Merge branch 'master' into catch-combo-counter

global.json

@@ -5,6 +5,6 @@
     "version": "3.1.100"
   },
   "msbuild-sdks": {
-    "Microsoft.Build.Traversal": "2.0.52"
+    "Microsoft.Build.Traversal": "2.1.1"
   }
 }

osu.Android.props

@@ -51,7 +51,7 @@
     <Reference Include="Java.Interop" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Game.Resources" Version="2020.812.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2020.819.0" />
+    <PackageReference Include="ppy.osu.Game.Resources" Version="2020.904.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2020.911.0" />
   </ItemGroup>
 </Project>

osu.Game.Rulesets.Catch.Tests/CatchBeatmapConversionTest.cs

@@ -14,6 +14,7 @@ using osu.Game.Tests.Beatmaps;
 namespace osu.Game.Rulesets.Catch.Tests
 {
     [TestFixture]
+    [Timeout(10000)]
     public class CatchBeatmapConversionTest : BeatmapConversionTest<ConvertValue>
     {
         protected override string ResourceAssembly => "osu.Game.Rulesets.Catch";

osu.Game.Rulesets.Catch.Tests/osu.Game.Rulesets.Catch.Tests.csproj

@@ -2,7 +2,7 @@
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />

osu.Game.Rulesets.Catch/Beatmaps/CatchBeatmap.cs

@@ -3,7 +3,6 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using osu.Framework.Graphics.Sprites;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
 
@@ -23,19 +22,19 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
                 {
                     Name = @"Fruit Count",
                     Content = fruits.ToString(),
-                    Icon = FontAwesome.Regular.Circle
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles),
                 },
                 new BeatmapStatistic
                 {
                     Name = @"Juice Stream Count",
                     Content = juiceStreams.ToString(),
-                    Icon = FontAwesome.Regular.Circle
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders),
                 },
                 new BeatmapStatistic
                 {
                     Name = @"Banana Shower Count",
                     Content = bananaShowers.ToString(),
-                    Icon = FontAwesome.Regular.Circle
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Spinners),
                 }
             };
         }

osu.Game.Rulesets.Catch/CatchRuleset.cs

@@ -21,13 +21,11 @@ using osu.Game.Rulesets.Difficulty;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
 using System;
-using osu.Framework.Testing;
 using osu.Game.Rulesets.Catch.Skinning;
 using osu.Game.Skinning;
 
 namespace osu.Game.Rulesets.Catch
 {
-    [ExcludeFromDynamicCompile]
     public class CatchRuleset : Ruleset, ILegacyRuleset
     {
         public override DrawableRuleset CreateDrawableRulesetWith(IBeatmap beatmap, IReadOnlyList<Mod> mods = null) => new DrawableCatchRuleset(this, beatmap, mods);

osu.Game.Rulesets.Catch/Difficulty/CatchDifficultyAttributes.cs

@@ -8,6 +8,5 @@ namespace osu.Game.Rulesets.Catch.Difficulty
     public class CatchDifficultyAttributes : DifficultyAttributes
     {
         public double ApproachRate;
-        public int MaxCombo;
     }
 }

osu.Game.Rulesets.Mania.Tests/ManiaBeatmapConversionTest.cs

@@ -14,11 +14,13 @@ using osu.Game.Tests.Beatmaps;
 namespace osu.Game.Rulesets.Mania.Tests
 {
     [TestFixture]
+    [Timeout(10000)]
     public class ManiaBeatmapConversionTest : BeatmapConversionTest<ManiaConvertMapping, ConvertValue>
     {
         protected override string ResourceAssembly => "osu.Game.Rulesets.Mania";
 
         [TestCase("basic")]
+        [TestCase("zero-length-slider")]
         public void Test(string name) => base.Test(name);
 
         protected override IEnumerable<ConvertValue> CreateConvertValue(HitObject hitObject)

osu.Game.Rulesets.Mania.Tests/osu.Game.Rulesets.Mania.Tests.csproj

@@ -2,7 +2,7 @@
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />

osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmap.cs

@@ -3,7 +3,6 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using osu.Framework.Graphics.Sprites;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.UI;
@@ -41,14 +40,14 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
                 new BeatmapStatistic
                 {
                     Name = @"Note Count",
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles),
                     Content = notes.ToString(),
-                    Icon = FontAwesome.Regular.Circle
                 },
                 new BeatmapStatistic
                 {
                     Name = @"Hold Note Count",
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders),
                     Content = holdnotes.ToString(),
-                    Icon = FontAwesome.Regular.Circle
                 },
             };
         }

osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs

@@ -5,7 +5,6 @@ using osu.Game.Rulesets.Mania.Objects;
 using System;
 using System.Linq;
 using System.Collections.Generic;
-using osu.Framework.Utils;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Objects;
@@ -167,8 +166,10 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
 
                     var positionData = original as IHasPosition;
 
-                    for (double time = original.StartTime; !Precision.DefinitelyBigger(time, generator.EndTime); time += generator.SegmentDuration)
+                    for (int i = 0; i <= generator.SpanCount; i++)
                     {
+                        double time = original.StartTime + generator.SegmentDuration * i;
+
                         recordNote(time, positionData?.Position ?? Vector2.Zero);
                         computeDensity(time);
                     }

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/DistanceObjectPatternGenerator.cs

@@ -27,8 +27,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
         public readonly double EndTime;
         public readonly double SegmentDuration;
-
-        private readonly int spanCount;
+        public readonly int SpanCount;
 
         private PatternType convertType;
 
@@ -42,20 +41,20 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             var distanceData = hitObject as IHasDistance;
             var repeatsData = hitObject as IHasRepeats;
 
-            spanCount = repeatsData?.SpanCount() ?? 1;
+            SpanCount = repeatsData?.SpanCount() ?? 1;
 
             TimingControlPoint timingPoint = beatmap.ControlPointInfo.TimingPointAt(hitObject.StartTime);
             DifficultyControlPoint difficultyPoint = beatmap.ControlPointInfo.DifficultyPointAt(hitObject.StartTime);
 
