplayerScreen));
+            AddUntilStep("wait for multiplayer to load", () => multiplayerScreen.IsLoaded);
         }
 
-        private class TestMultiplayer : Screens.OnlinePlay.Multiplayer.Multiplayer
+        /// <summary>
+        /// Used for the sole purpose of adding <see cref="TestMultiplayerClient"/> as a resolvable dependency.
+        /// </summary>
+        private class DependenciesScreen : OsuScreen
         {
             [Cached(typeof(MultiplayerClient))]
             public readonly TestMultiplayerClient Client;
 
-            public TestMultiplayer()
+            public DependenciesScreen(TestMultiplayerClient client)
             {
-                Client = new TestMultiplayerClient((TestMultiplayerRoomManager)RoomManager);
+                Client = client;
             }
+        }
 
-            protected override RoomManager CreateRoomManager() => new TestMultiplayerRoomManager();
+        private class TestMultiplayer : Screens.OnlinePlay.Multiplayer.Multiplayer
+        {
+            public new TestMultiplayerRoomManager RoomManager { get; private set; }
+
+            protected override RoomManager CreateRoomManager() => RoomManager = new TestMultiplayerRoomManager();
         }
     }
 }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerGameplayLeaderboard.cs

@@ -6,12 +6,11 @@ using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Extensions.ObjectExtensions;
 using osu.Framework.Graphics;
-using osu.Framework.Graphics.Containers;
 using osu.Framework.Testing;
 using osu.Framework.Utils;
 using osu.Game.Configuration;
-using osu.Game.Database;
 using osu.Game.Online.API;
 using osu.Game.Online.Spectator;
 using osu.Game.Replays.Legacy;
@@ -19,37 +18,20 @@ using osu.Game.Rulesets.Osu.Scoring;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
 using osu.Game.Screens.Play.HUD;
-using osu.Game.Tests.Visual.Online;
+using osu.Game.Tests.Visual.OnlinePlay;
 using osu.Game.Tests.Visual.Spectator;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
     public class TestSceneMultiplayerGameplayLeaderboard : MultiplayerTestScene
     {
-        private const int users = 16;
+        private static IEnumerable<int> users => Enumerable.Range(0, 16);
 
-        [Cached(typeof(SpectatorClient))]
-        private TestMultiplayerSpectatorClient spectatorClient = new TestMultiplayerSpectatorClient();
-
-        [Cached(typeof(UserLookupCache))]
-        private UserLookupCache lookupCache = new TestSceneCurrentlyPlayingDisplay.TestUserLookupCache();
+        public new TestMultiplayerSpectatorClient SpectatorClient => (TestMultiplayerSpectatorClient)OnlinePlayDependencies?.SpectatorClient;
 
         private MultiplayerGameplayLeaderboard leaderboard;
-
-        protected override Container<Drawable> Content { get; } = new Container { RelativeSizeAxes = Axes.Both };
-
         private OsuConfigManager config;
 
-        public TestSceneMultiplayerGameplayLeaderboard()
-        {
-            base.Content.Children = new Drawable[]
-            {
-                spectatorClient,
-                lookupCache,
-                Content
-            };
-        }
-
         [BackgroundDependencyLoader]
         private void load()
         {
@@ -59,7 +41,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [SetUpSteps]
         public override void SetUpSteps()
         {
-            AddStep("set local user", () => ((DummyAPIAccess)API).LocalUser.Value = lookupCache.GetUserAsync(1).Result);
+            AddStep("set local user", () => ((DummyAPIAccess)API).LocalUser.Value = LookupCache.GetUserAsync(1).Result);
 
             AddStep("create leaderboard", () =>
             {
@@ -70,14 +52,11 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
                 var playable = Beatmap.Value.GetPlayableBeatmap(Ruleset.Value);
 
-                for (int i = 0; i < users; i++)
-                    spectatorClient.StartPlay(i, Beatmap.Value.BeatmapInfo.OnlineBeatmapID ?? 0);
+                foreach (var user in users)
+                    SpectatorClient.StartPlay(user, Beatmap.Value.BeatmapInfo.OnlineBeatmapID ?? 0);
 
-                spectatorClient.Schedule(() =>
-                {
-                    Client.CurrentMatchPlayingUserIds.Clear();
-                    Client.CurrentMatchPlayingUserIds.AddRange(spectatorClient.PlayingUsers);
-                });
+                // Todo: This is REALLY bad.
+                Client.CurrentMatchPlayingUserIds.AddRange(users);
 
                 Children = new Drawable[]
                 {
@@ -86,7 +65,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
                 scoreProcessor.ApplyBeatmap(playable);
 
-                LoadComponentAsync(leaderboard = new MultiplayerGameplayLeaderboard(scoreProcessor, spectatorClient.PlayingUsers.ToArray())
+                LoadComponentAsync(leaderboard = new MultiplayerGameplayLeaderboard(scoreProcessor, users.ToArray())
                 {
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,
@@ -100,24 +79,32 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [Test]
         public void TestScoreUpdates()
         {
-            AddRepeatStep("update state", () => spectatorClient.RandomlyUpdateState(), 100);
+            AddRepeatStep("update state", () => SpectatorClient.RandomlyUpdateState(), 100);
             AddToggleStep("switch compact mode", expanded => leaderboard.Expanded.Value = expanded);
         }
 
         [Test]
         public void TestUserQuit()
         {
-            AddRepeatStep("mark user quit", () => Client.CurrentMatchPlayingUserIds.RemoveAt(0), users);
+            foreach (var user in users)
+                AddStep($"mark user {user} quit", () => Client.RemoveUser(LookupCache.GetUserAsync(user).Result.AsNonNull()));
         }
 
         [Test]
         public void TestChangeScoringMode()
         {
-            AddRepeatStep("update state", () => spectatorClient.RandomlyUpdateState(), 5);
+            AddRepeatStep("update state", () => SpectatorClient.RandomlyUpdateState(), 5);
             AddStep("change to classic", () => config.SetValue(OsuSetting.ScoreDisplayMode, ScoringMode.Classic));
             AddStep("change to standardised", () => config.SetValue(OsuSetting.ScoreDisplayMode, ScoringMode.Standardised));
         }
 
+        protected override OnlinePlayTestSceneDependencies CreateOnlinePlayDependencies() => new TestDependencies();
+
+        protected class TestDependencies : MultiplayerTestSceneDependencies
+        {
+            protected override TestSpectatorClient CreateSpectatorClient() => new TestMultiplayerSpectatorClient();
+        }
+
         public class TestMultiplayerSpectatorClient : TestSpectatorClient
         {
             private readonly Dictionary<int, FrameHeader> lastHeaders = new Dictionary<int, FrameHeader>();

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchFooter.cs

@@ -1,7 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using osu.Framework.Allocation;
+using NUnit.Framework;
 using osu.Framework.Graphics;
 using osu.Game.Online.Rooms;
 using osu.Game.Screens.OnlinePlay.Multiplayer.Match;
@@ -10,18 +10,17 @@ namespace osu.Game.Tests.Visual.Multiplayer
 {
     public class TestSceneMultiplayerMatchFooter : MultiplayerTestScene
     {
-        [Cached]
-        private readonly OnlinePlayBeatmapAvailabilityTracker availablilityTracker = new OnlinePlayBeatmapAvailabilityTracker();
-
-        [BackgroundDependencyLoader]
-        private void load()
+        [SetUp]
+        public new void Setup() => Schedule(() =>
         {
+            SelectedRoom.Value = new Room();
+
             Child = new MultiplayerMatchFooter
             {
                 Anchor = Anchor.Centre,
                 Origin = Anchor.Centre,
                 Height = 50
             };
-        }
+        });
     }
 }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSongSelect.cs

@@ -29,7 +29,7 @@ using osu.Game.Screens.Select;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
-    public class TestSceneMultiplayerMatchSongSelect : RoomTestScene
+    public class TestSceneMultiplayerMatchSongSelect : MultiplayerTestScene
     {
         private BeatmapManager manager;
         private RulesetStore rulesets;

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerMatchSubScreen.cs

@@ -49,13 +49,13 @@ namespace osu.Game.Tests.Visual.Multiplayer
         [SetUp]
         public new void Setup() => Schedule(() =>
         {
-            Room.Name.Value = "Test Room";
+            SelectedRoom.Value = new Room { Name = { Value = "Test Room" } };
         });
 
         [SetUpSteps]
         public void SetupSteps()
         {
-            AddStep("load match", () => LoadScreen(screen = new MultiplayerMatchSubScreen(Room)));
+            AddStep("load match", () => LoadScreen(screen = new MultiplayerMatchSubScreen(SelectedRoom.Value)));
             AddUntilStep("wait for load", () => screen.IsCurrentScreen());
         }
 
@@ -66,7 +66,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
             AddStep("set playlist", () =>
             {
-                Room.Playlist.Add(new PlaylistItem
+                SelectedRoom.Value.Playlist.Add(new PlaylistItem
                 {
                     Beatmap = { Value = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo },
                     Ruleset = { Value = new OsuRuleset().RulesetInfo },
@@ -81,7 +81,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("set playlist", () =>
             {
-                Room.Playlist.Add(new PlaylistItem
+                SelectedRoom.Value.Playlist.Add(new PlaylistItem
                 {
                     Beatmap = { Value = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo },
                     Ruleset = { Value = new OsuRuleset().RulesetInfo },
@@ -102,7 +102,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("set playlist", () =>
             {
-                Room.Playlist.Add(new PlaylistItem
+                SelectedRoom.Value.Playlist.Add(new PlaylistItem
                 {
                     Beatmap = { Value = beatmaps.GetWorkingBeatmap(importedSet.Beatmaps.First()).BeatmapInfo },
                     Ruleset = { Value = new OsuRuleset().RulesetInfo },

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerParticipantsList.cs

@@ -22,8 +22,11 @@ namespace osu.Game.Tests.Visual.Multiplayer
 {
     public class TestSceneMultiplayerParticipantsList : MultiplayerTestScene
     {
-        [SetUp]
-        public new void Setup() => Schedule(createNewParticipantsList);
+        [SetUpSteps]
+        public void SetupSteps()
+        {
+            createNewParticipantsList();
+        }
 
         [Test]
         public void TestAddUser()
@@ -88,7 +91,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         public void TestCorrectInitialState()
         {
             AddStep("set to downloading map", () => Client.ChangeBeatmapAvailability(BeatmapAvailability.Downloading(0)));
-            AddStep("recreate list", createNewParticipantsList);
+            createNewParticipantsList();
             checkProgressBarVisibility(true);
         }
 
@@ -233,7 +236,17 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
         private void createNewParticipantsList()
         {
-            Child = new ParticipantsList { Anchor = Anchor.Centre, Origin = Anchor.Centre, RelativeSizeAxes = Axes.Y, Size = new Vector2(380, 0.7f) };
+            ParticipantsList participantsList = null;
+
+            AddStep("create new list", () => Child = participantsList = new ParticipantsList
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                RelativeSizeAxes = Axes.Y,
+                Size = new Vector2(380, 0.7f)
+            });
+
+            AddUntilStep("wait for list to load", () => participantsList.IsLoaded);
         }
 
         private void checkProgressBarVisibility(bool visible) =>

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerReadyButton.cs

@@ -27,7 +27,6 @@ namespace osu.Game.Tests.Visual.Multiplayer
     public class TestSceneMultiplayerReadyButton : MultiplayerTestScene
     {
         private MultiplayerReadyButton button;
-        private OnlinePlayBeatmapAvailabilityTracker beatmapTracker;
         private BeatmapSetInfo importedSet;
 
         private readonly Bindable<PlaylistItem> selectedItem = new Bindable<PlaylistItem>();
@@ -43,18 +42,13 @@ namespace osu.Game.Tests.Visual.Multiplayer
             Dependencies.Cache(rulesets = new RulesetStore(ContextFactory));
             Dependencies.Cache(beatmaps = new BeatmapManager(LocalStorage, ContextFactory, rulesets, null, audio, Resources, host, Beatmap.Default));
             beatmaps.Import(TestResources.GetQuickTestBeatmapForImport()).Wait();
-
-            Add(beatmapTracker = new OnlinePlayBeatmapAvailabilityTracker
-            {
-                SelectedItem = { BindTarget = selectedItem }
-            });
-
-            Dependencies.Cache(beatmapTracker);
         }
 
         [SetUp]
         public new void Setup() => Schedule(() =>
         {
+            AvailabilityTracker.SelectedItem.BindTo(selectedItem);
+
             importedSet = beatmaps.GetAllUsableBeatmapSetsEnumerable(IncludedDetails.All).First();
             Beatmap.Value = beatmaps.GetWorkingBeatmap(importedSet.Beatmaps.First());
             selectedItem.Value = new PlaylistItem

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerRoomManager.cs

@@ -3,37 +3,38 @@
 
 using System;
 using NUnit.Framework;
-using osu.Framework.Graphics;
 using osu.Framework.Testing;
 using osu.Game.Online.Rooms;
 using osu.Game.Screens.OnlinePlay.Components;
 using osu.Game.Tests.Beatmaps;
+using osu.Game.Tests.Visual.OnlinePlay;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
     [HeadlessTest]
-    public class TestSceneMultiplayerRoomManager : RoomTestScene
+    public class TestSceneMultiplayerRoomManager : MultiplayerTestScene
     {
-        private TestMultiplayerRoomContainer roomContainer;
-        private TestMultiplayerRoomManager roomManager => roomContainer.RoomManager;
+        protected override OnlinePlayTestSceneDependencies CreateOnlinePlayDependencies() => new TestDependencies();
+
+        public TestSceneMultiplayerRoomManager()
+            : base(false)
+        {
+        }
 
         [Test]
         public void TestPollsInitially()
         {
             AddStep("create room manager with a few rooms", () =>
             {
-                createRoomManager().With(d => d.OnLoadComplete += _ =>
-                {
-                    roomManager.CreateRoom(createRoom(r => r.Name.Value = "1"));
-                    roomManager.PartRoom();
-                    roomManager.CreateRoom(createRoom(r => r.Name.Value = "2"));
-                    roomManager.PartRoom();
-                    roomManager.ClearRooms();
-                });
+                RoomManager.CreateRoom(createRoom(r => r.Name.Value = "1"));
+                RoomManager.PartRoom();
+                RoomManager.CreateRoom(createRoom(r => r.Name.Value = "2"));
+                RoomManager.PartRoom();
+                RoomManager.ClearRooms();
             });
 
-            AddAssert("manager polled for rooms", () => ((RoomManager)roomManager).Rooms.Count == 2);
-            AddAssert("initial rooms received", () => roomManager.InitialRoomsReceived.Value);
+            AddAssert("manager polled for rooms", () => ((RoomManager)RoomManager).Rooms.Count == 2);
+            AddAssert("initial rooms received", () => RoomManager.InitialRoomsReceived.Value);
         }
 
         [Test]
@@ -41,19 +42,16 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("create room manager with a few rooms", () =>
             {
-                createRoomManager().With(d => d.OnLoadComplete += _ =>
-                {
-                    roomManager.CreateRoom(createRoom());
-                    roomManager.PartRoom();
-                    roomManager.CreateRoom(createRoom());
-                    roomManager.PartRoom();
-                });
+                RoomManager.CreateRoom(createRoom());
+                RoomManager.PartRoom();
+                RoomManager.CreateRoom(createRoom());
+                RoomManager.PartRoom();
             });
 
-            AddStep("disconnect", () => roomContainer.Client.Disconnect());
+            AddStep("disconnect", () => Client.Disconnect());
 
-            AddAssert("rooms cleared", () => ((RoomManager)roomManager).Rooms.Count == 0);
-            AddAssert("initial rooms not received", () => !roomManager.InitialRoomsReceived.Value);
+            AddAssert("rooms cleared", () => ((RoomManager)RoomManager).Rooms.Count == 0);
+            AddAssert("initial rooms not received", () => !RoomManager.InitialRoomsReceived.Value);
         }
 
         [Test]
@@ -61,20 +59,17 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("create room manager with a few rooms", () =>
             {
-                createRoomManager().With(d => d.OnLoadComplete += _ =>
-                {
-                    roomManager.CreateRoom(createRoom());
-                    roomManager.PartRoom();
-                    roomManager.CreateRoom(createRoom());
-                    roomManager.PartRoom();
-                });
+                RoomManager.CreateRoom(createRoom());
+                RoomManager.PartRoom();
+                RoomManager.CreateRoom(createRoom());
+                RoomManager.PartRoom();
             });
 