             // The true distance, accounting for any repeats
-            double distance = (distanceData?.Distance ?? 0) * spanCount;
+            double distance = (distanceData?.Distance ?? 0) * SpanCount;
             // The velocity of the osu! hit object - calculated as the velocity of a slider
             double osuVelocity = osu_base_scoring_distance * beatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier * difficultyPoint.SpeedMultiplier / timingPoint.BeatLength;
             // The duration of the osu! hit object
             double osuDuration = distance / osuVelocity;
 
             EndTime = hitObject.StartTime + osuDuration;
-            SegmentDuration = (EndTime - HitObject.StartTime) / spanCount;
+            SegmentDuration = (EndTime - HitObject.StartTime) / SpanCount;
         }
 
         public override IEnumerable<Pattern> Generate()
@@ -96,7 +95,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 return pattern;
             }
 
-            if (spanCount > 1)
+            if (SpanCount > 1)
             {
                 if (SegmentDuration <= 90)
                     return generateRandomHoldNotes(HitObject.StartTime, 1);
@@ -104,7 +103,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 if (SegmentDuration <= 120)
                 {
                     convertType |= PatternType.ForceNotStack;
-                    return generateRandomNotes(HitObject.StartTime, spanCount + 1);
+                    return generateRandomNotes(HitObject.StartTime, SpanCount + 1);
                 }
 
                 if (SegmentDuration <= 160)
@@ -117,7 +116,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 if (duration >= 4000)
                     return generateNRandomNotes(HitObject.StartTime, 0.23, 0, 0);
 
-                if (SegmentDuration > 400 && spanCount < TotalColumns - 1 - RandomStart)
+                if (SegmentDuration > 400 && SpanCount < TotalColumns - 1 - RandomStart)
                     return generateTiledHoldNotes(HitObject.StartTime);
 
                 return generateHoldAndNormalNotes(HitObject.StartTime);
@@ -251,7 +250,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             int column = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             bool increasing = Random.NextDouble() > 0.5;
 
-            for (int i = 0; i <= spanCount; i++)
+            for (int i = 0; i <= SpanCount; i++)
             {
                 addToPattern(pattern, column, startTime, startTime);
                 startTime += SegmentDuration;
@@ -302,7 +301,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
 
-            for (int i = 0; i <= spanCount; i++)
+            for (int i = 0; i <= SpanCount; i++)
             {
                 addToPattern(pattern, nextColumn, startTime, startTime);
 
@@ -393,7 +392,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             var pattern = new Pattern();
 
-            int columnRepeat = Math.Min(spanCount, TotalColumns);
+            int columnRepeat = Math.Min(SpanCount, TotalColumns);
 
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
@@ -447,7 +446,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             var rowPattern = new Pattern();
 
-            for (int i = 0; i <= spanCount; i++)
+            for (int i = 0; i <= SpanCount; i++)
             {
                 if (!(ignoreHead && startTime == HitObject.StartTime))
                 {

osu.Game.Rulesets.Mania/Configuration/ManiaRulesetConfigManager.cs

@@ -20,7 +20,7 @@ namespace osu.Game.Rulesets.Mania.Configuration
         {
             base.InitialiseDefaults();
 
-            Set(ManiaRulesetSetting.ScrollTime, 1500.0, DrawableManiaRuleset.MIN_TIME_RANGE, DrawableManiaRuleset.MAX_TIME_RANGE, 1);
+            Set(ManiaRulesetSetting.ScrollTime, 1500.0, DrawableManiaRuleset.MIN_TIME_RANGE, DrawableManiaRuleset.MAX_TIME_RANGE, 5);
             Set(ManiaRulesetSetting.ScrollDirection, ManiaScrollingDirection.Down);
         }
 

osu.Game.Rulesets.Mania/Difficulty/ManiaDifficultyCalculator.cs

@@ -11,6 +11,7 @@ using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Difficulty.Preprocessing;
 using osu.Game.Rulesets.Mania.Difficulty.Skills;
 using osu.Game.Rulesets.Mania.Mods;
+using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Scoring;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Scoring;
@@ -43,6 +44,7 @@ namespace osu.Game.Rulesets.Mania.Difficulty
                 Mods = mods,
                 // Todo: This int cast is temporary to achieve 1:1 results with osu!stable, and should be removed in the future
                 GreatHitWindow = (int)(hitWindows.WindowFor(HitResult.Great)) / clockRate,
+                MaxCombo = beatmap.HitObjects.Sum(h => h is HoldNote ? 2 : 1),
                 Skills = skills
             };
         }

osu.Game.Rulesets.Mania/Edit/HoldNoteCompositionTool.cs

@@ -1,6 +1,8 @@
 // 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.Graphics;
+using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
 using osu.Game.Rulesets.Mania.Edit.Blueprints;
@@ -14,6 +16,8 @@ namespace osu.Game.Rulesets.Mania.Edit
         {
         }
 
+        public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders);
+
         public override PlacementBlueprint CreatePlacementBlueprint() => new HoldNotePlacementBlueprint();
     }
 }

osu.Game.Rulesets.Mania/Edit/NoteCompositionTool.cs

@@ -1,6 +1,8 @@
 // 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.Graphics;
+using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
 using osu.Game.Rulesets.Mania.Edit.Blueprints;
@@ -15,6 +17,8 @@ namespace osu.Game.Rulesets.Mania.Edit
         {
         }
 
+        public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles);
+
         public override PlacementBlueprint CreatePlacementBlueprint() => new NotePlacementBlueprint();
     }
 }

osu.Game.Rulesets.Mania/ManiaRuleset.cs

@@ -12,7 +12,6 @@ using System.Linq;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Input.Bindings;
-using osu.Framework.Testing;
 using osu.Game.Graphics;
 using osu.Game.Rulesets.Mania.Replays;
 using osu.Game.Rulesets.Replays.Types;
@@ -35,7 +34,6 @@ using osu.Game.Screens.Ranking.Statistics;
 
 namespace osu.Game.Rulesets.Mania
 {
-    [ExcludeFromDynamicCompile]
     public class ManiaRuleset : Ruleset, ILegacyRuleset
     {
         /// <summary>

osu.Game.Rulesets.Mania/ManiaSettingsSubsection.cs

@@ -34,7 +34,8 @@ namespace osu.Game.Rulesets.Mania
                 new SettingsSlider<double, TimeSlider>
                 {
                     LabelText = "Scroll speed",
-                    Bindable = config.GetBindable<double>(ManiaRulesetSetting.ScrollTime)
+                    Bindable = config.GetBindable<double>(ManiaRulesetSetting.ScrollTime),
+                    KeyboardStep = 5
                 },
             };
         }

osu.Game.Rulesets.Mania/Resources/Testing/Beatmaps/zero-length-slider-expected-conversion.json