-            AddStep("disconnect", () => roomContainer.Client.Disconnect());
-            AddStep("connect", () => roomContainer.Client.Connect());
+            AddStep("disconnect", () => Client.Disconnect());
+            AddStep("connect", () => Client.Connect());
 
-            AddAssert("manager polled for rooms", () => ((RoomManager)roomManager).Rooms.Count == 2);
-            AddAssert("initial rooms received", () => roomManager.InitialRoomsReceived.Value);
+            AddAssert("manager polled for rooms", () => ((RoomManager)RoomManager).Rooms.Count == 2);
+            AddAssert("initial rooms received", () => RoomManager.InitialRoomsReceived.Value);
         }
 
         [Test]
@@ -82,15 +77,12 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("create room manager with a room", () =>
             {
-                createRoomManager().With(d => d.OnLoadComplete += _ =>
-                {
-                    roomManager.CreateRoom(createRoom());
-                    roomManager.ClearRooms();
-                });
+                RoomManager.CreateRoom(createRoom());
+                RoomManager.ClearRooms();
             });
 
-            AddAssert("manager not polled for rooms", () => ((RoomManager)roomManager).Rooms.Count == 0);
-            AddAssert("initial rooms not received", () => !roomManager.InitialRoomsReceived.Value);
+            AddAssert("manager not polled for rooms", () => ((RoomManager)RoomManager).Rooms.Count == 0);
+            AddAssert("initial rooms not received", () => !RoomManager.InitialRoomsReceived.Value);
         }
 
         [Test]
@@ -98,13 +90,10 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("create room manager with a room", () =>
             {
-                createRoomManager().With(d => d.OnLoadComplete += _ =>
-                {
-                    roomManager.CreateRoom(createRoom());
-                });
+                RoomManager.CreateRoom(createRoom());
             });
 
-            AddUntilStep("multiplayer room joined", () => roomContainer.Client.Room != null);
+            AddUntilStep("multiplayer room joined", () => Client.Room != null);
         }
 
         [Test]
@@ -112,14 +101,11 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("create room manager with a room", () =>
             {
-                createRoomManager().With(d => d.OnLoadComplete += _ =>
-                {
-                    roomManager.CreateRoom(createRoom());
-                    roomManager.PartRoom();
-                });
+                RoomManager.CreateRoom(createRoom());
+                RoomManager.PartRoom();
             });
 
-            AddAssert("multiplayer room parted", () => roomContainer.Client.Room == null);
+            AddAssert("multiplayer room parted", () => Client.Room == null);
         }
 
         [Test]
@@ -127,16 +113,13 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("create room manager with a room", () =>
             {
-                createRoomManager().With(d => d.OnLoadComplete += _ =>
-                {
-                    var r = createRoom();
-                    roomManager.CreateRoom(r);
-                    roomManager.PartRoom();
-                    roomManager.JoinRoom(r);
-                });
+                var r = createRoom();
+                RoomManager.CreateRoom(r);
+                RoomManager.PartRoom();
+                RoomManager.JoinRoom(r);
             });
 
-            AddUntilStep("multiplayer room joined", () => roomContainer.Client.Room != null);
+            AddUntilStep("multiplayer room joined", () => Client.Room != null);
         }
 
         private Room createRoom(Action<Room> initFunc = null)
@@ -161,18 +144,14 @@ namespace osu.Game.Tests.Visual.Multiplayer
             return room;
         }
 
-        private TestMultiplayerRoomManager createRoomManager()
+        private class TestDependencies : MultiplayerTestSceneDependencies
         {
-            Child = roomContainer = new TestMultiplayerRoomContainer
+            public TestDependencies()
             {
-                RoomManager =
-                {
-                    TimeBetweenListingPolls = { Value = 1 },
-                    TimeBetweenSelectionPolls = { Value = 1 }
-                }
-            };
-
-            return roomManager;
+                // Need to set these values as early as possible.
+                RoomManager.TimeBetweenListingPolls.Value = 1;
+                RoomManager.TimeBetweenSelectionPolls.Value = 1;
+            }
         }
     }
 }

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiplayerSpectateButton.cs

@@ -37,40 +37,19 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
         private IDisposable readyClickOperation;
 
-        protected override Container<Drawable> Content => content;
-        private readonly Container content;
-
-        public TestSceneMultiplayerSpectateButton()
-        {
-            base.Content.Add(content = new Container
-            {
-                RelativeSizeAxes = Axes.Both
-            });
-        }
-
-        protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
-        {
-            var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
-
-            return dependencies;
-        }
-
         [BackgroundDependencyLoader]
         private void load(GameHost host, AudioManager audio)
         {
             Dependencies.Cache(rulesets = new RulesetStore(ContextFactory));
             Dependencies.Cache(beatmaps = new BeatmapManager(LocalStorage, ContextFactory, rulesets, null, audio, Resources, host, Beatmap.Default));
-
-            var beatmapTracker = new OnlinePlayBeatmapAvailabilityTracker { SelectedItem = { BindTarget = selectedItem } };
-            base.Content.Add(beatmapTracker);
-            Dependencies.Cache(beatmapTracker);
-
             beatmaps.Import(TestResources.GetQuickTestBeatmapForImport()).Wait();
         }
 
         [SetUp]
         public new void Setup() => Schedule(() =>
         {
+            AvailabilityTracker.SelectedItem.BindTo(selectedItem);
+
             importedSet = beatmaps.GetAllUsableBeatmapSetsEnumerable(IncludedDetails.All).First();
             Beatmap.Value = beatmaps.GetWorkingBeatmap(importedSet.Beatmaps.First());
             selectedItem.Value = new PlaylistItem

osu.Game.Tests/Visual/Multiplayer/TestScenePlaylistsSongSelect.cs

@@ -14,16 +14,18 @@ using osu.Framework.Platform;
 using osu.Framework.Screens;
 using osu.Framework.Utils;
 using osu.Game.Beatmaps;
+using osu.Game.Online.Rooms;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Screens.OnlinePlay.Components;
 using osu.Game.Screens.OnlinePlay.Playlists;
+using osu.Game.Tests.Visual.OnlinePlay;
 
 namespace osu.Game.Tests.Visual.Multiplayer
 {
-    public class TestScenePlaylistsSongSelect : RoomTestScene
+    public class TestScenePlaylistsSongSelect : OnlinePlayTestScene
     {
         [Resolved]
         private BeatmapManager beatmapManager { get; set; }
@@ -85,6 +87,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
 
             AddStep("reset", () =>
             {
+                SelectedRoom.Value = new Room();
                 Ruleset.Value = new OsuRuleset().RulesetInfo;
                 Beatmap.SetDefault();
                 SelectedMods.Value = Array.Empty<Mod>();
@@ -98,14 +101,14 @@ namespace osu.Game.Tests.Visual.Multiplayer
         public void TestItemAddedIfEmptyOnStart()
         {
             AddStep("finalise selection", () => songSelect.FinaliseSelection());
-            AddAssert("playlist has 1 item", () => Room.Playlist.Count == 1);
+            AddAssert("playlist has 1 item", () => SelectedRoom.Value.Playlist.Count == 1);
         }
 
         [Test]
         public void TestItemAddedWhenCreateNewItemClicked()
         {
             AddStep("create new item", () => songSelect.BeatmapDetails.CreateNewItem());
-            AddAssert("playlist has 1 item", () => Room.Playlist.Count == 1);
+            AddAssert("playlist has 1 item", () => SelectedRoom.Value.Playlist.Count == 1);
         }
 
         [Test]
@@ -113,7 +116,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("create new item", () => songSelect.BeatmapDetails.CreateNewItem());
             AddStep("finalise selection", () => songSelect.FinaliseSelection());
-            AddAssert("playlist has 1 item", () => Room.Playlist.Count == 1);
+            AddAssert("playlist has 1 item", () => SelectedRoom.Value.Playlist.Count == 1);
         }
 
         [Test]
@@ -121,7 +124,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         {
             AddStep("create new item", () => songSelect.BeatmapDetails.CreateNewItem());
             AddStep("create new item", () => songSelect.BeatmapDetails.CreateNewItem());
-            AddAssert("playlist has 2 items", () => Room.Playlist.Count == 2);
+            AddAssert("playlist has 2 items", () => SelectedRoom.Value.Playlist.Count == 2);
         }
 
         [Test]
@@ -131,13 +134,13 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddStep("create new item", () => songSelect.BeatmapDetails.CreateNewItem());
             AddStep("rearrange", () =>
             {
-                var item = Room.Playlist[0];
-                Room.Playlist.RemoveAt(0);
-                Room.Playlist.Add(item);
+                var item = SelectedRoom.Value.Playlist[0];
+                SelectedRoom.Value.Playlist.RemoveAt(0);
+                SelectedRoom.Value.Playlist.Add(item);
             });
 
             AddStep("create new item", () => songSelect.BeatmapDetails.CreateNewItem());
-            AddAssert("new item has id 2", () => Room.Playlist.Last().ID == 2);
+            AddAssert("new item has id 2", () => SelectedRoom.Value.Playlist.Last().ID == 2);
         }
 
         /// <summary>
@@ -151,8 +154,8 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddStep("change mod rate", () => ((OsuModDoubleTime)SelectedMods.Value[0]).SpeedChange.Value = 2);
             AddStep("create item", () => songSelect.BeatmapDetails.CreateNewItem());
 
-            AddAssert("item 1 has rate 1.5", () => Precision.AlmostEquals(1.5, ((OsuModDoubleTime)Room.Playlist.First().RequiredMods[0]).SpeedChange.Value));
-            AddAssert("item 2 has rate 2", () => Precision.AlmostEquals(2, ((OsuModDoubleTime)Room.Playlist.Last().RequiredMods[0]).SpeedChange.Value));
+            AddAssert("item 1 has rate 1.5", () => Precision.AlmostEquals(1.5, ((OsuModDoubleTime)SelectedRoom.Value.Playlist.First().RequiredMods[0]).SpeedChange.Value));
+            AddAssert("item 2 has rate 2", () => Precision.AlmostEquals(2, ((OsuModDoubleTime)SelectedRoom.Value.Playlist.Last().RequiredMods[0]).SpeedChange.Value));
         }
 
         /// <summary>
@@ -174,7 +177,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddStep("create item", () => songSelect.BeatmapDetails.CreateNewItem());
 
             AddStep("change stored mod rate", () => mod.SpeedChange.Value = 2);
-            AddAssert("item has rate 1.5", () => Precision.AlmostEquals(1.5, ((OsuModDoubleTime)Room.Playlist.First().RequiredMods[0]).SpeedChange.Value));
+            AddAssert("item has rate 1.5", () => Precision.AlmostEquals(1.5, ((OsuModDoubleTime)SelectedRoom.Value.Playlist.First().RequiredMods[0]).SpeedChange.Value));
         }
 
         private class TestPlaylistsSongSelect : PlaylistsSongSelect

osu.Game.Tests/Visual/Online/TestSceneBeatmapListingOverlay.cs

@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
@@ -14,6 +15,8 @@ using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Overlays;
 using osu.Game.Overlays.BeatmapListing;
 using osu.Game.Rulesets;
+using osu.Game.Scoring;
+using osu.Game.Users;
 
 namespace osu.Game.Tests.Visual.Online
 {
@@ -23,6 +26,8 @@ namespace osu.Game.Tests.Visual.Online
 
         private BeatmapListingOverlay overlay;
 
+        private BeatmapListingSearchControl searchControl => overlay.ChildrenOfType<BeatmapListingSearchControl>().Single();
+
         [BackgroundDependencyLoader]
         private void load()
         {
@@ -39,6 +44,16 @@ namespace osu.Game.Tests.Visual.Online
 
                 return true;
             };
+
+            AddStep("initialize dummy", () =>
+            {
+                // non-supporter user
+                ((DummyAPIAccess)API).LocalUser.Value = new User
+                {
+                    Username = "TestBot",
+                    Id = API.LocalUser.Value.Id + 1,
+                };
+            });
         }
 
         [Test]
@@ -58,13 +73,164 @@ namespace osu.Game.Tests.Visual.Online
             AddUntilStep("placeholder shown", () => overlay.ChildrenOfType<BeatmapListingOverlay.NotFoundDrawable>().SingleOrDefault()?.IsPresent == true);
         }
 
+        [Test]
+        public void TestUserWithoutSupporterUsesSupporterOnlyFiltersWithoutResults()
+        {
+            AddStep("fetch for 0 beatmaps", () => fetchFor());
+            AddStep("set dummy as non-supporter", () => ((DummyAPIAccess)API).LocalUser.Value.IsSupporter = false);
+
+            // only Rank Achieved filter
+            setRankAchievedFilter(new[] { ScoreRank.XH });
+            supporterRequiredPlaceholderShown();
+
+            setRankAchievedFilter(Array.Empty<ScoreRank>());
+            notFoundPlaceholderShown();
+
+            // only Played filter
+            setPlayedFilter(SearchPlayed.Played);
+            supporterRequiredPlaceholderShown();
+
+            setPlayedFilter(SearchPlayed.Any);
+            notFoundPlaceholderShown();
+
+            // both RankAchieved and Played filters
+            setRankAchievedFilter(new[] { ScoreRank.XH });
+            setPlayedFilter(SearchPlayed.Played);
+            supporterRequiredPlaceholderShown();
+
+            setRankAchievedFilter(Array.Empty<ScoreRank>());
+            setPlayedFilter(SearchPlayed.Any);
+            notFoundPlaceholderShown();
+        }
+
+        [Test]
+        public void TestUserWithSupporterUsesSupporterOnlyFiltersWithoutResults()
+        {
+            AddStep("fetch for 0 beatmaps", () => fetchFor());
+            AddStep("set dummy as supporter", () => ((DummyAPIAccess)API).LocalUser.Value.IsSupporter = true);
+
+            // only Rank Achieved filter
+            setRankAchievedFilter(new[] { ScoreRank.XH });
+            notFoundPlaceholderShown();
+
+            setRankAchievedFilter(Array.Empty<ScoreRank>());
+            notFoundPlaceholderShown();
+
+            // only Played filter
+            setPlayedFilter(SearchPlayed.Played);
+            notFoundPlaceholderShown();
+
+            setPlayedFilter(SearchPlayed.Any);
+            notFoundPlaceholderShown();
+
+            // both Rank Achieved and Played filters
+            setRankAchievedFilter(new[] { ScoreRank.XH });
+            setPlayedFilter(SearchPlayed.Played);
+            notFoundPlaceholderShown();
+
+            setRankAchievedFilter(Array.Empty<ScoreRank>());
+            setPlayedFilter(SearchPlayed.Any);
+            notFoundPlaceholderShown();
+        }
+
+        [Test]
+        public void TestUserWithoutSupporterUsesSupporterOnlyFiltersWithResults()
+        {
+            AddStep("fetch for 1 beatmap", () => fetchFor(CreateBeatmap(Ruleset.Value).BeatmapInfo.BeatmapSet));
+            AddStep("set dummy as non-supporter", () => ((DummyAPIAccess)API).LocalUser.Value.IsSupporter = false);
+
+            // only Rank Achieved filter
+            setRankAchievedFilter(new[] { ScoreRank.XH });
+            supporterRequiredPlaceholderShown();
+
+            setRankAchievedFilter(Array.Empty<ScoreRank>());
+            noPlaceholderShown();
+
+            // only Played filter
+            setPlayedFilter(SearchPlayed.Played);
+            supporterRequiredPlaceholderShown();
+
+            setPlayedFilter(SearchPlayed.Any);
+            noPlaceholderShown();
+
+            // both Rank Achieved and Played filters
+            setRankAchievedFilter(new[] { ScoreRank.XH });
+            setPlayedFilter(SearchPlayed.Played);
+            supporterRequiredPlaceholderShown();
+
+            setRankAchievedFilter(Array.Empty<ScoreRank>());
+            setPlayedFilter(SearchPlayed.Any);
+            noPlaceholderShown();
+        }
+
+        [Test]
+        public void TestUserWithSupporterUsesSupporterOnlyFiltersWithResults()
+        {
+            AddStep("fetch for 1 beatmap", () => fetchFor(CreateBeatmap(Ruleset.Value).BeatmapInfo.BeatmapSet));
+            AddStep("set dummy as supporter", () => ((DummyAPIAccess)API).LocalUser.Value.IsSupporter = true);
+
+            // only Rank Achieved filter
+            setRankAchievedFilter(new[] { ScoreRank.XH });
+            noPlaceholderShown();
+
+            setRankAchievedFilter(Array.Empty<ScoreRank>());
+            noPlaceholderShown();
+
+            // only Played filter
+            setPlayedFilter(SearchPlayed.Played);
+            noPlaceholderShown();
+
+            setPlayedFilter(SearchPlayed.Any);
+            noPlaceholderShown();
+
+            // both Rank Achieved and Played filters
+            setRankAchievedFilter(new[] { ScoreRank.XH });
+            setPlayedFilter(SearchPlayed.Played);
+            noPlaceholderShown();
+
+            setRankAchievedFilter(Array.Empty<ScoreRank>());
+            setPlayedFilter(SearchPlayed.Any);
+            noPlaceholderShown();
+        }
+
         private void fetchFor(params BeatmapSetInfo[] beatmaps)
         {
             setsForResponse.Clear();
             setsForResponse.AddRange(beatmaps.Select(b => new TestAPIBeatmapSet(b)));
 