@@ -0,0 +1,14 @@
+{
+    "Mappings": [{
+        "RandomW": 3083084786,
+        "RandomX": 273326509,
+        "RandomY": 273553282,
+        "RandomZ": 2659838971,
+        "StartTime": 4836,
+        "Objects": [{
+            "StartTime": 4836,
+            "EndTime": 4836,
+            "Column": 0
+        }]
+    }]
+}

osu.Game.Rulesets.Mania/Resources/Testing/Beatmaps/zero-length-slider.osu

@@ -0,0 +1,20 @@
+osu file format v14
+
+[General]
+StackLeniency: 0.7
+Mode: 0
+
+[Difficulty]
+HPDrainRate:1
+CircleSize:4
+OverallDifficulty:1
+ApproachRate:9
+SliderMultiplier:2.5
+SliderTickRate:0.5
+
+[TimingPoints]
+34,431.654676258993,4,1,0,50,1,0
+4782,-66.6666666666667,4,1,0,20,0,0
+
+[HitObjects]
+15,199,4836,22,0,L,1,46.8750017881394

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

@@ -12,6 +12,7 @@ using osu.Game.Tests.Beatmaps;
 namespace osu.Game.Rulesets.Osu.Tests
 {
     [TestFixture]
+    [Timeout(10000)]
     public class OsuBeatmapConversionTest : BeatmapConversionTest<ConvertValue>
     {
         protected override string ResourceAssembly => "osu.Game.Rulesets.Osu";

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

@@ -22,7 +22,6 @@ using osu.Game.Rulesets.Osu.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
 using osu.Game.Storyboards;
 using osuTK;
-using static osu.Game.Tests.Visual.OsuTestScene.ClockBackedTestWorkingBeatmap;
 
 namespace osu.Game.Rulesets.Osu.Tests
 {
@@ -32,8 +31,6 @@ namespace osu.Game.Rulesets.Osu.Tests
         [Resolved]
         private AudioManager audioManager { get; set; }
 
-        private TrackVirtualManual track;
-
         protected override bool Autoplay => autoplay;
         private bool autoplay;
 
@@ -44,11 +41,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         private const double fade_in_modifier = -1200;
 
         protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap, Storyboard storyboard = null)
-        {
-            var working = new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
-            track = (TrackVirtualManual)working.Track;
-            return working;
-        }
+            => new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
 
         [BackgroundDependencyLoader]
         private void load(RulesetConfigCache configCache)
@@ -72,7 +65,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             AddStep("enable autoplay", () => autoplay = true);
             base.SetUpSteps();
-            AddUntilStep("wait for track to start running", () => track.IsRunning);
+            AddUntilStep("wait for track to start running", () => Beatmap.Value.Track.IsRunning);
 
             double startTime = hitObjects[sliderIndex].StartTime;
             retrieveDrawableSlider(sliderIndex);
@@ -97,7 +90,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             AddStep("have autoplay", () => autoplay = true);
             base.SetUpSteps();
-            AddUntilStep("wait for track to start running", () => track.IsRunning);
+            AddUntilStep("wait for track to start running", () => Beatmap.Value.Track.IsRunning);
 
             double startTime = hitObjects[sliderIndex].StartTime;
             retrieveDrawableSlider(sliderIndex);
@@ -201,7 +194,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
         private void addSeekStep(double time)
         {
-            AddStep($"seek to {time}", () => track.Seek(time));
+            AddStep($"seek to {time}", () => MusicController.SeekTo(time));
 
             AddUntilStep("wait for seek to finish", () => Precision.AlmostEquals(time, Player.DrawableRuleset.FrameStableClock.CurrentTime, 100));
         }

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

@@ -25,7 +25,6 @@ using osu.Game.Scoring;
 using osu.Game.Storyboards;
 using osu.Game.Tests.Visual;
 using osuTK;
-using static osu.Game.Tests.Visual.OsuTestScene.ClockBackedTestWorkingBeatmap;
 
 namespace osu.Game.Rulesets.Osu.Tests
 {
@@ -34,18 +33,12 @@ namespace osu.Game.Rulesets.Osu.Tests
         [Resolved]
         private AudioManager audioManager { get; set; }
 
-        private TrackVirtualManual track;
-
         protected override bool Autoplay => true;
 
         protected override TestPlayer CreatePlayer(Ruleset ruleset) => new ScoreExposedPlayer();
 
         protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap, Storyboard storyboard = null)
-        {
-            var working = new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
-            track = (TrackVirtualManual)working.Track;
-            return working;
-        }
+            => new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
 
         private DrawableSpinner drawableSpinner;
         private SpriteIcon spinnerSymbol => drawableSpinner.ChildrenOfType<SpriteIcon>().Single();
@@ -55,7 +48,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             base.SetUpSteps();
 
-            AddUntilStep("wait for track to start running", () => track.IsRunning);
+            AddUntilStep("wait for track to start running", () => Beatmap.Value.Track.IsRunning);
             AddStep("retrieve spinner", () => drawableSpinner = (DrawableSpinner)Player.DrawableRuleset.Playfield.AllHitObjects.First());
         }
 
@@ -201,7 +194,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             addSeekStep(0);
 
-            AddStep("adjust track rate", () => track.AddAdjustment(AdjustableProperty.Tempo, new BindableDouble(rate)));
+            AddStep("adjust track rate", () => MusicController.CurrentTrack.AddAdjustment(AdjustableProperty.Tempo, new BindableDouble(rate)));
             // autoplay replay frames use track time;
             // if a spin takes 1000ms in track time and we're playing with a 2x rate adjustment, the spin will take 500ms of *real* time.
             // therefore we need to apply the rate adjustment to the replay itself to change from track time to real time,
@@ -230,7 +223,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
         private void addSeekStep(double time)
         {
-            AddStep($"seek to {time}", () => track.Seek(time));
+            AddStep($"seek to {time}", () => MusicController.SeekTo(time));
 
             AddUntilStep("wait for seek to finish", () => Precision.AlmostEquals(time, Player.DrawableRuleset.FrameStableClock.CurrentTime, 100));
         }

osu.Game.Rulesets.Osu.Tests/osu.Game.Rulesets.Osu.Tests.csproj

@@ -2,7 +2,7 @@
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />

osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmap.cs

@@ -3,7 +3,6 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using osu.Framework.Graphics.Sprites;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Osu.Objects;
 
@@ -23,19 +22,19 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
                 {
                     Name = @"Circle Count",
                     Content = circles.ToString(),
-                    Icon = FontAwesome.Regular.Circle
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles),
                 },
                 new BeatmapStatistic
                 {
                     Name = @"Slider Count",
                     Content = sliders.ToString(),
-                    Icon = FontAwesome.Regular.Circle
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders),
                 },
                 new BeatmapStatistic
                 {
                     Name = @"Spinner Count",
                     Content = spinners.ToString(),
-                    Icon = FontAwesome.Regular.Circle
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Spinners),
                 }
             };
         }

osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyAttributes.cs

@@ -11,6 +11,5 @@ namespace osu.Game.Rulesets.Osu.Difficulty
         public double SpeedStrain;
         public double ApproachRate;
         public double OverallDifficulty;
-        public int MaxCombo;
     }
 }

osu.Game.Rulesets.Osu/Edit/HitCircleCompositionTool.cs

@@ -1,6 +1,8 @@
 // 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.Graphics;
+using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles;
@@ -15,6 +17,8 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
         }
 
+        public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles);
+
         public override PlacementBlueprint CreatePlacementBlueprint() => new HitCirclePlacementBlueprint();
     }
 }

osu.Game.Rulesets.Osu/Edit/OsuHitObjectComposer.cs

@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Allocation;
+using osu.Framework.Bindables;
 using osu.Framework.Caching;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -38,6 +39,13 @@ namespace osu.Game.Rulesets.Osu.Edit
             new SpinnerCompositionTool()
         };
 
+        private readonly BindableBool distanceSnapToggle = new BindableBool(true) { Description = "Distance Snap" };
+
+        protected override IEnumerable<BindableBool> Toggles => new[]
+        {
+            distanceSnapToggle
+        };
+
         [BackgroundDependencyLoader]
         private void load()
         {
@@ -45,6 +53,7 @@ namespace osu.Game.Rulesets.Osu.Edit
 
             EditorBeatmap.SelectedHitObjects.CollectionChanged += (_, __) => updateDistanceSnapGrid();
             EditorBeatmap.PlacementObject.ValueChanged += _ => updateDistanceSnapGrid();
+            distanceSnapToggle.ValueChanged += _ => updateDistanceSnapGrid();
         }
 
         protected override ComposeBlueprintContainer CreateBlueprintContainer(IEnumerable<DrawableHitObject> hitObjects)
@@ -87,6 +96,10 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
             distanceSnapGridContainer.Clear();
             distanceSnapGridCache.Invalidate();
+            distanceSnapGrid = null;
+
+            if (!distanceSnapToggle.Value)
+                return;
 
             switch (BlueprintContainer.CurrentTool)
             {

osu.Game.Rulesets.Osu/Edit/SliderCompositionTool.cs

@@ -1,6 +1,8 @@
 // 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.Graphics;
+using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders;
@@ -15,6 +17,8 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
         }
 
+        public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders);
+
         public override PlacementBlueprint CreatePlacementBlueprint() => new SliderPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Osu/Edit/SpinnerCompositionTool.cs

@@ -1,6 +1,8 @@
 // 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.Graphics;
+using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners;
@@ -15,6 +17,8 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
         }
 
+        public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Spinners);
+
         public override PlacementBlueprint CreatePlacementBlueprint() => new SpinnerPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Osu/Objects/Slider.cs

@@ -7,6 +7,7 @@ using System.Collections.Generic;
 using osu.Game.Rulesets.Objects;
 using System.Linq;
 using System.Threading;
+using Newtonsoft.Json;
 using osu.Framework.Caching;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
@@ -21,6 +22,7 @@ namespace osu.Game.Rulesets.Osu.Objects
     {
         public double EndTime => StartTime + this.SpanCount() * Path.Distance / Velocity;
 
+        [JsonIgnore]
         public double Duration
         {
             get => EndTime - StartTime;
@@ -112,8 +114,11 @@ namespace osu.Game.Rulesets.Osu.Objects
         /// </summary>
         public double TickDistanceMultiplier = 1;
 
-        public HitCircle HeadCircle;
-        public SliderTailCircle TailCircle;
+        [JsonIgnore]
+        public HitCircle HeadCircle { get; protected set; }
+
+        [JsonIgnore]
+        public SliderTailCircle TailCircle { get; protected set; }
 
         public Slider()
         {

osu.Game.Rulesets.Osu/OsuRuleset.cs

@@ -30,14 +30,12 @@ using osu.Game.Scoring;
 using osu.Game.Skinning;
 using System;
 using System.Linq;
-using osu.Framework.Testing;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Statistics;
 using osu.Game.Screens.Ranking.Statistics;
 
 namespace osu.Game.Rulesets.Osu
 {
-    [ExcludeFromDynamicCompile]
     public class OsuRuleset : Ruleset, ILegacyRuleset
     {
         public override DrawableRuleset CreateDrawableRulesetWith(IBeatmap beatmap, IReadOnlyList<Mod> mods = null) => new DrawableOsuRuleset(this, beatmap, mods);

osu.Game.Rulesets.Osu/Skinning/LegacySliderBody.cs

@@ -18,6 +18,10 @@ namespace osu.Game.Rulesets.Osu.Skinning
         {
             private const float shadow_portion = 1 - (OsuLegacySkinTransformer.LEGACY_CIRCLE_RADIUS / OsuHitObject.OBJECT_RADIUS);
 