             // trigger arbitrary change for fetching.
-            overlay.ChildrenOfType<BeatmapListingSearchControl>().Single().Query.TriggerChange();
+            searchControl.Query.TriggerChange();
+        }
+
+        private void setRankAchievedFilter(ScoreRank[] ranks)
+        {
+            AddStep($"set Rank Achieved filter to [{string.Join(',', ranks)}]", () =>
+            {
+                searchControl.Ranks.Clear();
+                searchControl.Ranks.AddRange(ranks);
+            });
+        }
+
+        private void setPlayedFilter(SearchPlayed played)
+        {
+            AddStep($"set Played filter to {played}", () => searchControl.Played.Value = played);
+        }
+
+        private void supporterRequiredPlaceholderShown()
+        {
+            AddUntilStep("\"supporter required\" placeholder shown", () => overlay.ChildrenOfType<BeatmapListingOverlay.SupporterRequiredDrawable>().SingleOrDefault()?.IsPresent == true);
+        }
+
+        private void notFoundPlaceholderShown()
+        {
+            AddUntilStep("\"no maps found\" placeholder shown", () => overlay.ChildrenOfType<BeatmapListingOverlay.NotFoundDrawable>().SingleOrDefault()?.IsPresent == true);
+        }
+
+        private void noPlaceholderShown()
+        {
+            AddUntilStep("no placeholder shown", () =>
+                !overlay.ChildrenOfType<BeatmapListingOverlay.SupporterRequiredDrawable>().Any()
+                && !overlay.ChildrenOfType<BeatmapListingOverlay.NotFoundDrawable>().Any());
         }
 
         private class TestAPIBeatmapSet : APIBeatmapSet

osu.Game.Tests/Visual/Online/TestSceneChatOverlay.cs

@@ -82,7 +82,8 @@ namespace osu.Game.Tests.Visual.Online
                 {
                     switch (req)
                     {
-                        case JoinChannelRequest _:
+                        case JoinChannelRequest joinChannel:
+                            joinChannel.TriggerSuccess();
                             return true;
                     }
 

osu.Game.Tests/Visual/Playlists/TestScenePlaylistsLoungeSubScreen.cs

@@ -3,25 +3,21 @@
 
 using System.Linq;
 using NUnit.Framework;
-using osu.Framework.Allocation;
 using osu.Framework.Screens;
 using osu.Framework.Testing;
 using osu.Game.Graphics.Containers;
 using osu.Game.Screens.OnlinePlay.Lounge;
 using osu.Game.Screens.OnlinePlay.Lounge.Components;
 using osu.Game.Screens.OnlinePlay.Playlists;
-using osu.Game.Tests.Visual.Multiplayer;
+using osu.Game.Tests.Visual.OnlinePlay;
 
 namespace osu.Game.Tests.Visual.Playlists
 {
-    public class TestScenePlaylistsLoungeSubScreen : RoomManagerTestScene
+    public class TestScenePlaylistsLoungeSubScreen : OnlinePlayTestScene
     {
-        private LoungeSubScreen loungeScreen;
+        protected new BasicTestRoomManager RoomManager => (BasicTestRoomManager)base.RoomManager;
 
-        [BackgroundDependencyLoader]
-        private void load()
-        {
-        }
+        private LoungeSubScreen loungeScreen;
 
         public override void SetUpSteps()
         {
@@ -37,7 +33,7 @@ namespace osu.Game.Tests.Visual.Playlists
         [Test]
         public void TestScrollSelectedIntoView()
         {
-            AddRooms(30);
+            AddStep("add rooms", () => RoomManager.AddRooms(30));
 
             AddUntilStep("first room is not masked", () => checkRoomVisible(roomsContainer.Rooms.First()));
 

osu.Game.Tests/Visual/Playlists/TestScenePlaylistsMatchSettingsOverlay.cs

@@ -3,7 +3,6 @@
 
 using System;
 using NUnit.Framework;
-using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -12,26 +11,28 @@ using osu.Game.Graphics.UserInterface;
 using osu.Game.Online.Rooms;
 using osu.Game.Screens.OnlinePlay;
 using osu.Game.Screens.OnlinePlay.Playlists;
+using osu.Game.Tests.Visual.OnlinePlay;
 
 namespace osu.Game.Tests.Visual.Playlists
 {
-    public class TestScenePlaylistsMatchSettingsOverlay : RoomTestScene
+    public class TestScenePlaylistsMatchSettingsOverlay : OnlinePlayTestScene
     {
-        [Cached(Type = typeof(IRoomManager))]
-        private TestRoomManager roomManager = new TestRoomManager();
+        protected new TestRoomManager RoomManager => (TestRoomManager)base.RoomManager;
 
         private TestRoomSettings settings;
 
+        protected override OnlinePlayTestSceneDependencies CreateOnlinePlayDependencies() => new TestDependencies();
+
         [SetUp]
         public new void Setup() => Schedule(() =>
         {
-            settings = new TestRoomSettings
+            SelectedRoom.Value = new Room();
+
+            Child = settings = new TestRoomSettings
             {
                 RelativeSizeAxes = Axes.Both,
                 State = { Value = Visibility.Visible }
             };
-
-            Child = settings;
         });
 
         [Test]
@@ -39,19 +40,19 @@ namespace osu.Game.Tests.Visual.Playlists
         {
             AddStep("clear name and beatmap", () =>
             {
-                Room.Name.Value = "";
-                Room.Playlist.Clear();
+                SelectedRoom.Value.Name.Value = "";
+                SelectedRoom.Value.Playlist.Clear();
             });
 
             AddAssert("button disabled", () => !settings.ApplyButton.Enabled.Value);
 
-            AddStep("set name", () => Room.Name.Value = "Room name");
+            AddStep("set name", () => SelectedRoom.Value.Name.Value = "Room name");
             AddAssert("button disabled", () => !settings.ApplyButton.Enabled.Value);
 
-            AddStep("set beatmap", () => Room.Playlist.Add(new PlaylistItem { Beatmap = { Value = CreateBeatmap(Ruleset.Value).BeatmapInfo } }));
+            AddStep("set beatmap", () => SelectedRoom.Value.Playlist.Add(new PlaylistItem { Beatmap = { Value = CreateBeatmap(Ruleset.Value).BeatmapInfo } }));
             AddAssert("button enabled", () => settings.ApplyButton.Enabled.Value);
 
-            AddStep("clear name", () => Room.Name.Value = "");
+            AddStep("clear name", () => SelectedRoom.Value.Name.Value = "");
             AddAssert("button disabled", () => !settings.ApplyButton.Enabled.Value);
         }
 
@@ -67,9 +68,9 @@ namespace osu.Game.Tests.Visual.Playlists
             {
                 settings.NameField.Current.Value = expected_name;
                 settings.DurationField.Current.Value = expectedDuration;
-                Room.Playlist.Add(new PlaylistItem { Beatmap = { Value = CreateBeatmap(Ruleset.Value).BeatmapInfo } });
+                SelectedRoom.Value.Playlist.Add(new PlaylistItem { Beatmap = { Value = CreateBeatmap(Ruleset.Value).BeatmapInfo } });
 
-                roomManager.CreateRequested = r =>
+                RoomManager.CreateRequested = r =>
                 {
                     createdRoom = r;
                     return true;
@@ -88,11 +89,11 @@ namespace osu.Game.Tests.Visual.Playlists
 
             AddStep("setup", () =>
             {
-                Room.Name.Value = "Test Room";
-                Room.Playlist.Add(new PlaylistItem { Beatmap = { Value = CreateBeatmap(Ruleset.Value).BeatmapInfo } });
+                SelectedRoom.Value.Name.Value = "Test Room";
+                SelectedRoom.Value.Playlist.Add(new PlaylistItem { Beatmap = { Value = CreateBeatmap(Ruleset.Value).BeatmapInfo } });
 
                 fail = true;
-                roomManager.CreateRequested = _ => !fail;
+                RoomManager.CreateRequested = _ => !fail;
             });
             AddAssert("error not displayed", () => !settings.ErrorText.IsPresent);
 
@@ -119,7 +120,12 @@ namespace osu.Game.Tests.Visual.Playlists
             public OsuSpriteText ErrorText => ((MatchSettings)Settings).ErrorText;
         }
 
-        private class TestRoomManager : IRoomManager
+        private class TestDependencies : OnlinePlayTestSceneDependencies
+        {
+            protected override IRoomManager CreateRoomManager() => new TestRoomManager();
+        }
+
+        protected class TestRoomManager : IRoomManager
         {
             public const string FAILED_TEXT = "failed";
 

osu.Game.Tests/Visual/Playlists/TestScenePlaylistsParticipantsList.cs

@@ -3,21 +3,23 @@
 
 using NUnit.Framework;
 using osu.Framework.Graphics;
+using osu.Game.Online.Rooms;
 using osu.Game.Screens.OnlinePlay.Components;
+using osu.Game.Tests.Visual.OnlinePlay;
 using osu.Game.Users;
 
 namespace osu.Game.Tests.Visual.Playlists
 {
-    public class TestScenePlaylistsParticipantsList : RoomTestScene
+    public class TestScenePlaylistsParticipantsList : OnlinePlayTestScene
     {
         [SetUp]
         public new void Setup() => Schedule(() =>
         {
-            Room.RoomID.Value = 7;
+            SelectedRoom.Value = new Room { RoomID = { Value = 7 } };
 
             for (int i = 0; i < 50; i++)
             {
-                Room.RecentParticipants.Add(new User
+                SelectedRoom.Value.RecentParticipants.Add(new User
                 {
                     Username = "peppy",
                     Statistics = new UserStatistics { GlobalRank = 1234 },

osu.Game.Tests/Visual/Playlists/TestScenePlaylistsRoomSubScreen.cs

@@ -15,20 +15,17 @@ using osu.Game.Online.API;
 using osu.Game.Online.Rooms;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Osu;
-using osu.Game.Screens.OnlinePlay;
 using osu.Game.Screens.OnlinePlay.Playlists;
 using osu.Game.Screens.Play;
 using osu.Game.Tests.Beatmaps;
+using osu.Game.Tests.Visual.OnlinePlay;
 using osu.Game.Users;
 using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Playlists
 {
-    public class TestScenePlaylistsRoomSubScreen : RoomTestScene
+    public class TestScenePlaylistsRoomSubScreen : OnlinePlayTestScene
     {
-        [Cached(typeof(IRoomManager))]
-        private readonly TestRoomManager roomManager = new TestRoomManager();
-
         private BeatmapManager manager;
         private RulesetStore rulesets;
 
@@ -40,8 +37,6 @@ namespace osu.Game.Tests.Visual.Playlists
             Dependencies.Cache(rulesets = new RulesetStore(ContextFactory));
             Dependencies.Cache(manager = new BeatmapManager(LocalStorage, ContextFactory, rulesets, null, audio, Resources, host, Beatmap.Default));
 
-            manager.Import(new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo.BeatmapSet).Wait();
-
             ((DummyAPIAccess)API).HandleRequest = req =>
             {
                 switch (req)
@@ -58,7 +53,9 @@ namespace osu.Game.Tests.Visual.Playlists
         [SetUpSteps]
         public void SetupSteps()
         {
-            AddStep("load match", () => LoadScreen(match = new TestPlaylistsRoomSubScreen(Room)));
+            AddStep("set room", () => SelectedRoom.Value = new Room());
+            AddStep("ensure has beatmap", () => manager.Import(new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo.BeatmapSet).Wait());
+            AddStep("load match", () => LoadScreen(match = new TestPlaylistsRoomSubScreen(SelectedRoom.Value)));
             AddUntilStep("wait for load", () => match.IsCurrentScreen());
         }
 
@@ -67,12 +64,12 @@ namespace osu.Game.Tests.Visual.Playlists
         {
             AddStep("set room properties", () =>
             {
-                Room.RoomID.Value = 1;
-                Room.Name.Value = "my awesome room";
-                Room.Host.Value = new User { Id = 2, Username = "peppy" };
-                Room.RecentParticipants.Add(Room.Host.Value);
-                Room.EndDate.Value = DateTimeOffset.Now.AddMinutes(5);
-                Room.Playlist.Add(new PlaylistItem
+                SelectedRoom.Value.RoomID.Value = 1;
+                SelectedRoom.Value.Name.Value = "my awesome room";
+                SelectedRoom.Value.Host.Value = new User { Id = 2, Username = "peppy" };
+                SelectedRoom.Value.RecentParticipants.Add(SelectedRoom.Value.Host.Value);
+                SelectedRoom.Value.EndDate.Value = DateTimeOffset.Now.AddMinutes(5);
+                SelectedRoom.Value.Playlist.Add(new PlaylistItem
                 {
                     Beatmap = { Value = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo },
                     Ruleset = { Value = new OsuRuleset().RulesetInfo }
@@ -88,9 +85,9 @@ namespace osu.Game.Tests.Visual.Playlists
         {
             AddStep("set room properties", () =>
             {
-                Room.Name.Value = "my awesome room";
-                Room.Host.Value = new User { Id = 2, Username = "peppy" };
-                Room.Playlist.Add(new PlaylistItem
+                SelectedRoom.Value.Name.Value = "my awesome room";
+                SelectedRoom.Value.Host.Value = new User { Id = 2, Username = "peppy" };
+                SelectedRoom.Value.Playlist.Add(new PlaylistItem
                 {
                     Beatmap = { Value = new TestBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo },
                     Ruleset = { Value = new OsuRuleset().RulesetInfo }
@@ -104,17 +101,34 @@ namespace osu.Game.Tests.Visual.Playlists
 
             AddStep("click", () => InputManager.Click(MouseButton.Left));
 
-            AddAssert("first playlist item selected", () => match.SelectedItem.Value == Room.Playlist[0]);
+            AddAssert("first playlist item selected", () => match.SelectedItem.Value == SelectedRoom.Value.Playlist[0]);
         }
 
         [Test]
         public void TestBeatmapUpdatedOnReImport()
         {
             BeatmapSetInfo importedSet = null;
+            TestBeatmap beatmap = null;
+
+            // this step is required to make sure the further imports actually get online IDs.
+            // all the playlist logic relies on online ID matching.
+            AddStep("remove all matching online IDs", () =>
+            {
+                beatmap = new TestBeatmap(new OsuRuleset().RulesetInfo);
+
+                var existing = manager.QueryBeatmapSets(s => s.OnlineBeatmapSetID == beatmap.BeatmapInfo.BeatmapSet.OnlineBeatmapSetID).ToList();
+
+                foreach (var s in existing)
+                {
+                    s.OnlineBeatmapSetID = null;
+                    foreach (var b in s.Beatmaps)
+                        b.OnlineBeatmapID = null;
+                    manager.Update(s);
+                }
+            });
 
             AddStep("import altered beatmap", () =>
             {
-                var beatmap = new TestBeatmap(new OsuRuleset().RulesetInfo);
                 beatmap.BeatmapInfo.BaseDifficulty.CircleSize = 1;
 
                 importedSet = manager.Import(beatmap.BeatmapInfo.BeatmapSet).Result;
@@ -122,9 +136,9 @@ namespace osu.Game.Tests.Visual.Playlists
 