+            protected new float CalculatedBorderPortion
+                // Roughly matches osu!stable's slider border portions.
+                => base.CalculatedBorderPortion * 0.77f;
+
             public new Color4 AccentColour => new Color4(base.AccentColour.R, base.AccentColour.G, base.AccentColour.B, base.AccentColour.A * 0.70f);
 
             protected override Color4 ColourAt(float position)

osu.Game.Rulesets.Osu/Statistics/AccuracyHeatmap.cs

@@ -192,7 +192,7 @@ namespace osu.Game.Rulesets.Osu.Statistics
 
         protected void AddPoint(Vector2 start, Vector2 end, Vector2 hitPoint, float radius)
         {
-            if (pointGrid.Content.Length == 0)
+            if (pointGrid.Content.Count == 0)
                 return;
 
             double angle1 = Math.Atan2(end.Y - hitPoint.Y, hitPoint.X - end.X); // Angle between the end point and the hit point.

osu.Game.Rulesets.Taiko.Tests/TaikoBeatmapConversionTest.cs

@@ -12,6 +12,7 @@ using osu.Game.Tests.Beatmaps;
 namespace osu.Game.Rulesets.Taiko.Tests
 {
     [TestFixture]
+    [Timeout(10000)]
     public class TaikoBeatmapConversionTest : BeatmapConversionTest<ConvertValue>
     {
         protected override string ResourceAssembly => "osu.Game.Rulesets.Taiko";

osu.Game.Rulesets.Taiko.Tests/TaikoDifficultyCalculatorTest.cs

@@ -13,8 +13,8 @@ namespace osu.Game.Rulesets.Taiko.Tests
     {
         protected override string ResourceAssembly => "osu.Game.Rulesets.Taiko";
 
-        [TestCase(2.9811338051242915d, "diffcalc-test")]
-        [TestCase(2.9811338051242915d, "diffcalc-test-strong")]
+        [TestCase(2.2867022617692685d, "diffcalc-test")]
+        [TestCase(2.2867022617692685d, "diffcalc-test-strong")]
         public void Test(double expected, string name)
             => base.Test(expected, name);
 

osu.Game.Rulesets.Taiko.Tests/osu.Game.Rulesets.Taiko.Tests.csproj

@@ -2,7 +2,7 @@
   <Import Project="..\osu.TestProject.props" />
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />

osu.Game.Rulesets.Taiko/Beatmaps/TaikoBeatmap.cs

@@ -3,7 +3,6 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using osu.Framework.Graphics.Sprites;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Taiko.Objects;
 
@@ -22,20 +21,20 @@ namespace osu.Game.Rulesets.Taiko.Beatmaps
                 new BeatmapStatistic
                 {
                     Name = @"Hit Count",
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles),
                     Content = hits.ToString(),
-                    Icon = FontAwesome.Regular.Circle
                 },
                 new BeatmapStatistic
                 {
                     Name = @"Drumroll Count",
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders),
                     Content = drumrolls.ToString(),
-                    Icon = FontAwesome.Regular.Circle
                 },
                 new BeatmapStatistic
                 {
                     Name = @"Swell Count",
+                    CreateIcon = () => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Spinners),
                     Content = swells.ToString(),
-                    Icon = FontAwesome.Regular.Circle
                 }
             };
         }

osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/StaminaCheeseDetector.cs

@@ -0,0 +1,140 @@
+// 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 osu.Game.Rulesets.Difficulty.Utils;
+using osu.Game.Rulesets.Taiko.Objects;
+
+namespace osu.Game.Rulesets.Taiko.Difficulty.Preprocessing
+{
+    /// <summary>
+    /// Detects special hit object patterns which are easier to hit using special techniques
+    /// than normally assumed in the fully-alternating play style.
+    /// </summary>
+    /// <remarks>
+    /// This component detects two basic types of patterns, leveraged by the following techniques:
+    /// <list>
+    /// <item>Rolling allows hitting patterns with quickly and regularly alternating notes with a single hand.</item>
+    /// <item>TL tapping makes hitting longer sequences of consecutive same-colour notes with little to no colour changes in-between.</item>
+    /// </list>
+    /// </remarks>
+    public class StaminaCheeseDetector
+    {
+        /// <summary>
+        /// The minimum number of consecutive objects with repeating patterns that can be classified as hittable using a roll.
+        /// </summary>
+        private const int roll_min_repetitions = 12;
+
+        /// <summary>
+        /// The minimum number of consecutive objects with repeating patterns that can be classified as hittable using a TL tap.
+        /// </summary>
+        private const int tl_min_repetitions = 16;
+
+        /// <summary>
+        /// The list of all <see cref="TaikoDifficultyHitObject"/>s in the map.
+        /// </summary>
+        private readonly List<TaikoDifficultyHitObject> hitObjects;
+
+        public StaminaCheeseDetector(List<TaikoDifficultyHitObject> hitObjects)
+        {
+            this.hitObjects = hitObjects;
+        }
+
+        /// <summary>
+        /// Finds and marks all objects in <see cref="hitObjects"/> that special difficulty-reducing techiques apply to
+        /// with the <see cref="TaikoDifficultyHitObject.StaminaCheese"/> flag.
+        /// </summary>
+        public void FindCheese()
+        {
+            findRolls(3);
+            findRolls(4);
+
+            findTlTap(0, HitType.Rim);
+            findTlTap(1, HitType.Rim);
+            findTlTap(0, HitType.Centre);
+            findTlTap(1, HitType.Centre);
+        }
+
+        /// <summary>
+        /// Finds and marks all sequences hittable using a roll.
+        /// </summary>
+        /// <param name="patternLength">The length of a single repeating pattern to consider (triplets/quadruplets).</param>
+        private void findRolls(int patternLength)
+        {
+            var history = new LimitedCapacityQueue<TaikoDifficultyHitObject>(2 * patternLength);
+
+            // for convenience, we're tracking the index of the item *before* our suspected repeat's start,
+            // as that index can be simply subtracted from the current index to get the number of elements in between
+            // without off-by-one errors
+            int indexBeforeLastRepeat = -1;
+
+            for (int i = 0; i < hitObjects.Count; i++)
+            {
+                history.Enqueue(hitObjects[i]);
+                if (!history.Full)
+                    continue;
+
+                if (!containsPatternRepeat(history, patternLength))
+                {
+                    // we're setting this up for the next iteration, hence the +1.
+                    // right here this index will point at the queue's front (oldest item),
+                    // but that item is about to be popped next loop with an enqueue.
+                    indexBeforeLastRepeat = i - history.Count + 1;
+                    continue;
+                }
+
+                int repeatedLength = i - indexBeforeLastRepeat;
+                if (repeatedLength < roll_min_repetitions)
+                    continue;
+
+                markObjectsAsCheese(i, repeatedLength);
+            }
+        }
+
+        /// <summary>
+        /// Determines whether the objects stored in <paramref name="history"/> contain a repetition of a pattern of length <paramref name="patternLength"/>.
+        /// </summary>
+        private static bool containsPatternRepeat(LimitedCapacityQueue<TaikoDifficultyHitObject> history, int patternLength)
+        {
+            for (int j = 0; j < patternLength; j++)
+            {
+                if (history[j].HitType != history[j + patternLength].HitType)
+                    return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Finds and marks all sequences hittable using a TL tap.
+        /// </summary>
+        /// <param name="parity">Whether sequences starting with an odd- (1) or even-indexed (0) hit object should be checked.</param>
+        /// <param name="type">The type of hit to check for TL taps.</param>
+        private void findTlTap(int parity, HitType type)
+        {
+            int tlLength = -2;
+
+            for (int i = parity; i < hitObjects.Count; i += 2)
+            {
+                if (hitObjects[i].HitType == type)
+                    tlLength += 2;
+                else
+                    tlLength = -2;
+
+                if (tlLength < tl_min_repetitions)
+                    continue;
+
+                markObjectsAsCheese(i, tlLength);
+            }
+        }
+
+        /// <summary>
+        /// Marks <paramref name="count"/> elements counting backwards from <paramref name="end"/> as <see cref="TaikoDifficultyHitObject.StaminaCheese"/>.
+        /// </summary>
+        private void markObjectsAsCheese(int end, int count)
+        {
+            for (int i = 0; i < count; ++i)
+                hitObjects[end - i].StaminaCheese = true;
+        }
+    }
+}

osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/TaikoDifficultyHitObject.cs

@@ -1,20 +1,94 @@
 // 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.Linq;
 using osu.Game.Rulesets.Difficulty.Preprocessing;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Taiko.Objects;
 
 namespace osu.Game.Rulesets.Taiko.Difficulty.Preprocessing
 {
+    /// <summary>
+    /// Represents a single hit object in taiko difficulty calculation.
+    /// </summary>
     public class TaikoDifficultyHitObject : DifficultyHitObject
     {
-        public readonly bool HasTypeChange;
+        /// <summary>
+        /// The rhythm required to hit this hit object.
+        /// </summary>
+        public readonly TaikoDifficultyHitObjectRhythm Rhythm;
 
-        public TaikoDifficultyHitObject(HitObject hitObject, HitObject lastObject, double clockRate)
+        /// <summary>
+        /// The hit type of this hit object.
+        /// </summary>
+        public readonly HitType? HitType;
+
+        /// <summary>
+        /// The index of the object in the beatmap.
+        /// </summary>
+        public readonly int ObjectIndex;
+
+        /// <summary>
+        /// Whether the object should carry a penalty due to being hittable using special techniques
+        /// making it easier to do so.
+        /// </summary>
+        public bool StaminaCheese;
+
+        /// <summary>
+        /// Creates a new difficulty hit object.
+        /// </summary>
+        /// <param name="hitObject">The gameplay <see cref="HitObject"/> associated with this difficulty object.</param>
+        /// <param name="lastObject">The gameplay <see cref="HitObject"/> preceding <paramref name="hitObject"/>.</param>
+        /// <param name="lastLastObject">The gameplay <see cref="HitObject"/> preceding <paramref name="lastObject"/>.</param>
+        /// <param name="clockRate">The rate of the gameplay clock. Modified by speed-changing mods.</param>
+        /// <param name="objectIndex">The index of the object in the beatmap.</param>
+        public TaikoDifficultyHitObject(HitObject hitObject, HitObject lastObject, HitObject lastLastObject, double clockRate, int objectIndex)
             : base(hitObject, lastObject, clockRate)
         {
-            HasTypeChange = (lastObject as Hit)?.Type != (hitObject as Hit)?.Type;
+            var currentHit = hitObject as Hit;
+
+            Rhythm = getClosestRhythm(lastObject, lastLastObject, clockRate);
+            HitType = currentHit?.Type;
+
+            ObjectIndex = objectIndex;
+        }
+
+        /// <summary>
+        /// List of most common rhythm changes in taiko maps.
+        /// </summary>
+        /// <remarks>
+        /// The general guidelines for the values are:
+        /// <list type="bullet">
+        /// <item>rhythm changes with ratio closer to 1 (that are <i>not</i> 1) are harder to play,</item>
+        /// <item>speeding up is <i>generally</i> harder than slowing down (with exceptions of rhythm changes requiring a hand switch).</item>
+        /// </list>
+        /// </remarks>
+        private static readonly TaikoDifficultyHitObjectRhythm[] common_rhythms =
+        {
+            new TaikoDifficultyHitObjectRhythm(1, 1, 0.0),
+            new TaikoDifficultyHitObjectRhythm(2, 1, 0.3),
+            new TaikoDifficultyHitObjectRhythm(1, 2, 0.5),
+            new TaikoDifficultyHitObjectRhythm(3, 1, 0.3),
+            new TaikoDifficultyHitObjectRhythm(1, 3, 0.35),
+            new TaikoDifficultyHitObjectRhythm(3, 2, 0.6), // purposefully higher (requires hand switch in full alternating gameplay style)
+            new TaikoDifficultyHitObjectRhythm(2, 3, 0.4),
+            new TaikoDifficultyHitObjectRhythm(5, 4, 0.5),
+            new TaikoDifficultyHitObjectRhythm(4, 5, 0.7)
+        };
+
+        /// <summary>
+        /// Returns the closest rhythm change from <see cref="common_rhythms"/> required to hit this object.
+        /// </summary>
+        /// <param name="lastObject">The gameplay <see cref="HitObject"/> preceding this one.</param>
+        /// <param name="lastLastObject">The gameplay <see cref="HitObject"/> preceding <paramref name="lastObject"/>.</param>
+        /// <param name="clockRate">The rate of the gameplay clock.</param>
+        private TaikoDifficultyHitObjectRhythm getClosestRhythm(HitObject lastObject, HitObject lastLastObject, double clockRate)
+        {
+            double prevLength = (lastObject.StartTime - lastLastObject.StartTime) / clockRate;
+            double ratio = DeltaTime / prevLength;
+
+            return common_rhythms.OrderBy(x => Math.Abs(x.Ratio - ratio)).First();
         }
     }
 }

osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/TaikoDifficultyHitObjectRhythm.cs