             AddStep("load room", () =>
             {
-                Room.Name.Value = "my awesome room";
-                Room.Host.Value = new User { Id = 2, Username = "peppy" };
-                Room.Playlist.Add(new PlaylistItem
+                SelectedRoom.Value.Name.Value = "my awesome room";
+                SelectedRoom.Value.Host.Value = new User { Id = 2, Username = "peppy" };
+                SelectedRoom.Value.Playlist.Add(new PlaylistItem
                 {
                     Beatmap = { Value = importedSet.Beatmaps[0] },
                     Ruleset = { Value = new OsuRuleset().RulesetInfo }
@@ -155,30 +169,5 @@ namespace osu.Game.Tests.Visual.Playlists
             {
             }
         }
-
-        private class TestRoomManager : IRoomManager
-        {
-            public event Action RoomsUpdated
-            {
-                add => throw new NotImplementedException();
-                remove => throw new NotImplementedException();
-            }
-
-            public IBindable<bool> InitialRoomsReceived { get; } = new Bindable<bool>(true);
-
-            public IBindableList<Room> Rooms { get; } = new BindableList<Room>();
-
-            public void CreateRoom(Room room, Action<Room> onSuccess = null, Action<string> onError = null)
-            {
-                room.RoomID.Value = 1;
-                onSuccess?.Invoke(room);
-            }
-
-            public void JoinRoom(Room room, Action<Room> onSuccess = null, Action<string> onError = null) => onSuccess?.Invoke(room);
-
-            public void PartRoom()
-            {
-            }
-        }
     }
 }

osu.Game.Tests/Visual/UserInterface/TestSceneOsuIcon.cs

@@ -10,6 +10,7 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Localisation;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Containers;
 using osuTK;
@@ -59,7 +60,7 @@ namespace osu.Game.Tests.Visual.UserInterface
 
         private class Icon : Container, IHasTooltip
         {
-            public string TooltipText { get; }
+            public LocalisableString TooltipText { get; }
 
             public SpriteIcon SpriteIcon { get; }
 

osu.Game.Tournament.Tests/NonVisual/CustomTourneyDirectoryTest.cs

@@ -149,7 +149,8 @@ namespace osu.Game.Tournament.Tests.NonVisual
         private TournamentGameBase loadOsu(GameHost host)
         {
             var osu = new TournamentGameBase();
-            Task.Run(() => host.Run(osu));
+            Task.Run(() => host.Run(osu))
+                .ContinueWith(t => Assert.Fail($"Host threw exception {t.Exception}"), TaskContinuationOptions.OnlyOnFaulted);
             waitForOrAssert(() => osu.IsLoaded, @"osu! failed to start in a reasonable amount of time");
             return osu;
         }

osu.Game.Tournament.Tests/NonVisual/IPCLocationTest.cs

@@ -55,7 +55,8 @@ namespace osu.Game.Tournament.Tests.NonVisual
         private TournamentGameBase loadOsu(GameHost host)
         {
             var osu = new TournamentGameBase();
-            Task.Run(() => host.Run(osu));
+            Task.Run(() => host.Run(osu))
+                .ContinueWith(t => Assert.Fail($"Host threw exception {t.Exception}"), TaskContinuationOptions.OnlyOnFaulted);
             waitForOrAssert(() => osu.IsLoaded, @"osu! failed to start in a reasonable amount of time");
             return osu;
         }

osu.Game.Tournament/Screens/Editors/RoundEditorScreen.cs

@@ -147,7 +147,7 @@ namespace osu.Game.Tournament.Screens.Editors
                     [Resolved]
                     protected IAPIProvider API { get; private set; }
 
-                    private readonly Bindable<string> beatmapId = new Bindable<string>();
+                    private readonly Bindable<int?> beatmapId = new Bindable<int?>();
 
                     private readonly Bindable<string> mods = new Bindable<string>();
 
@@ -220,14 +220,12 @@ namespace osu.Game.Tournament.Screens.Editors
                     [BackgroundDependencyLoader]
                     private void load(RulesetStore rulesets)
                     {
-                        beatmapId.Value = Model.ID.ToString();
-                        beatmapId.BindValueChanged(idString =>
+                        beatmapId.Value = Model.ID;
+                        beatmapId.BindValueChanged(id =>
                         {
-                            int.TryParse(idString.NewValue, out var parsed);
+                            Model.ID = id.NewValue ?? 0;
 
-                            Model.ID = parsed;
-
-                            if (idString.NewValue != idString.OldValue)
+                            if (id.NewValue != id.OldValue)
                                 Model.BeatmapInfo = null;
 
                             if (Model.BeatmapInfo != null)

osu.Game.Tournament/Screens/Editors/SeedingEditorScreen.cs

@@ -147,7 +147,7 @@ namespace osu.Game.Tournament.Screens.Editors
                     [Resolved]
                     protected IAPIProvider API { get; private set; }
 
-                    private readonly Bindable<string> beatmapId = new Bindable<string>();
+                    private readonly Bindable<int?> beatmapId = new Bindable<int?>();
 
                     private readonly Bindable<string> score = new Bindable<string>();
 
@@ -228,16 +228,12 @@ namespace osu.Game.Tournament.Screens.Editors
                     [BackgroundDependencyLoader]
                     private void load(RulesetStore rulesets)
                     {
-                        beatmapId.Value = Model.ID.ToString();
-                        beatmapId.BindValueChanged(idString =>
+                        beatmapId.Value = Model.ID;
+                        beatmapId.BindValueChanged(id =>
                         {
-                            int parsed;
+                            Model.ID = id.NewValue ?? 0;
 
-                            int.TryParse(idString.NewValue, out parsed);
-
-                            Model.ID = parsed;
-
-                            if (idString.NewValue != idString.OldValue)
+                            if (id.NewValue != id.OldValue)
                                 Model.BeatmapInfo = null;
 
                             if (Model.BeatmapInfo != null)

osu.Game.Tournament/Screens/Editors/TeamEditorScreen.cs

@@ -214,7 +214,7 @@ namespace osu.Game.Tournament.Screens.Editors
                     [Resolved]
                     private TournamentGameBase game { get; set; }
 
-                    private readonly Bindable<string> userId = new Bindable<string>();
+                    private readonly Bindable<int?> userId = new Bindable<int?>();
 
                     private readonly Container drawableContainer;
 
@@ -278,14 +278,12 @@ namespace osu.Game.Tournament.Screens.Editors
                     [BackgroundDependencyLoader]
                     private void load()
                     {
-                        userId.Value = user.Id.ToString();
-                        userId.BindValueChanged(idString =>
+                        userId.Value = user.Id;
+                        userId.BindValueChanged(id =>
                         {
-                            int.TryParse(idString.NewValue, out var parsed);
+                            user.Id = id.NewValue ?? 0;
 
-                            user.Id = parsed;
-
-                            if (idString.NewValue != idString.OldValue)
+                            if (id.NewValue != id.OldValue)
                                 user.Username = string.Empty;
 
                             if (!string.IsNullOrEmpty(user.Username))

osu.Game/Beatmaps/BeatmapManager.cs

@@ -181,8 +181,13 @@ namespace osu.Game.Beatmaps
                 if (existingOnlineId != null)
                 {
                     Delete(existingOnlineId);
-                    beatmaps.PurgeDeletable(s => s.ID == existingOnlineId.ID);
-                    LogForModel(beatmapSet, $"Found existing beatmap set with same OnlineBeatmapSetID ({beatmapSet.OnlineBeatmapSetID}). It has been purged.");
+
+                    // in order to avoid a unique key constraint, immediately remove the online ID from the previous set.
+                    existingOnlineId.OnlineBeatmapSetID = null;
+                    foreach (var b in existingOnlineId.Beatmaps)
+                        b.OnlineBeatmapID = null;
+
+                    LogForModel(beatmapSet, $"Found existing beatmap set with same OnlineBeatmapSetID ({beatmapSet.OnlineBeatmapSetID}). It has been deleted.");
                 }
             }
         }
@@ -191,8 +196,6 @@ namespace osu.Game.Beatmaps
         {
             var beatmapIds = beatmapSet.Beatmaps.Where(b => b.OnlineBeatmapID.HasValue).Select(b => b.OnlineBeatmapID).ToList();
 
-            LogForModel(beatmapSet, $"Validating online IDs for {beatmapSet.Beatmaps.Count} beatmaps...");
-
             // ensure all IDs are unique
             if (beatmapIds.GroupBy(b => b).Any(g => g.Count() > 1))
             {
@@ -319,6 +322,14 @@ namespace osu.Game.Beatmaps
         /// <returns>The first result for the provided query, or null if no results were found.</returns>
         public BeatmapSetInfo QueryBeatmapSet(Expression<Func<BeatmapSetInfo, bool>> query) => beatmaps.ConsumableItems.AsNoTracking().FirstOrDefault(query);
 
+        protected override bool CanSkipImport(BeatmapSetInfo existing, BeatmapSetInfo import)
+        {
+            if (!base.CanReuseExisting(existing, import))
+                return false;
+
+            return existing.Beatmaps.Any(b => b.OnlineBeatmapID != null);
+        }
+
         protected override bool CanReuseExisting(BeatmapSetInfo existing, BeatmapSetInfo import)
         {
             if (!base.CanReuseExisting(existing, import))

osu.Game/Beatmaps/BeatmapManager_BeatmapOnlineLookupQueue.cs

@@ -48,7 +48,6 @@ namespace osu.Game.Beatmaps
 
             public Task UpdateAsync(BeatmapSetInfo beatmapSet, CancellationToken cancellationToken)
             {
-                LogForModel(beatmapSet, "Performing online lookups...");
                 return Task.WhenAll(beatmapSet.Beatmaps.Select(b => UpdateAsync(beatmapSet, b, cancellationToken)).ToArray());
             }
 

osu.Game/Configuration/SettingSourceAttribute.cs

@@ -31,7 +31,7 @@ namespace osu.Game.Configuration
     {
         public LocalisableString Label { get; }
 
-        public string Description { get; }
+        public LocalisableString Description { get; }
 
         public int? OrderPosition { get; }
 

osu.Game/Database/ArchiveModelManager.cs

@@ -78,7 +78,7 @@ namespace osu.Game.Database
 
         private readonly Bindable<WeakReference<TModel>> itemRemoved = new Bindable<WeakReference<TModel>>();
 
-        public virtual IEnumerable<string> HandledExtensions => new[] { ".zip" };
+        public virtual IEnumerable<string> HandledExtensions => new[] { @".zip" };
 
         protected readonly FileStore Files;
 
@@ -99,7 +99,7 @@ namespace osu.Game.Database
             ModelStore.ItemUpdated += item => handleEvent(() => itemUpdated.Value = new WeakReference<TModel>(item));
             ModelStore.ItemRemoved += item => handleEvent(() => itemRemoved.Value = new WeakReference<TModel>(item));
 
-            exportStorage = storage.GetStorageForDirectory("exports");
+            exportStorage = storage.GetStorageForDirectory(@"exports");
 
             Files = new FileStore(contextFactory, storage);
 
@@ -282,7 +282,7 @@ namespace osu.Game.Database
             }
             catch (Exception e)
             {
-                LogForModel(model, $"Model creation of {archive.Name} failed.", e);
+                LogForModel(model, @$"Model creation of {archive.Name} failed.", e);
                 return null;
             }
 
@@ -309,6 +309,12 @@ namespace osu.Game.Database
                 Logger.Log($"{prefix} {message}", LoggingTarget.Database);
         }
 
+        /// <summary>
+        /// Whether the implementation overrides <see cref="ComputeHash"/> with a custom implementation.
+        /// Custom hash implementations must bypass the early exit in the import flow (see <see cref="computeHashFast"/> usage).
+        /// </summary>
+        protected virtual bool HasCustomHashFunction => false;
+
         /// <summary>
         /// Create a SHA-2 hash from the provided archive based on file content of all files matching <see cref="HashableFileTypes"/>.
         /// </summary>
@@ -317,7 +323,11 @@ namespace osu.Game.Database
         /// </remarks>
         protected virtual string ComputeHash(TModel item, ArchiveReader reader = null)
         {
-            // for now, concatenate all .osu files in the set to create a unique hash.
+            if (reader != null)
+                // fast hashing for cases where the item's files may not be populated.
+                return computeHashFast(reader);
+
+            // for now, concatenate all hashable files in the set to create a unique hash.
             MemoryStream hashable = new MemoryStream();
 
             foreach (TFileModel file in item.Files.Where(f => HashableFileTypes.Any(ext => f.Filename.EndsWith(ext, StringComparison.OrdinalIgnoreCase))).OrderBy(f => f.Filename))
@@ -329,9 +339,6 @@ namespace osu.Game.Database
             if (hashable.Length > 0)
                 return hashable.ComputeSHA2Hash();
 
-            if (reader != null)
-                return reader.Name.ComputeSHA2Hash();
-
             return item.Hash;
         }
 
@@ -348,19 +355,48 @@ namespace osu.Game.Database
 
             delayEvents();
 
+            bool checkedExisting = false;
+            TModel existing = null;
+
+            if (archive != null && !HasCustomHashFunction)
+            {
+                // this is a fast bail condition to improve large import performance.
+                item.Hash = computeHashFast(archive);
+
+                checkedExisting = true;
+                existing = CheckForExisting(item);
+
+                if (existing != null)
+                {
+                    // bare minimum comparisons
+                    //
+                    // note that this should really be checking filesizes on disk (of existing files) for some degree of sanity.
+                    // or alternatively doing a faster hash check. either of these require database changes and reprocessing of existing files.
+                    if (CanSkipImport(existing, item) &&
+                        getFilenames(existing.Files).SequenceEqual(getShortenedFilenames(archive).Select(p => p.shortened).OrderBy(f => f)))
+                    {
+                        LogForModel(item, @$"Found existing (optimised) {HumanisedModelName} for {item} (ID {existing.ID}) – skipping import.");
+                        Undelete(existing);
+                        return existing;
+                    }
+
+                    LogForModel(item, @"Found existing (optimised) but failed pre-check.");
+                }
+            }
+
             void rollback()
             {
                 if (!Delete(item))
                 {
                     // We may have not yet added the model to the underlying table, but should still clean up files.
-                    LogForModel(item, "Dereferencing files for incomplete import.");
+                    LogForModel(item, @"Dereferencing files for incomplete import.");
                     Files.Dereference(item.Files.Select(f => f.FileInfo).ToArray());
                 }
             }
 
             try
             {
-                LogForModel(item, "Beginning import...");
+                LogForModel(item, @"Beginning import...");
 
                 item.Files = archive != null ? createFileInfos(archive, Files) : new List<TFileModel>();
                 item.Hash = ComputeHash(item, archive);
@@ -371,22 +407,24 @@ namespace osu.Game.Database
                 {
                     try
                     {
-                        if (!write.IsTransactionLeader) throw new InvalidOperationException($"Ensure there is no parent transaction so errors can correctly be handled by {this}");
+                        if (!write.IsTransactionLeader) throw new InvalidOperationException(@$"Ensure there is no parent transaction so errors can correctly be handled by {this}");
 
-                        var existing = CheckForExisting(item);
+                        if (!checkedExisting)
+                            existing = CheckForExisting(item);
 
                         if (existing != null)
                         {
                             if (CanReuseExisting(existing, item))
                             {
                                 Undelete(existing);
-                                LogForModel(item, $"Found existing {HumanisedModelName} for {item} (ID {existing.ID}) – skipping import.");
+                                LogForModel(item, @$"Found existing {HumanisedModelName} for {item} (ID {existing.ID}) – skipping import.");
                                 // existing item will be used; rollback new import and exit early.
                                 rollback();
                                 flushEvents(true);
                                 return existing;
                             }
 
+                            LogForModel(item, @"Found existing but failed re-use check.");
                             Delete(existing);
                             ModelStore.PurgeDeletable(s => s.ID == existing.ID);
                         }
@@ -403,12 +441,12 @@ namespace osu.Game.Database
                     }
                 }
 