@@ -0,0 +1,35 @@
+// 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.
+
+namespace osu.Game.Rulesets.Taiko.Difficulty.Preprocessing
+{
+    /// <summary>
+    /// Represents a rhythm change in a taiko map.
+    /// </summary>
+    public class TaikoDifficultyHitObjectRhythm
+    {
+        /// <summary>
+        /// The difficulty multiplier associated with this rhythm change.
+        /// </summary>
+        public readonly double Difficulty;
+
+        /// <summary>
+        /// The ratio of current <see cref="osu.Game.Rulesets.Difficulty.Preprocessing.DifficultyHitObject.DeltaTime"/>
+        /// to previous <see cref="osu.Game.Rulesets.Difficulty.Preprocessing.DifficultyHitObject.DeltaTime"/> for the rhythm change.
+        /// A <see cref="Ratio"/> above 1 indicates a slow-down; a <see cref="Ratio"/> below 1 indicates a speed-up.
+        /// </summary>
+        public readonly double Ratio;
+
+        /// <summary>
+        /// Creates an object representing a rhythm change.
+        /// </summary>
+        /// <param name="numerator">The numerator for <see cref="Ratio"/>.</param>
+        /// <param name="denominator">The denominator for <see cref="Ratio"/></param>
+        /// <param name="difficulty">The difficulty multiplier associated with this rhythm change.</param>
+        public TaikoDifficultyHitObjectRhythm(int numerator, int denominator, double difficulty)
+        {
+            Ratio = numerator / (double)denominator;
+            Difficulty = difficulty;
+        }
+    }
+}

osu.Game.Rulesets.Taiko/Difficulty/Skills/Colour.cs

@@ -0,0 +1,135 @@
+// 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.Game.Rulesets.Difficulty.Preprocessing;
+using osu.Game.Rulesets.Difficulty.Skills;
+using osu.Game.Rulesets.Difficulty.Utils;
+using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing;
+using osu.Game.Rulesets.Taiko.Objects;
+
+namespace osu.Game.Rulesets.Taiko.Difficulty.Skills
+{
+    /// <summary>
+    /// Calculates the colour coefficient of taiko difficulty.
+    /// </summary>
+    public class Colour : Skill
+    {
+        protected override double SkillMultiplier => 1;
+        protected override double StrainDecayBase => 0.4;
+
+        /// <summary>
+        /// Maximum number of entries to keep in <see cref="monoHistory"/>.
+        /// </summary>
+        private const int mono_history_max_length = 5;
+
+        /// <summary>
+        /// Queue with the lengths of the last <see cref="mono_history_max_length"/> most recent mono (single-colour) patterns,
+        /// with the most recent value at the end of the queue.
+        /// </summary>
+        private readonly LimitedCapacityQueue<int> monoHistory = new LimitedCapacityQueue<int>(mono_history_max_length);
+
+        /// <summary>
+        /// The <see cref="HitType"/> of the last object hit before the one being considered.
+        /// </summary>
+        private HitType? previousHitType;
+
+        /// <summary>
+        /// Length of the current mono pattern.
+        /// </summary>
+        private int currentMonoLength;
+
+        protected override double StrainValueOf(DifficultyHitObject current)
+        {
+            // changing from/to a drum roll or a swell does not constitute a colour change.
+            // hits spaced more than a second apart are also exempt from colour strain.
+            if (!(current.LastObject is Hit && current.BaseObject is Hit && current.DeltaTime < 1000))
+            {
+                monoHistory.Clear();
+
+                var currentHit = current.BaseObject as Hit;
+                currentMonoLength = currentHit != null ? 1 : 0;
+                previousHitType = currentHit?.Type;
+
+                return 0.0;
+            }
+
+            var taikoCurrent = (TaikoDifficultyHitObject)current;
+
+            double objectStrain = 0.0;
+
+            if (previousHitType != null && taikoCurrent.HitType != previousHitType)
+            {
+                // The colour has changed.
+                objectStrain = 1.0;
+
+                if (monoHistory.Count < 2)
+                {
+                    // There needs to be at least two streaks to determine a strain.
+                    objectStrain = 0.0;
+                }
+                else if ((monoHistory[^1] + currentMonoLength) % 2 == 0)
+                {
+                    // The last streak in the history is guaranteed to be a different type to the current streak.
+                    // If the total number of notes in the two streaks is even, nullify this object's strain.
+                    objectStrain = 0.0;
+                }
+
+                objectStrain *= repetitionPenalties();
+                currentMonoLength = 1;
+            }
+            else
+            {
+                currentMonoLength += 1;
+            }
+
+            previousHitType = taikoCurrent.HitType;
+            return objectStrain;
+        }
+
+        /// <summary>
+        /// The penalty to apply due to the length of repetition in colour streaks.
+        /// </summary>
+        private double repetitionPenalties()
+        {
+            const int most_recent_patterns_to_compare = 2;
+            double penalty = 1.0;
+
+            monoHistory.Enqueue(currentMonoLength);
+
+            for (int start = monoHistory.Count - most_recent_patterns_to_compare - 1; start >= 0; start--)
+            {
+                if (!isSamePattern(start, most_recent_patterns_to_compare))
+                    continue;
+
+                int notesSince = 0;
+                for (int i = start; i < monoHistory.Count; i++) notesSince += monoHistory[i];
+                penalty *= repetitionPenalty(notesSince);
+                break;
+            }
+
+            return penalty;
+        }
+
+        /// <summary>
+        /// Determines whether the last <paramref name="mostRecentPatternsToCompare"/> patterns have repeated in the history
+        /// of single-colour note sequences, starting from <paramref name="start"/>.
+        /// </summary>
+        private bool isSamePattern(int start, int mostRecentPatternsToCompare)
+        {
+            for (int i = 0; i < mostRecentPatternsToCompare; i++)
+            {
+                if (monoHistory[start + i] != monoHistory[monoHistory.Count - mostRecentPatternsToCompare + i])
+                    return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Calculates the strain penalty for a colour pattern repetition.
+        /// </summary>
+        /// <param name="notesSince">The number of notes since the last repetition of the pattern.</param>
+        private double repetitionPenalty(int notesSince) => Math.Min(1.0, 0.032 * notesSince);
+    }
+}