-                LogForModel(item, "Import successfully completed!");
+                LogForModel(item, @"Import successfully completed!");
             }
             catch (Exception e)
             {
                 if (!(e is TaskCanceledException))
-                    LogForModel(item, "Database import or population failed and has been rolled back.", e);
+                    LogForModel(item, @"Database import or population failed and has been rolled back.", e);
 
                 rollback();
                 flushEvents(false);
@@ -428,7 +466,7 @@ namespace osu.Game.Database
             var retrievedItem = ModelStore.ConsumableItems.FirstOrDefault(s => s.ID == item.ID);
 
             if (retrievedItem == null)
-                throw new ArgumentException("Specified model could not be found", nameof(item));
+                throw new ArgumentException(@"Specified model could not be found", nameof(item));
 
             using (var outputStream = exportStorage.GetStream($"{getValidFilename(item.ToString())}{HandledExtensions.First()}", FileAccess.Write, FileMode.Create))
                 ExportModelTo(retrievedItem, outputStream);
@@ -637,6 +675,22 @@ namespace osu.Game.Database
             }
         }
 
+        private string computeHashFast(ArchiveReader reader)
+        {
+            MemoryStream hashable = new MemoryStream();
+
+            foreach (var file in reader.Filenames.Where(f => HashableFileTypes.Any(ext => f.EndsWith(ext, StringComparison.OrdinalIgnoreCase))).OrderBy(f => f))
+            {
+                using (Stream s = reader.GetStream(file))
+                    s.CopyTo(hashable);
+            }
+
+            if (hashable.Length > 0)
+                return hashable.ComputeSHA2Hash();
+
+            return reader.Name.ComputeSHA2Hash();
+        }
+
         /// <summary>
         /// Create all required <see cref="IO.FileInfo"/>s for the provided archive, adding them to the global file store.
         /// </summary>
@@ -644,18 +698,14 @@ namespace osu.Game.Database
         {
             var fileInfos = new List<TFileModel>();
 
-            string prefix = reader.Filenames.GetCommonPrefix();
-            if (!(prefix.EndsWith('/') || prefix.EndsWith('\\')))
-                prefix = string.Empty;
-
             // import files to manager
-            foreach (string file in reader.Filenames)
+            foreach (var filenames in getShortenedFilenames(reader))
             {
-                using (Stream s = reader.GetStream(file))
+                using (Stream s = reader.GetStream(filenames.original))
                 {
                     fileInfos.Add(new TFileModel
                     {
-                        Filename = file.Substring(prefix.Length).ToStandardisedPath(),
+                        Filename = filenames.shortened,
                         FileInfo = files.Add(s)
                     });
                 }
@@ -664,6 +714,17 @@ namespace osu.Game.Database
             return fileInfos;
         }
 
+        private IEnumerable<(string original, string shortened)> getShortenedFilenames(ArchiveReader reader)
+        {
+            string prefix = reader.Filenames.GetCommonPrefix();
+            if (!(prefix.EndsWith('/') || prefix.EndsWith('\\')))
+                prefix = string.Empty;
+
+            // import files to manager
+            foreach (string file in reader.Filenames)
+                yield return (file, file.Substring(prefix.Length).ToStandardisedPath());
+        }
+
         #region osu-stable import
 
         /// <summary>
@@ -696,7 +757,7 @@ namespace osu.Game.Database
             {
                 string fullPath = storage.GetFullPath(ImportFromStablePath);
 
-                Logger.Log($"Folder \"{fullPath}\" not available in the target osu!stable installation to import {HumanisedModelName}s.", LoggingTarget.Information, LogLevel.Error);
+                Logger.Log(@$"Folder ""{fullPath}"" not available in the target osu!stable installation to import {HumanisedModelName}s.", LoggingTarget.Information, LogLevel.Error);
                 return Task.CompletedTask;
             }
 
@@ -727,7 +788,7 @@ namespace osu.Game.Database
         /// <param name="model">The model to populate.</param>
         /// <param name="archive">The archive to use as a reference for population. May be null.</param>
         /// <param name="cancellationToken">An optional cancellation token.</param>
-        protected virtual Task Populate(TModel model, [CanBeNull] ArchiveReader archive, CancellationToken cancellationToken = default) => Task.CompletedTask;
+        protected abstract Task Populate(TModel model, [CanBeNull] ArchiveReader archive, CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Perform any final actions before the import to database executes.
@@ -744,6 +805,15 @@ namespace osu.Game.Database
         /// <returns>An existing model which matches the criteria to skip importing, else null.</returns>
         protected TModel CheckForExisting(TModel model) => model.Hash == null ? null : ModelStore.ConsumableItems.FirstOrDefault(b => b.Hash == model.Hash);
 
+        /// <summary>
+        /// Whether inport can be skipped after finding an existing import early in the process.
+        /// Only valid when <see cref="ComputeHash"/> is not overridden.
+        /// </summary>
+        /// <param name="existing">The existing model.</param>
+        /// <param name="import">The newly imported model.</param>
+        /// <returns>Whether to skip this import completely.</returns>
+        protected virtual bool CanSkipImport(TModel existing, TModel import) => true;
+
         /// <summary>
         /// After an existing <typeparamref name="TModel"/> is found during an import process, the default behaviour is to use/restore the existing
         /// item and skip the import. This method allows changing that behaviour.
@@ -771,7 +841,7 @@ namespace osu.Game.Database
 
         private DbSet<TModel> queryModel() => ContextFactory.Get().Set<TModel>();
 
-        protected virtual string HumanisedModelName => $"{typeof(TModel).Name.Replace("Info", "").ToLower()}";
+        protected virtual string HumanisedModelName => $"{typeof(TModel).Name.Replace(@"Info", "").ToLower()}";
 
         #region Event handling / delaying
 

osu.Game/Database/RealmContextFactory.cs

@@ -26,6 +26,11 @@ namespace osu.Game.Database
         /// </summary>
         private readonly object writeLock = new object();
 
+        /// <summary>
+        /// Lock object which is held during <see cref="BlockAllOperations"/> sections.
+        /// </summary>
+        private readonly SemaphoreSlim blockingLock = new SemaphoreSlim(1);
+
         private static readonly GlobalStatistic<int> reads = GlobalStatistics.Get<int>("Realm", "Get (Read)");
         private static readonly GlobalStatistic<int> writes = GlobalStatistics.Get<int>("Realm", "Get (Write)");
         private static readonly GlobalStatistic<int> refreshes = GlobalStatistics.Get<int>("Realm", "Dirty Refreshes");
@@ -33,17 +38,12 @@ namespace osu.Game.Database
         private static readonly GlobalStatistic<int> pending_writes = GlobalStatistics.Get<int>("Realm", "Pending writes");
         private static readonly GlobalStatistic<int> active_usages = GlobalStatistics.Get<int>("Realm", "Active usages");
 
-        private readonly ManualResetEventSlim blockingResetEvent = new ManualResetEventSlim(true);
-
         private Realm context;
 
         public Realm Context
         {
             get
             {
-                if (IsDisposed)
-                    throw new InvalidOperationException($"Attempted to access {nameof(Context)} on a disposed context factory");
-
                 if (context == null)
                 {
                     context = createContext();
@@ -64,7 +64,7 @@ namespace osu.Game.Database
         public RealmUsage GetForRead()
         {
             reads.Value++;
-            return new RealmUsage(this);
+            return new RealmUsage(createContext());
         }
 
         public RealmWriteUsage GetForWrite()
@@ -73,8 +73,34 @@ namespace osu.Game.Database
             pending_writes.Value++;
 
             Monitor.Enter(writeLock);
+            return new RealmWriteUsage(createContext(), writeComplete);
+        }
 
-            return new RealmWriteUsage(this);
+        /// <summary>
+        /// Flush any active contexts and block any further writes.
+        /// </summary>
+        /// <remarks>
+        /// This should be used in places we need to ensure no ongoing reads/writes are occurring with realm.
+        /// ie. to move the realm backing file to a new location.
+        /// </remarks>
+        /// <returns>An <see cref="IDisposable"/> which should be disposed to end the blocking section.</returns>
+        public IDisposable BlockAllOperations()
+        {
+            if (IsDisposed)
+                throw new ObjectDisposedException(nameof(RealmContextFactory));
+
+            Logger.Log(@"Blocking realm operations.", LoggingTarget.Database);
+
+            blockingLock.Wait();
+            flushContexts();
+
+            return new InvokeOnDisposal<RealmContextFactory>(this, endBlockingSection);
+
+            static void endBlockingSection(RealmContextFactory factory)
+            {
+                factory.blockingLock.Release();
+                Logger.Log(@"Restoring realm operations.", LoggingTarget.Database);
+            }
         }
 
         protected override void Update()
@@ -87,15 +113,31 @@ namespace osu.Game.Database
 
         private Realm createContext()
         {
-            blockingResetEvent.Wait();
-
-            contexts_created.Value++;
-
-            return Realm.GetInstance(new RealmConfiguration(storage.GetFullPath($"{database_name}.realm", true))
+            try
             {
-                SchemaVersion = schema_version,
-                MigrationCallback = onMigration,
-            });
+                if (IsDisposed)
+                    throw new ObjectDisposedException(nameof(RealmContextFactory));
+
+                blockingLock.Wait();
+
+                contexts_created.Value++;
+
+                return Realm.GetInstance(new RealmConfiguration(storage.GetFullPath($"{database_name}.realm", true))
+                {
+                    SchemaVersion = schema_version,
+                    MigrationCallback = onMigration,
+                });
+            }
+            finally
+            {
+                blockingLock.Release();
+            }
+        }
+
+        private void writeComplete()
+        {
+            Monitor.Exit(writeLock);
+            pending_writes.Value--;
         }
 
         private void onMigration(Migration migration, ulong lastSchemaVersion)
@@ -109,28 +151,10 @@ namespace osu.Game.Database
             }
         }
 
-        protected override void Dispose(bool isDisposing)
-        {
-            base.Dispose(isDisposing);
-
-            BlockAllOperations();
-        }
-
-        public IDisposable BlockAllOperations()
-        {
-            blockingResetEvent.Reset();
-            flushContexts();
-
-            return new InvokeOnDisposal<RealmContextFactory>(this, r => endBlockingSection());
-        }
-
-        private void endBlockingSection()
-        {
-            blockingResetEvent.Set();
-        }
-
         private void flushContexts()
         {
+            Logger.Log(@"Flushing realm contexts...", LoggingTarget.Database);
+
             var previousContext = context;
             context = null;
 
@@ -139,6 +163,20 @@ namespace osu.Game.Database
                 Thread.Sleep(50);
 
             previousContext?.Dispose();
+
+            Logger.Log(@"Realm contexts flushed.", LoggingTarget.Database);
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            if (!IsDisposed)
+            {
+                // intentionally block all operations indefinitely. this ensures that nothing can start consuming a new context after disposal.
+                BlockAllOperations();
+                blockingLock?.Dispose();
+            }
+
+            base.Dispose(isDisposing);
         }
 
         /// <summary>
@@ -148,13 +186,10 @@ namespace osu.Game.Database
         {
             public readonly Realm Realm;
 
-            protected readonly RealmContextFactory Factory;
-
-            internal RealmUsage(RealmContextFactory factory)
+            internal RealmUsage(Realm context)
             {
                 active_usages.Value++;
-                Factory = factory;
-                Realm = factory.createContext();
+                Realm = context;
             }
 
             /// <summary>
@@ -172,11 +207,13 @@ namespace osu.Game.Database
         /// </summary>
         public class RealmWriteUsage : RealmUsage
         {
+            private readonly Action onWriteComplete;
             private readonly Transaction transaction;
 
-            internal RealmWriteUsage(RealmContextFactory factory)
-                : base(factory)
+            internal RealmWriteUsage(Realm context, Action onWriteComplete)
+                : base(context)
             {
+                this.onWriteComplete = onWriteComplete;
                 transaction = Realm.BeginWrite();
             }
 
@@ -200,8 +237,7 @@ namespace osu.Game.Database
 
                 base.Dispose();
 
-                Monitor.Exit(Factory.writeLock);
-                pending_writes.Value--;
+                onWriteComplete();
             }
         }
     }

osu.Game/Graphics/Containers/Markdown/OsuMarkdownImage.cs

@@ -4,12 +4,13 @@
 using Markdig.Syntax.Inlines;
 using osu.Framework.Graphics.Containers.Markdown;
 using osu.Framework.Graphics.Cursor;
+using osu.Framework.Localisation;
 
 namespace osu.Game.Graphics.Containers.Markdown
 {
     public class OsuMarkdownImage : MarkdownImage, IHasTooltip
     {
-        public string TooltipText { get; }
+        public LocalisableString TooltipText { get; }
 
         public OsuMarkdownImage(LinkInline linkInline)
             : base(linkInline.Url)

osu.Game/Graphics/Containers/OsuClickableContainer.cs

@@ -5,6 +5,7 @@ using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
+using osu.Framework.Localisation;
 using osu.Game.Graphics.UserInterface;
 
 namespace osu.Game.Graphics.Containers
@@ -24,7 +25,7 @@ namespace osu.Game.Graphics.Containers
             this.sampleSet = sampleSet;
         }
 
-        public virtual string TooltipText { get; set; }
+        public virtual LocalisableString TooltipText { get; set; }
 
         [BackgroundDependencyLoader]
         private void load()

osu.Game/Graphics/Cursor/OsuTooltipContainer.cs

@@ -9,6 +9,7 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Effects;
 using osu.Framework.Graphics.Shapes;
+using osu.Framework.Localisation;
 using osu.Game.Graphics.Sprites;
 
 namespace osu.Game.Graphics.Cursor
@@ -32,7 +33,7 @@ namespace osu.Game.Graphics.Cursor
 
             public override bool SetContent(object content)
             {
-                if (!(content is string contentString))
+                if (!(content is LocalisableString contentString))
                     return false;
 
                 if (contentString == text.Text) return true;

osu.Game/Graphics/UserInterface/ExternalLinkButton.cs

@@ -7,6 +7,7 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Input.Events;
+using osu.Framework.Localisation;
 using osu.Framework.Platform;
 using osuTK;
 using osuTK.Graphics;
@@ -58,6 +59,6 @@ namespace osu.Game.Graphics.UserInterface
             return true;
         }
 
-        public string TooltipText => "view in browser";
+        public LocalisableString TooltipText => "view in browser";
     }
 }

osu.Game/Graphics/UserInterface/OsuPasswordTextBox.cs

@@ -12,6 +12,7 @@ using osu.Framework.Graphics.Shapes;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Input;
 using osu.Framework.Input.Events;
+using osu.Framework.Localisation;
 using osu.Framework.Platform;
 
 namespace osu.Game.Graphics.UserInterface
@@ -105,7 +106,7 @@ namespace osu.Game.Graphics.UserInterface
 
         private class CapsWarning : SpriteIcon, IHasTooltip
         {
-            public string TooltipText => @"caps lock is active";
+            public LocalisableString TooltipText => "caps lock is active";
 
             public CapsWarning()
             {

osu.Game/Graphics/UserInterface/OsuSliderBar.cs

@@ -14,6 +14,7 @@ using osu.Framework.Graphics.UserInterface;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.Events;
+using osu.Framework.Localisation;
 
 namespace osu.Game.Graphics.UserInterface
 {
@@ -34,7 +35,7 @@ namespace osu.Game.Graphics.UserInterface
         private readonly Box rightBox;
         private readonly Container nubContainer;
 
-        public virtual string TooltipText { get; private set; }
+        public virtual LocalisableString TooltipText { get; private set; }
 
         /// <summary>
         /// Whether to format the tooltip as a percentage or the actual value.

osu.Game/Online/API/Requests/PostMessageRequest.cs

@@ -9,11 +9,11 @@ namespace osu.Game.Online.API.Requests
 {
     public class PostMessageRequest : APIRequest<Message>
     {
-        private readonly Message message;
+        public readonly Message Message;
 
         public PostMessageRequest(Message message)
         {
-            this.message = message;
+            Message = message;
         }
 
         protected override WebRequest CreateWebRequest()
@@ -21,12 +21,12 @@ namespace osu.Game.Online.API.Requests
             var req = base.CreateWebRequest();
 
             req.Method = HttpMethod.Post;
-            req.AddParameter(@"is_action", message.IsAction.ToString().ToLowerInvariant());
-            req.AddParameter(@"message", message.Content);
+            req.AddParameter(@"is_action", Message.IsAction.ToString().ToLowerInvariant());
+            req.AddParameter(@"message", Message.Content);
 
             return req;
         }
 
-        protected override string Target => $@"chat/channels/{message.ChannelId}/messages";
+        protected override string Target => $@"chat/channels/{Message.ChannelId}/messages";
     }
 }

osu.Game/Online/Chat/ChannelManager.cs

@@ -225,7 +225,7 @@ namespace osu.Game.Online.Chat
             switch (command)
             {
                 case "np":
-                    AddInternal(new NowPlayingCommand());
+                    AddInternal(new NowPlayingCommand(target));
                     break;
 
                 case "me":
@@ -235,7 +235,7 @@ namespace osu.Game.Online.Chat
                         break;
                     }
 
-                    PostMessage(content, true);
+                    PostMessage(content, true, target);
                     break;
 
                 case "join":

osu.Game/Online/Chat/NowPlayingCommand.cs

@@ -21,6 +21,17 @@ namespace osu.Game.Online.Chat
         [Resolved]
         private Bindable<WorkingBeatmap> currentBeatmap { get; set; }
 
+        private readonly Channel target;
+
+        /// <summary>
+        /// Creates a new <see cref="NowPlayingCommand"/> to post the currently-playing beatmap to a parenting <see cref="IChannelPostTarget"/>.
+        /// </summary>
+        /// <param name="target">The target channel to post to. If <c>null</c>, the currently-selected channel will be posted to.</param>
+        public NowPlayingCommand(Channel target = null)
+        {
+            this.target = target;
+        }
+
         protected override void LoadComplete()
         {
             base.LoadComplete();
@@ -48,7 +59,7 @@ namespace osu.Game.Online.Chat
 
             var beatmapString = beatmap.OnlineBeatmapID.HasValue ? $"[{api.WebsiteRootUrl}/b/{beatmap.OnlineBeatmapID} {beatmap}]" : beatmap.ToString();
 
-            channelManager.PostMessage($"is {verb} {beatmapString}", true);
+            channelManager.PostMessage($"is {verb} {beatmapString}", true, target);
             Expire();
         }
     }

osu.Game/Online/Leaderboards/LeaderboardScore.cs

@@ -13,6 +13,7 @@ using osu.Framework.Graphics.Shapes;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.UserInterface;
 using osu.Framework.Input.Events;
+using osu.Framework.Localisation;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.Sprites;
@@ -295,7 +296,7 @@ namespace osu.Game.Online.Leaderboards
 
             public override bool Contains(Vector2 screenSpacePos) => content.Contains(screenSpacePos);
 
-            public string TooltipText { get; }
+            public LocalisableString TooltipText { get; }
 
             public ScoreComponentLabel(LeaderboardScoreStatistic statistic)
             {
@@ -365,7 +366,7 @@ namespace osu.Game.Online.Leaderboards
                 };
             }
 
-            public string TooltipText { get; }
+            public LocalisableString TooltipText { get; }
         }
 
         public class LeaderboardScoreStatistic

osu.Game/OsuGameBase.cs

@@ -24,6 +24,7 @@ using osu.Framework.Graphics.Performance;
 using osu.Framework.Graphics.Textures;
 using osu.Framework.Input;
 using osu.Framework.Logging;
+using osu.Framework.Threading;
 using osu.Game.Audio;
 using osu.Game.Database;
 using osu.Game.Input;
@@ -156,6 +157,8 @@ namespace osu.Game
 
         private readonly BindableNumber<double> globalTrackVolumeAdjust = new BindableNumber<double>(GLOBAL_TRACK_VOLUME_ADJUST);
 
+        private IBindable<GameThreadState> updateThreadState;
+
         public OsuGameBase()
         {
             UseDevelopmentServer = DebugUtils.IsDebugBuild;
@@ -182,6 +185,10 @@ namespace osu.Game
             dependencies.Cache(contextFactory = new DatabaseContextFactory(Storage));
 
             dependencies.Cache(realmFactory = new RealmContextFactory(Storage));
+
+            updateThreadState = Host.UpdateThread.State.GetBoundCopy();
+            updateThreadState.BindValueChanged(updateThreadStateChanged);
+
             AddInternal(realmFactory);
 
             dependencies.CacheAs(Storage);
@@ -356,6 +363,23 @@ namespace osu.Game
             Ruleset.BindValueChanged(onRulesetChanged);
         }
 
+        private IDisposable blocking;
+
+        private void updateThreadStateChanged(ValueChangedEvent<GameThreadState> state)
+        {
+            switch (state.NewValue)
+            {
+                case GameThreadState.Running:
+                    blocking?.Dispose();
+                    blocking = null;
+                    break;
+
+                case GameThreadState.Paused:
+                    blocking = realmFactory.BlockAllOperations();
+                    break;
+            }
+        }
+
         protected override void LoadComplete()
         {
             base.LoadComplete();
@@ -398,11 +422,15 @@ namespace osu.Game
 
         public void Migrate(string path)
         {
+            Logger.Log($@"Migrating osu! data from ""{Storage.GetFullPath(string.Empty)}"" to ""{path}""...");
+
             using (realmFactory.BlockAllOperations())
             {
                 contextFactory.FlushConnections();
                 (Storage as OsuStorage)?.Migrate(Host.GetStorage(path));
             }
+
+            Logger.Log(@"Migration complete!");
         }
 
         protected override UserInputManager CreateUserInputManager() => new OsuUserInputManager();

osu.Game/Overlays/BeatmapListing/BeatmapListingFilterControl.cs

@@ -10,11 +10,13 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Effects;
 using osu.Framework.Graphics.Shapes;
+using osu.Framework.Localisation;
 using osu.Framework.Threading;
 using osu.Game.Beatmaps;
 using osu.Game.Online.API;
 using osu.Game.Online.API.Requests;
 using osu.Game.Rulesets;
+using osu.Game.Resources.Localisation.Web;
 using osuTK;
 using osuTK.Graphics;
 
@@ -23,9 +25,9 @@ namespace osu.Game.Overlays.BeatmapListing
     public class BeatmapListingFilterControl : CompositeDrawable
     {
         /// <summary>
-        /// Fired when a search finishes. Contains only new items in the case of pagination.
+        /// Fired when a search finishes.
         /// </summary>
-        public Action<List<BeatmapSetInfo>> SearchFinished;
+        public Action<SearchResult> SearchFinished;
 
         /// <summary>
         /// Fired when search criteria change.
@@ -212,7 +214,25 @@ namespace osu.Game.Overlays.BeatmapListing
                 lastResponse = response;
                 getSetsRequest = null;
 
-                SearchFinished?.Invoke(sets);
+                // check if a non-supporter used supporter-only filters
+                if (!api.LocalUser.Value.IsSupporter)
+                {
+                    List<LocalisableString> filters = new List<LocalisableString>();
+
+                    if (searchControl.Played.Value != SearchPlayed.Any)
+                        filters.Add(BeatmapsStrings.ListingSearchFiltersPlayed);
+
+                    if (searchControl.Ranks.Any())
+                        filters.Add(BeatmapsStrings.ListingSearchFiltersRank);
+
+                    if (filters.Any())
+                    {
+                        SearchFinished?.Invoke(SearchResult.SupporterOnlyFilters(filters));
+                        return;
+                    }
+                }
+
+                SearchFinished?.Invoke(SearchResult.ResultsReturned(sets));
             };
 
             api.Queue(getSetsRequest);
@@ -237,5 +257,53 @@ namespace osu.Game.Overlays.BeatmapListing
 
             base.Dispose(isDisposing);
         }
+
+        /// <summary>
+        /// Indicates the type of result of a user-requested beatmap search.
+        /// </summary>
+        public enum SearchResultType
+        {
+            /// <summary>
+            /// Actual results have been returned from API.
+            /// </summary>
+            ResultsReturned,
+
+            /// <summary>
+            /// The user is not a supporter, but used supporter-only search filters.
+            /// </summary>
+            SupporterOnlyFilters
+        }
+
+        /// <summary>
+        /// Describes the result of a user-requested beatmap search.
+        /// </summary>
+        public struct SearchResult
+        {
+            public SearchResultType Type { get; private set; }
+
+            /// <summary>
+            /// Contains the beatmap sets returned from API.
+            /// Valid for read if and only if <see cref="Type"/> is <see cref="SearchResultType.ResultsReturned"/>.
+            /// </summary>
+            public List<BeatmapSetInfo> Results { get; private set; }
+
+            /// <summary>
+            /// Contains the names of supporter-only filters requested by the user.
+            /// Valid for read if and only if <see cref="Type"/> is <see cref="SearchResultType.SupporterOnlyFilters"/>.
+            /// </summary>
+            public List<LocalisableString> SupporterOnlyFiltersUsed { get; private set; }
+
+            public static SearchResult ResultsReturned(List<BeatmapSetInfo> results) => new SearchResult
+            {
+                Type = SearchResultType.ResultsReturned,
+                Results = results
+            };
+
+            public static SearchResult SupporterOnlyFilters(List<LocalisableString> filters) => new SearchResult
+            {
+                Type = SearchResultType.SupporterOnlyFilters,
+                SupporterOnlyFiltersUsed = filters
+            };
+        }
     }
 }

osu.Game/Overlays/BeatmapListingOverlay.cs

@@ -7,6 +7,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using osu.Framework.Allocation;
 using osu.Framework.Extensions.IEnumerableExtensions;
+using osu.Framework.Localisation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
@@ -15,7 +16,9 @@ using osu.Framework.Graphics.Textures;
 using osu.Framework.Input.Events;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
+using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
+using osu.Game.Graphics.Containers;
 using osu.Game.Overlays.BeatmapListing;
 using osu.Game.Overlays.BeatmapListing.Panels;
 using osu.Game.Resources.Localisation.Web;
@@ -33,6 +36,7 @@ namespace osu.Game.Overlays
         private Container panelTarget;
         private FillFlowContainer<BeatmapPanel> foundContent;
         private NotFoundDrawable notFoundContent;
+        private SupporterRequiredDrawable supporterRequiredContent;
         private BeatmapListingFilterControl filterControl;
 
         public BeatmapListingOverlay()
@@ -76,6 +80,7 @@ namespace osu.Game.Overlays
                                 {
                                     foundContent = new FillFlowContainer<BeatmapPanel>(),
                                     notFoundContent = new NotFoundDrawable(),
+                                    supporterRequiredContent = new SupporterRequiredDrawable(),
                                 }
                             }
                         },
@@ -115,9 +120,16 @@ namespace osu.Game.Overlays
 
         private Task panelLoadDelegate;
 
-        private void onSearchFinished(List<BeatmapSetInfo> beatmaps)
+        private void onSearchFinished(BeatmapListingFilterControl.SearchResult searchResult)
         {
-            var newPanels = beatmaps.Select<BeatmapSetInfo, BeatmapPanel>(b => new GridBeatmapPanel(b)
+            if (searchResult.Type == BeatmapListingFilterControl.SearchResultType.SupporterOnlyFilters)
+            {
+                supporterRequiredContent.UpdateText(searchResult.SupporterOnlyFiltersUsed);
+                addContentToPlaceholder(supporterRequiredContent);
+                return;
+            }
+
+            var newPanels = searchResult.Results.Select<BeatmapSetInfo, BeatmapPanel>(b => new GridBeatmapPanel(b)
             {
                 Anchor = Anchor.TopCentre,
                 Origin = Anchor.TopCentre,
@@ -128,7 +140,7 @@ namespace osu.Game.Overlays
                 //No matches case
                 if (!newPanels.Any())
                 {
-                    LoadComponentAsync(notFoundContent, addContentToPlaceholder, (cancellationToken = new CancellationTokenSource()).Token);
+                    addContentToPlaceholder(notFoundContent);
                     return;
                 }
 
@@ -170,9 +182,9 @@ namespace osu.Game.Overlays
             {
                 var transform = lastContent.FadeOut(100, Easing.OutQuint);
 
-                if (lastContent == notFoundContent)
+                if (lastContent == notFoundContent || lastContent == supporterRequiredContent)
                 {
-                    // not found display may be used multiple times, so don't expire/dispose it.
+                    // the placeholders may be used multiple times, so don't expire/dispose them.
                     transform.Schedule(() => panelTarget.Remove(lastContent));
                 }
                 else
@@ -240,6 +252,67 @@ namespace osu.Game.Overlays
             }
         }
 
+        // TODO: localisation requires Text/LinkFlowContainer support for localising strings with links inside
+        // (https://github.com/ppy/osu-framework/issues/4530)
+        public class SupporterRequiredDrawable : CompositeDrawable
+        {
+            private LinkFlowContainer supporterRequiredText;
+
+            public SupporterRequiredDrawable()
+            {
+                RelativeSizeAxes = Axes.X;
+                Height = 225;
+                Alpha = 0;
+            }
+
+            [BackgroundDependencyLoader]
+            private void load(TextureStore textures)
+            {
+                AddInternal(new FillFlowContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    RelativeSizeAxes = Axes.Y,
+                    AutoSizeAxes = Axes.X,
+                    Direction = FillDirection.Horizontal,
+                    Children = new Drawable[]
+                    {
+                        new Sprite
+                        {
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                            RelativeSizeAxes = Axes.Both,
+                            FillMode = FillMode.Fit,
+                            Texture = textures.Get(@"Online/supporter-required"),
+                        },
+                        supporterRequiredText = new LinkFlowContainer
+                        {
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                            AutoSizeAxes = Axes.Both,
+                            Margin = new MarginPadding { Bottom = 10 },
+                        },
+                    }
+                });
+            }
+
+            public void UpdateText(List<LocalisableString> filters)
+            {
+                supporterRequiredText.Clear();
+
+                supporterRequiredText.AddText(
+                    BeatmapsStrings.ListingSearchSupporterFilterQuoteDefault(string.Join(" and ", filters), "").ToString(),
+                    t =>
+                    {
+                        t.Font = OsuFont.GetFont(size: 16);
+                        t.Colour = Colour4.White;
+                    }
+                );
+
+                supporterRequiredText.AddLink(BeatmapsStrings.ListingSearchSupporterFilterQuoteLinkText.ToString(), @"/store/products/supporter-tag");
+            }
+        }
+
         private const double time_between_fetches = 500;
 
         private double lastFetchDisplayedTime;

osu.Game/Overlays/BeatmapSet/BasicStats.cs

@@ -95,7 +95,7 @@ namespace osu.Game.Overlays.BeatmapSet
         {
             private readonly OsuSpriteText value;
 
-            public string TooltipText { get; }
+            public LocalisableString TooltipText { get; }
 
             public LocalisableString Value
             {

osu.Game/Overlays/BeatmapSet/Buttons/FavouriteButton.cs

@@ -7,6 +7,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Localisation;
 using osu.Game.Beatmaps;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Online.API;
@@ -28,7 +29,7 @@ namespace osu.Game.Overlays.BeatmapSet.Buttons
 
         private readonly IBindable<User> localUser = new Bindable<User>();
 
-        public string TooltipText
+        public LocalisableString TooltipText
         {
             get
             {

osu.Game/Overlays/BeatmapSet/Buttons/HeaderDownloadButton.cs

@@ -7,6 +7,7 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Localisation;
 using osu.Game.Beatmaps;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Containers;
@@ -26,7 +27,7 @@ namespace osu.Game.Overlays.BeatmapSet.Buttons
 
         private readonly bool noVideo;
 
-        public string TooltipText => button.Enabled.Value ? "download this beatmap" : "login to download";
+        public LocalisableString TooltipText => button.Enabled.Value ? "download this beatmap" : "login to download";
 
         private readonly IBindable<User> localUser = new Bindable<User>();
 

osu.Game/Overlays/Comments/DrawableComment.cs

@@ -20,6 +20,7 @@ using System;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Extensions.IEnumerableExtensions;
 using System.Collections.Specialized;
+using osu.Framework.Localisation;
 using osu.Game.Overlays.Comments.Buttons;
 
 namespace osu.Game.Overlays.Comments
@@ -395,7 +396,7 @@ namespace osu.Game.Overlays.Comments
 
         private class ParentUsername : FillFlowContainer, IHasTooltip
         {
-            public string TooltipText => getParentMessage();
+            public LocalisableString TooltipText => getParentMessage();
 
             private readonly Comment parentComment;
 
@@ -427,7 +428,7 @@ namespace osu.Game.Overlays.Comments
                 if (parentComment == null)
                     return string.Empty;
 
-                return parentComment.HasMessage ? parentComment.Message : parentComment.IsDeleted ? @"deleted" : string.Empty;
+                return parentComment.HasMessage ? parentComment.Message : parentComment.IsDeleted ? "deleted" : string.Empty;
             }
         }
     }

osu.Game/Overlays/Mods/ModButton.cs

@@ -14,6 +14,7 @@ using System;
 using System.Linq;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Input.Events;
+using osu.Framework.Localisation;
 using osu.Game.Graphics;
 using osu.Game.Graphics.UserInterface;
 
@@ -34,7 +35,7 @@ namespace osu.Game.Overlays.Mods
         /// </summary>
         public Action<Mod> SelectionChanged;
 
-        public string TooltipText => (SelectedMod?.Description ?? Mods.FirstOrDefault()?.Description) ?? string.Empty;
+        public LocalisableString TooltipText => (SelectedMod?.Description ?? Mods.FirstOrDefault()?.Description) ?? string.Empty;
 
         private const Easing mod_switch_easing = Easing.InOutSine;
         private const double mod_switch_duration = 120;

osu.Game/Overlays/OverlayPanelDisplayStyleControl.cs

@@ -11,6 +11,7 @@ using osu.Game.Graphics.UserInterface;
 using osu.Framework.Allocation;
 using osuTK.Graphics;
 using osu.Framework.Graphics.Cursor;
+using osu.Framework.Localisation;
 
 namespace osu.Game.Overlays
 {
@@ -56,7 +57,7 @@ namespace osu.Game.Overlays
             [Resolved]
             private OverlayColourProvider colourProvider { get; set; }
 
-            public string TooltipText => $@"{Value} view";
+            public LocalisableString TooltipText => $@"{Value} view";
 
             private readonly SpriteIcon icon;
 

osu.Game/Overlays/Profile/Header/Components/DrawableBadge.cs

@@ -7,6 +7,7 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.Textures;
+using osu.Framework.Localisation;
 using osu.Game.Users;
 using osuTK;
 
@@ -42,6 +43,6 @@ namespace osu.Game.Overlays.Profile.Header.Components
             InternalChild.FadeInFromZero(200);
         }
 
-        public string TooltipText => badge.Description;
+        public LocalisableString TooltipText => badge.Description;
     }
 }

osu.Game/Overlays/Profile/Header/Components/ExpandDetailsButton.cs

@@ -6,6 +6,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Localisation;
 using osuTK;
 
 namespace osu.Game.Overlays.Profile.Header.Components
@@ -14,7 +15,7 @@ namespace osu.Game.Overlays.Profile.Header.Components
     {
         public readonly BindableBool DetailsVisible = new BindableBool();
 
-        public override string TooltipText => DetailsVisible.Value ? "collapse" : "expand";
+        public override LocalisableString TooltipText => DetailsVisible.Value ? "collapse" : "expand";
 
         private SpriteIcon icon;
 

osu.Game/Overlays/Profile/Header/Components/FollowersButton.cs

@@ -4,6 +4,7 @@
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Localisation;
 using osu.Game.Users;
 
 namespace osu.Game.Overlays.Profile.Header.Components
@@ -12,7 +13,7 @@ namespace osu.Game.Overlays.Profile.Header.Components
     {
         public readonly Bindable<User> User = new Bindable<User>();
 
-        public override string TooltipText => "followers";
+        public override LocalisableString TooltipText => "followers";
 
         protected override IconUsage Icon => FontAwesome.Solid.User;
 

osu.Game/Overlays/Profile/Header/Components/LevelBadge.cs

@@ -8,6 +8,7 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.Textures;
+using osu.Framework.Localisation;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Users;
@@ -18,7 +19,7 @@ namespace osu.Game.Overlays.Profile.Header.Components
     {
         public readonly Bindable<User> User = new Bindable<User>();
 
-        public string TooltipText { get; }
+        public LocalisableString TooltipText { get; }
 
         private OsuSpriteText levelText;
 

osu.Game/Overlays/Profile/Header/Components/LevelProgressBar.cs

@@ -6,6 +6,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
+using osu.Framework.Localisation;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Graphics.UserInterface;
@@ -18,7 +19,7 @@ namespace osu.Game.Overlays.Profile.Header.Components
     {
         public readonly Bindable<User> User = new Bindable<User>();
 
-        public string TooltipText { get; }
+        public LocalisableString TooltipText { get; }
 
         private Bar levelProgressBar;
         private OsuSpriteText levelProgressText;

osu.Game/Overlays/Profile/Header/Components/MappingSubscribersButton.cs

@@ -4,6 +4,7 @@
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Localisation;
 using osu.Game.Users;
 
 namespace osu.Game.Overlays.Profile.Header.Components
@@ -12,7 +13,7 @@ namespace osu.Game.Overlays.Profile.Header.Components
     {
         public readonly Bindable<User> User = new Bindable<User>();
 
-        public override string TooltipText => "mapping subscribers";
+        public override LocalisableString TooltipText => "mapping subscribers";
 
         protected override IconUsage Icon => FontAwesome.Solid.Bell;
 

osu.Game/Overlays/Profile/Header/Components/MessageUserButton.cs

@@ -5,6 +5,7 @@ using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Localisation;
 using osu.Game.Online.API;
 using osu.Game.Online.Chat;
 using osu.Game.Users;
@@ -16,7 +17,7 @@ namespace osu.Game.Overlays.Profile.Header.Components
     {
         public readonly Bindable<User> User = new Bindable<User>();
 
-        public override string TooltipText => "send message";
+        public override LocalisableString TooltipText => "send message";
 
         [Resolved(CanBeNull = true)]
         private ChannelManager channelManager { get; set; }

osu.Game/Overlays/Profile/Header/Components/OverlinedTotalPlayTime.cs

@@ -6,6 +6,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
+using osu.Framework.Localisation;
 using osu.Game.Users;
 
 namespace osu.Game.Overlays.Profile.Header.Components
@@ -14,7 +15,7 @@ namespace osu.Game.Overlays.Profile.Header.Components
     {
         public readonly Bindable<User> User = new Bindable<User>();
 
-        public string TooltipText { get; set; }
+        public LocalisableString TooltipText { get; set; }
 
         private OverlinedInfoContainer info;
 

osu.Game/Overlays/Profile/Header/Components/SupporterIcon.cs

@@ -8,6 +8,7 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Localisation;
 using osu.Game.Graphics;
 
 namespace osu.Game.Overlays.Profile.Header.Components
@@ -18,7 +19,7 @@ namespace osu.Game.Overlays.Profile.Header.Components
         private readonly FillFlowContainer iconContainer;
         private readonly CircularContainer content;
 
-        public string TooltipText => "osu!supporter";
+        public LocalisableString TooltipText => "osu!supporter";
 
         public int SupportLevel
         {

osu.Game/Overlays/Profile/Sections/Historical/DrawableMostPlayedBeatmap.cs

@@ -143,7 +143,7 @@ namespace osu.Game.Overlays.Profile.Sections.Historical
 
         private class PlayCountText : CompositeDrawable, IHasTooltip
         {
-            public string TooltipText => "times played";
+            public LocalisableString TooltipText => "times played";
 
             public PlayCountText(int playCount)
             {

osu.Game/Overlays/RestoreDefaultValueButton.cs

@@ -10,6 +10,7 @@ using osu.Framework.Graphics.Cursor;
 using osu.Framework.Graphics.Effects;
 using osu.Framework.Graphics.UserInterface;
 using osu.Framework.Input.Events;
+using osu.Framework.Localisation;
 using osu.Game.Graphics;
 using osu.Game.Graphics.UserInterface;
 
@@ -76,7 +77,7 @@ namespace osu.Game.Overlays
             UpdateState();
         }
 
-        public string TooltipText => "revert to default";
+        public LocalisableString TooltipText => "revert to default";
 
         protected override bool OnHover(HoverEvent e)
         {

osu.Game/Overlays/Settings/OutlinedTextBox.cs

@@ -0,0 +1,49 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Allocation;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Input.Events;
+using osu.Game.Graphics;
+using osu.Game.Graphics.UserInterface;
+using osuTK.Graphics;
+
+namespace osu.Game.Overlays.Settings
+{
+    public class OutlinedTextBox : OsuTextBox
+    {
+        private const float border_thickness = 3;
+
+        private Color4 borderColourFocused;
+        private Color4 borderColourUnfocused;
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colour)
+        {
+            borderColourUnfocused = colour.Gray4.Opacity(0.5f);
+            borderColourFocused = BorderColour;
+
+            updateBorder();
+        }
+
+        protected override void OnFocus(FocusEvent e)
+        {
+            base.OnFocus(e);
+
+            updateBorder();
+        }
+
+        protected override void OnFocusLost(FocusLostEvent e)
+        {
+            base.OnFocusLost(e);
+
+            updateBorder();
+        }
+
+        private void updateBorder()
+        {
+            BorderThickness = border_thickness;
+            BorderColour = HasFocus ? borderColourFocused : borderColourUnfocused;
+        }
+    }
+}

osu.Game/Overlays/Settings/Sections/Audio/OffsetSettings.cs

@@ -3,6 +3,7 @@
 
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
+using osu.Framework.Localisation;
 using osu.Game.Configuration;
 using osu.Game.Graphics.UserInterface;
 
@@ -32,7 +33,7 @@ namespace osu.Game.Overlays.Settings.Sections.Audio
 
         private class OffsetSlider : OsuSliderBar<double>
         {
-            public override string TooltipText => Current.Value.ToString(@"0ms");
+            public override LocalisableString TooltipText => Current.Value.ToString(@"0ms");
         }
     }
 }

osu.Game/Overlays/Settings/Sections/Graphics/LayoutSettings.cs

@@ -233,7 +233,7 @@ namespace osu.Game.Overlays.Settings.Sections.Graphics
 
         private class UIScaleSlider : OsuSliderBar<float>
         {
-            public override string TooltipText => base.TooltipText + "x";
+            public override LocalisableString TooltipText => base.TooltipText + "x";
         }
 
         private class ResolutionSettingsDropdown : SettingsDropdown<Size>

osu.Game/Overlays/Settings/Sections/Input/MouseSettings.cs

@@ -6,6 +6,7 @@ using osu.Framework.Bindables;
 using osu.Framework.Configuration;
 using osu.Framework.Graphics;
 using osu.Framework.Input.Handlers.Mouse;
+using osu.Framework.Localisation;
 using osu.Game.Configuration;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Input;
@@ -116,7 +117,7 @@ namespace osu.Game.Overlays.Settings.Sections.Input
 
         private class SensitivitySlider : OsuSliderBar<double>
         {
-            public override string TooltipText => Current.Disabled ? "enable high precision mouse to adjust sensitivity" : $"{base.TooltipText}x";
+            public override LocalisableString TooltipText => Current.Disabled ? "enable high precision mouse to adjust sensitivity" : $"{base.TooltipText}x";
         }
     }
 }

osu.Game/Overlays/Settings/Sections/SizeSlider.cs

@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using osu.Framework.Localisation;
 using osu.Game.Graphics.UserInterface;
 
 namespace osu.Game.Overlays.Settings.Sections
@@ -10,6 +11,6 @@ namespace osu.Game.Overlays.Settings.Sections
     /// </summary>
     internal class SizeSlider : OsuSliderBar<float>
     {
-        public override string TooltipText => Current.Value.ToString(@"0.##x");
+        public override LocalisableString TooltipText => Current.Value.ToString(@"0.##x");
     }
 }

osu.Game/Overlays/Settings/Sections/UserInterface/GeneralSettings.cs

@@ -3,6 +3,7 @@
 
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
+using osu.Framework.Localisation;
 using osu.Game.Configuration;
 using osu.Game.Graphics.UserInterface;
 
@@ -44,7 +45,7 @@ namespace osu.Game.Overlays.Settings.Sections.UserInterface
 
         private class TimeSlider : OsuSliderBar<float>
         {
-            public override string TooltipText => Current.Value.ToString("N0") + "ms";
+            public override LocalisableString TooltipText => Current.Value.ToString(@"N0") + "ms";
         }
     }
 }

osu.Game/Overlays/Settings/Sections/UserInterface/SongSelectSettings.cs

@@ -5,6 +5,7 @@ using System;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
+using osu.Framework.Localisation;
 using osu.Game.Configuration;
 using osu.Game.Graphics.UserInterface;
 
@@ -62,12 +63,12 @@ namespace osu.Game.Overlays.Settings.Sections.UserInterface
 
         private class MaximumStarsSlider : StarsSlider
         {
-            public override string TooltipText => Current.IsDefault ? "no limit" : base.TooltipText;
+            public override LocalisableString TooltipText => Current.IsDefault ? "no limit" : base.TooltipText;
         }
 
         private class StarsSlider : OsuSliderBar<double>
         {
-            public override string TooltipText => Current.Value.ToString(@"0.## stars");
+            public override LocalisableString TooltipText => Current.Value.ToString(@"0.## stars");
         }
     }
 }

osu.Game/Overlays/Settings/SettingsButton.cs

@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Cursor;
+using osu.Framework.Localisation;
 using osu.Game.Graphics.UserInterface;
 
 namespace osu.Game.Overlays.Settings
@@ -17,14 +18,15 @@ namespace osu.Game.Overlays.Settings
             Padding = new MarginPadding { Left = SettingsPanel.CONTENT_MARGINS, Right = SettingsPanel.CONTENT_MARGINS };
         }
 
-        public string TooltipText { get; set; }
+        public LocalisableString TooltipText { get; set; }
 
         public override IEnumerable<string> FilterTerms
         {
             get
             {
-                if (TooltipText != null)
-                    return base.FilterTerms.Append(TooltipText);
+                if (TooltipText != default)
+                    // TODO: this won't work as intended once the tooltip text is translated.
+                    return base.FilterTerms.Append(TooltipText.ToString());
 
                 return base.FilterTerms;
             }

osu.Game/Overlays/Settings/SettingsItem.cs

@@ -35,7 +35,7 @@ namespace osu.Game.Overlays.Settings
 
         public bool ShowsDefaultIndicator = true;
 
-        public string TooltipText { get; set; }
+        public LocalisableString TooltipText { get; set; }
 
         [Resolved]
         private OsuColour colours { get; set; }

osu.Game/Overlays/Settings/SettingsNumberBox.cs

@@ -1,19 +1,65 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using osu.Framework.Bindables;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.UserInterface;
 
 namespace osu.Game.Overlays.Settings
 {
-    public class SettingsNumberBox : SettingsItem<string>
+    public class SettingsNumberBox : SettingsItem<int?>
     {
-        protected override Drawable CreateControl() => new NumberBox
+        protected override Drawable CreateControl() => new NumberControl
         {
-            Margin = new MarginPadding { Top = 5 },
             RelativeSizeAxes = Axes.X,
+            Margin = new MarginPadding { Top = 5 }
         };
 
-        public class NumberBox : SettingsTextBox.TextBox
+        private sealed class NumberControl : CompositeDrawable, IHasCurrentValue<int?>
+        {
+            private readonly BindableWithCurrent<int?> current = new BindableWithCurrent<int?>();
+
+            public Bindable<int?> Current
+            {
+                get => current.Current;
+                set => current.Current = value;
+            }
+
+            public NumberControl()
+            {
+                AutoSizeAxes = Axes.Y;
+
+                OutlinedNumberBox numberBox;
+
+                InternalChildren = new[]
+                {
+                    numberBox = new OutlinedNumberBox
+                    {
+                        Margin = new MarginPadding { Top = 5 },
+                        RelativeSizeAxes = Axes.X,
+                        CommitOnFocusLost = true
+                    }
+                };
+
+                numberBox.Current.BindValueChanged(e =>
+                {
+                    int? value = null;
+
+                    if (int.TryParse(e.NewValue, out var intVal))
+                        value = intVal;
+
+                    current.Value = value;
+                });
+
+                Current.BindValueChanged(e =>
+                {
+                    numberBox.Current.Value = e.NewValue?.ToString();
+                });
+            }
+        }
+
+        private class OutlinedNumberBox : OutlinedTextBox
         {
             protected override bool CanAddCharacter(char character) => char.IsNumber(character);
         }

osu.Game/Overlays/Settings/SettingsTextBox.cs

@@ -1,60 +1,17 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using osu.Framework.Allocation;
-using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
-using osu.Framework.Input.Events;
-using osu.Game.Graphics;
-using osu.Game.Graphics.UserInterface;
-using osuTK.Graphics;
 
 namespace osu.Game.Overlays.Settings
 {
     public class SettingsTextBox : SettingsItem<string>
     {
-        protected override Drawable CreateControl() => new TextBox
+        protected override Drawable CreateControl() => new OutlinedTextBox
         {
             Margin = new MarginPadding { Top = 5 },
             RelativeSizeAxes = Axes.X,
-            CommitOnFocusLost = true,
+            CommitOnFocusLost = true
         };
-
-        public class TextBox : OsuTextBox
-        {
-            private const float border_thickness = 3;
-
-            private Color4 borderColourFocused;
-            private Color4 borderColourUnfocused;
-
-            [BackgroundDependencyLoader]
-            private void load(OsuColour colour)
-            {
-                borderColourUnfocused = colour.Gray4.Opacity(0.5f);
-                borderColourFocused = BorderColour;
-
-                updateBorder();
-            }
-
-            protected override void OnFocus(FocusEvent e)
-            {
-                base.OnFocus(e);
-
-                updateBorder();
-            }
-
-            protected override void OnFocusLost(FocusLostEvent e)
-            {
-                base.OnFocusLost(e);
-
-                updateBorder();
-            }
-
-            private void updateBorder()
-            {
-                BorderThickness = border_thickness;
-                BorderColour = HasFocus ? borderColourFocused : borderColourUnfocused;
-            }
-        }
     }
 }

osu.Game/Overlays/Toolbar/ToolbarButton.cs

@@ -159,28 +159,6 @@ namespace osu.Game.Overlays.Toolbar
             };
         }
 
-        private RealmKeyBinding realmKeyBinding;
-
-        protected override void LoadComplete()
-        {
-            base.LoadComplete();
-
-            if (Hotkey == null) return;
-
-            realmKeyBinding = realmFactory.Context.All<RealmKeyBinding>().FirstOrDefault(rkb => rkb.RulesetID == null && rkb.ActionInt == (int)Hotkey.Value);
-
-            if (realmKeyBinding != null)
-            {
-                realmKeyBinding.PropertyChanged += (sender, args) =>
-                {
-                    if (args.PropertyName == nameof(realmKeyBinding.KeyCombinationString))
-                        updateKeyBindingTooltip();
-                };
-            }
-
-            updateKeyBindingTooltip();
-        }
-
         protected override bool OnMouseDown(MouseDownEvent e) => true;
 
         protected override bool OnClick(ClickEvent e)
@@ -196,6 +174,7 @@ namespace osu.Game.Overlays.Toolbar
 
             HoverBackground.FadeIn(200);
             tooltipContainer.FadeIn(100);
+
             return base.OnHover(e);
         }
 
@@ -222,6 +201,10 @@ namespace osu.Game.Overlays.Toolbar
 
         private void updateKeyBindingTooltip()
         {
+            if (Hotkey == null) return;
+
+            var realmKeyBinding = realmFactory.Context.All<RealmKeyBinding>().FirstOrDefault(rkb => rkb.RulesetID == null && rkb.ActionInt == (int)Hotkey.Value);
+
             if (realmKeyBinding != null)
             {
                 var keyBindingString = realmKeyBinding.KeyCombination.ReadableString();

osu.Game/Rulesets/Edit/BeatmapVerifier.cs

@@ -22,6 +22,8 @@ namespace osu.Game.Rulesets.Edit
             // Audio
             new CheckAudioPresence(),
             new CheckAudioQuality(),
+            new CheckMutedObjects(),
+            new CheckFewHitsounds(),
 
             // Compose
             new CheckUnsnappedObjects(),

osu.Game/Rulesets/Edit/Checks/CheckFewHitsounds.cs

@@ -0,0 +1,164 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using System.Linq;
+using osu.Game.Audio;
+using osu.Game.Rulesets.Edit.Checks.Components;
+using osu.Game.Rulesets.Objects;
+
+namespace osu.Game.Rulesets.Edit.Checks
+{
+    public class CheckFewHitsounds : ICheck
+    {
+        /// <summary>
+        /// 2 measures (4/4) of 120 BPM, typically makes up a few patterns in the map.
+        /// This is almost always ok, but can still be useful for the mapper to make sure hitsounding coverage is good.
+        /// </summary>
+        private const int negligible_threshold_time = 4000;
+
+        /// <summary>
+        /// 4 measures (4/4) of 120 BPM, typically makes up a large portion of a section in the song.
+        /// This is ok if the section is a quiet intro, for example.
+        /// </summary>
+        private const int warning_threshold_time = 8000;
+
+        /// <summary>
+        /// 12 measures (4/4) of 120 BPM, typically makes up multiple sections in the song.
+        /// </summary>
+        private const int problem_threshold_time = 24000;
+
+        // Should pass at least this many objects without hitsounds to be considered an issue (should work for Easy diffs too).
+        private const int warning_threshold_objects = 4;
+        private const int problem_threshold_objects = 16;
+
+        public CheckMetadata Metadata { get; } = new CheckMetadata(CheckCategory.Audio, "Few or no hitsounds");
+
+        public IEnumerable<IssueTemplate> PossibleTemplates => new IssueTemplate[]
+        {
+            new IssueTemplateLongPeriodProblem(this),
+            new IssueTemplateLongPeriodWarning(this),
+            new IssueTemplateLongPeriodNegligible(this),
+            new IssueTemplateNoHitsounds(this)
+        };
+
+        private bool mapHasHitsounds;
+        private int objectsWithoutHitsounds;
+        private double lastHitsoundTime;
+
+        public IEnumerable<Issue> Run(BeatmapVerifierContext context)
+        {
+            if (!context.Beatmap.HitObjects.Any())
+                yield break;
+
+            mapHasHitsounds = false;
+            objectsWithoutHitsounds = 0;
+            lastHitsoundTime = context.Beatmap.HitObjects.First().StartTime;
+
+            var hitObjectsIncludingNested = new List<HitObject>();
+
+            foreach (var hitObject in context.Beatmap.HitObjects)
+            {
+                // Samples play on the end of objects. Some objects have nested objects to accomplish playing them elsewhere (e.g. slider head/repeat).
+                foreach (var nestedHitObject in hitObject.NestedHitObjects)
+                    hitObjectsIncludingNested.Add(nestedHitObject);
+
+                hitObjectsIncludingNested.Add(hitObject);
+            }
+
+            var hitObjectsByEndTime = hitObjectsIncludingNested.OrderBy(o => o.GetEndTime()).ToList();
+            var hitObjectCount = hitObjectsByEndTime.Count;
+
+            for (int i = 0; i < hitObjectCount; ++i)
+            {
+                var hitObject = hitObjectsByEndTime[i];
+
+                // This is used to perform an update at the end so that the period after the last hitsounded object can be an issue.
+                bool isLastObject = i == hitObjectCount - 1;
+
+                foreach (var issue in applyHitsoundUpdate(hitObject, isLastObject))
+                    yield return issue;
+            }
+
+            if (!mapHasHitsounds)
+                yield return new IssueTemplateNoHitsounds(this).Create();
+        }
+
+        private IEnumerable<Issue> applyHitsoundUpdate(HitObject hitObject, bool isLastObject = false)
+        {
+            var time = hitObject.GetEndTime();
+            bool hasHitsound = hitObject.Samples.Any(isHitsound);
+            bool couldHaveHitsound = hitObject.Samples.Any(isHitnormal);
+
+            // Only generating issues on hitsounded or last objects ensures we get one issue per long period.
+            // If there are no hitsounds we let the "No hitsounds" template take precedence.
+            if (hasHitsound || (isLastObject && mapHasHitsounds))
+            {
+                var timeWithoutHitsounds = time - lastHitsoundTime;
+
+                if (timeWithoutHitsounds > problem_threshold_time && objectsWithoutHitsounds > problem_threshold_objects)
+                    yield return new IssueTemplateLongPeriodProblem(this).Create(lastHitsoundTime, timeWithoutHitsounds);
+                else if (timeWithoutHitsounds > warning_threshold_time && objectsWithoutHitsounds > warning_threshold_objects)
+                    yield return new IssueTemplateLongPeriodWarning(this).Create(lastHitsoundTime, timeWithoutHitsounds);
+                else if (timeWithoutHitsounds > negligible_threshold_time && objectsWithoutHitsounds > warning_threshold_objects)
+                    yield return new IssueTemplateLongPeriodNegligible(this).Create(lastHitsoundTime, timeWithoutHitsounds);
+            }
+
+            if (hasHitsound)
+            {
+                mapHasHitsounds = true;
+                objectsWithoutHitsounds = 0;
+                lastHitsoundTime = time;
+            }
+            else if (couldHaveHitsound)
+                ++objectsWithoutHitsounds;
+        }
+
+        private bool isHitsound(HitSampleInfo sample) => HitSampleInfo.AllAdditions.Any(sample.Name.Contains);
+        private bool isHitnormal(HitSampleInfo sample) => sample.Name.Contains(HitSampleInfo.HIT_NORMAL);
+
+        public abstract class IssueTemplateLongPeriod : IssueTemplate
+        {
+            protected IssueTemplateLongPeriod(ICheck check, IssueType type)
+                : base(check, type, "Long period without hitsounds ({0:F1} seconds).")
+            {
+            }
+
+            public Issue Create(double time, double duration) => new Issue(this, duration / 1000f) { Time = time };
+        }
+
+        public class IssueTemplateLongPeriodProblem : IssueTemplateLongPeriod
+        {
+            public IssueTemplateLongPeriodProblem(ICheck check)
+                : base(check, IssueType.Problem)
+            {
+            }
+        }
+
+        public class IssueTemplateLongPeriodWarning : IssueTemplateLongPeriod
+        {
+            public IssueTemplateLongPeriodWarning(ICheck check)
+                : base(check, IssueType.Warning)
+            {
+            }
+        }
+
+        public class IssueTemplateLongPeriodNegligible : IssueTemplateLongPeriod
+        {
+            public IssueTemplateLongPeriodNegligible(ICheck check)
+                : base(check, IssueType.Negligible)
+            {
+            }
+        }
+
+        public class IssueTemplateNoHitsounds : IssueTemplate
+        {
+            public IssueTemplateNoHitsounds(ICheck check)
+                : base(check, IssueType.Problem, "There are no hitsounds.")
+            {
+            }
+
+            public Issue Create() => new Issue(this);
+        }
+    }
+}

osu.Game/Rulesets/Edit/Checks/CheckMutedObjects.cs

@@ -0,0 +1,158 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using osu.Framework.Utils;
+using osu.Game.Rulesets.Edit.Checks.Components;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+
+namespace osu.Game.Rulesets.Edit.Checks
+{
+    public class CheckMutedObjects : ICheck
+    {
+        /// <summary>
+        /// Volume percentages lower than or equal to this are typically inaudible.
+        /// </summary>
+        private const int muted_threshold = 5;
+
+        /// <summary>
+        /// Volume percentages lower than or equal to this can sometimes be inaudible depending on sample used and music volume.
+        /// </summary>
+        private const int low_volume_threshold = 20;
+
+        private enum EdgeType
+        {
+            Head,
+            Repeat,
+            Tail,
+            None
+        }
+
+        public CheckMetadata Metadata { get; } = new CheckMetadata(CheckCategory.Audio, "Low volume hitobjects");
+
+        public IEnumerable<IssueTemplate> PossibleTemplates => new IssueTemplate[]
+        {
+            new IssueTemplateMutedActive(this),
+            new IssueTemplateLowVolumeActive(this),
+            new IssueTemplateMutedPassive(this)
+        };
+
+        public IEnumerable<Issue> Run(BeatmapVerifierContext context)
+        {
+            foreach (var hitObject in context.Beatmap.HitObjects)
+            {
+                // Worth keeping in mind: The samples of an object always play at its end time.
+                // Objects like spinners have no sound at its start because of this, while hold notes have nested objects to accomplish this.
+                foreach (var nestedHitObject in hitObject.NestedHitObjects)
+                {
+                    foreach (var issue in getVolumeIssues(hitObject, nestedHitObject))
+                        yield return issue;
+                }
+
+                foreach (var issue in getVolumeIssues(hitObject))
+                    yield return issue;
+            }
+        }
+
+        private IEnumerable<Issue> getVolumeIssues(HitObject hitObject, HitObject sampledHitObject = null)
+        {
+            sampledHitObject ??= hitObject;
+            if (!sampledHitObject.Samples.Any())
+                yield break;
+
+            // Samples that allow themselves to be overridden by control points have a volume of 0.
+            int maxVolume = sampledHitObject.Samples.Max(sample => sample.Volume > 0 ? sample.Volume : sampledHitObject.SampleControlPoint.SampleVolume);
+            double samplePlayTime = sampledHitObject.GetEndTime();
+
+            EdgeType edgeType = getEdgeAtTime(hitObject, samplePlayTime);
+            // We only care about samples played on the edges of objects, not ones like spinnerspin or slidertick.
+            if (edgeType == EdgeType.None)
+                yield break;
+
+            string postfix = hitObject is IHasDuration ? edgeType.ToString().ToLower() : null;
+
+            if (maxVolume <= muted_threshold)
+            {
+                if (edgeType == EdgeType.Head)
+                    yield return new IssueTemplateMutedActive(this).Create(hitObject, maxVolume / 100f, sampledHitObject.GetEndTime(), postfix);
+                else
+                    yield return new IssueTemplateMutedPassive(this).Create(hitObject, maxVolume / 100f, sampledHitObject.GetEndTime(), postfix);
+            }
+            else if (maxVolume <= low_volume_threshold && edgeType == EdgeType.Head)
+            {
+                yield return new IssueTemplateLowVolumeActive(this).Create(hitObject, maxVolume / 100f, sampledHitObject.GetEndTime(), postfix);
+            }
+        }
+
+        private EdgeType getEdgeAtTime(HitObject hitObject, double time)
+        {
+            if (Precision.AlmostEquals(time, hitObject.StartTime, 1f))
+                return EdgeType.Head;
+            if (Precision.AlmostEquals(time, hitObject.GetEndTime(), 1f))
+                return EdgeType.Tail;
+
+            if (hitObject is IHasRepeats hasRepeats)
+            {
+                double spanDuration = hasRepeats.Duration / hasRepeats.SpanCount();
+                if (spanDuration <= 0)
+                    // Prevents undefined behaviour in cases like where zero/negative-length sliders/hold notes exist.
+                    return EdgeType.None;
+
+                double spans = (time - hitObject.StartTime) / spanDuration;
+                double acceptableDifference = 1 / spanDuration; // 1 ms of acceptable difference, as with head/tail above.
+
+                if (Precision.AlmostEquals(spans, Math.Ceiling(spans), acceptableDifference) ||
+                    Precision.AlmostEquals(spans, Math.Floor(spans), acceptableDifference))
+                {
+                    return EdgeType.Repeat;
+                }
+            }
+
+            return EdgeType.None;
+        }
+
+        public abstract class IssueTemplateMuted : IssueTemplate
+        {
+            protected IssueTemplateMuted(ICheck check, IssueType type, string unformattedMessage)
+                : base(check, type, unformattedMessage)
+            {
+            }
+
+            public Issue Create(HitObject hitobject, double volume, double time, string postfix = "")
+            {
+                string objectName = hitobject.GetType().Name;
+                if (!string.IsNullOrEmpty(postfix))
+                    objectName += " " + postfix;
+
+                return new Issue(hitobject, this, objectName, volume) { Time = time };
+            }
+        }
+
+        public class IssueTemplateMutedActive : IssueTemplateMuted
+        {
+            public IssueTemplateMutedActive(ICheck check)
+                : base(check, IssueType.Problem, "{0} has a volume of {1:0%}. Clickable objects must have clearly audible feedback.")
+            {
+            }
+        }
+
+        public class IssueTemplateLowVolumeActive : IssueTemplateMuted
+        {
+            public IssueTemplateLowVolumeActive(ICheck check)
+                : base(check, IssueType.Warning, "{0} has a volume of {1:0%}, ensure this is audible.")
+            {
+            }
+        }
+
+        public class IssueTemplateMutedPassive : IssueTemplateMuted
+        {
+            public IssueTemplateMutedPassive(ICheck check)
+                : base(check, IssueType.Negligible, "{0} has a volume of {1:0%}, ensure there is no distinct sound here in the song if inaudible.")
+            {
+            }
+        }
+    }
+}