osu.Game.Rulesets.Taiko/Difficulty/Skills/Rhythm.cs

@@ -0,0 +1,167 @@
+// 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.Game.Rulesets.Difficulty.Preprocessing;
+using osu.Game.Rulesets.Difficulty.Skills;
+using osu.Game.Rulesets.Difficulty.Utils;
+using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing;
+using osu.Game.Rulesets.Taiko.Objects;
+
+namespace osu.Game.Rulesets.Taiko.Difficulty.Skills
+{
+    /// <summary>
+    /// Calculates the rhythm coefficient of taiko difficulty.
+    /// </summary>
+    public class Rhythm : Skill
+    {
+        protected override double SkillMultiplier => 10;
+        protected override double StrainDecayBase => 0;
+
+        /// <summary>
+        /// The note-based decay for rhythm strain.
+        /// </summary>
+        /// <remarks>
+        /// <see cref="StrainDecayBase"/> is not used here, as it's time- and not note-based.
+        /// </remarks>
+        private const double strain_decay = 0.96;
+
+        /// <summary>
+        /// Maximum number of entries in <see cref="rhythmHistory"/>.
+        /// </summary>
+        private const int rhythm_history_max_length = 8;
+
+        /// <summary>
+        /// Contains the last <see cref="rhythm_history_max_length"/> changes in note sequence rhythms.
+        /// </summary>
+        private readonly LimitedCapacityQueue<TaikoDifficultyHitObject> rhythmHistory = new LimitedCapacityQueue<TaikoDifficultyHitObject>(rhythm_history_max_length);
+
+        /// <summary>
+        /// Contains the rolling rhythm strain.
+        /// Used to apply per-note decay.
+        /// </summary>
+        private double currentStrain;
+
+        /// <summary>
+        /// Number of notes since the last rhythm change has taken place.
+        /// </summary>
+        private int notesSinceRhythmChange;
+
+        protected override double StrainValueOf(DifficultyHitObject current)
+        {
+            // drum rolls and swells are exempt.
+            if (!(current.BaseObject is Hit))
+            {
+                resetRhythmAndStrain();
+                return 0.0;
+            }
+
+            currentStrain *= strain_decay;
+
+            TaikoDifficultyHitObject hitObject = (TaikoDifficultyHitObject)current;
+            notesSinceRhythmChange += 1;
+
+            // rhythm difficulty zero (due to rhythm not changing) => no rhythm strain.
+            if (hitObject.Rhythm.Difficulty == 0.0)
+            {
+                return 0.0;
+            }
+
+            double objectStrain = hitObject.Rhythm.Difficulty;
+
+            objectStrain *= repetitionPenalties(hitObject);
+            objectStrain *= patternLengthPenalty(notesSinceRhythmChange);
+            objectStrain *= speedPenalty(hitObject.DeltaTime);
+
+            // careful - needs to be done here since calls above read this value
+            notesSinceRhythmChange = 0;
+
+            currentStrain += objectStrain;
+            return currentStrain;
+        }
+
+        /// <summary>
+        /// Returns a penalty to apply to the current hit object caused by repeating rhythm changes.
+        /// </summary>
+        /// <remarks>
+        /// Repetitions of more recent patterns are associated with a higher penalty.
+        /// </remarks>
+        /// <param name="hitObject">The current hit object being considered.</param>
+        private double repetitionPenalties(TaikoDifficultyHitObject hitObject)
+        {
+            double penalty = 1;
+
+            rhythmHistory.Enqueue(hitObject);
+
+            for (int mostRecentPatternsToCompare = 2; mostRecentPatternsToCompare <= rhythm_history_max_length / 2; mostRecentPatternsToCompare++)
+            {
+                for (int start = rhythmHistory.Count - mostRecentPatternsToCompare - 1; start >= 0; start--)
+                {
+                    if (!samePattern(start, mostRecentPatternsToCompare))
+                        continue;
+
+                    int notesSince = hitObject.ObjectIndex - rhythmHistory[start].ObjectIndex;
+                    penalty *= repetitionPenalty(notesSince);
+                    break;
+                }
+            }
+
+            return penalty;
+        }
+
+        /// <summary>
+        /// Determines whether the rhythm change pattern starting at <paramref name="start"/> is a repeat of any of the
+        /// <paramref name="mostRecentPatternsToCompare"/>.
+        /// </summary>
+        private bool samePattern(int start, int mostRecentPatternsToCompare)
+        {
+            for (int i = 0; i < mostRecentPatternsToCompare; i++)
+            {
+                if (rhythmHistory[start + i].Rhythm != rhythmHistory[rhythmHistory.Count - mostRecentPatternsToCompare + i].Rhythm)
+                    return false;
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Calculates a single rhythm repetition penalty.
+        /// </summary>
+        /// <param name="notesSince">Number of notes since the last repetition of a rhythm change.</param>
+        private static double repetitionPenalty(int notesSince) => Math.Min(1.0, 0.032 * notesSince);
+
+        /// <summary>
+        /// Calculates a penalty based on the number of notes since the last rhythm change.
+        /// Both rare and frequent rhythm changes are penalised.
+        /// </summary>
+        /// <param name="patternLength">Number of notes since the last rhythm change.</param>
+        private static double patternLengthPenalty(int patternLength)
+        {
+            double shortPatternPenalty = Math.Min(0.15 * patternLength, 1.0);
+            double longPatternPenalty = Math.Clamp(2.5 - 0.15 * patternLength, 0.0, 1.0);
+            return Math.Min(shortPatternPenalty, longPatternPenalty);
+        }
+
+        /// <summary>
+        /// Calculates a penalty for objects that do not require alternating hands.
+        /// </summary>
+        /// <param name="deltaTime">Time (in milliseconds) since the last hit object.</param>
+        private double speedPenalty(double deltaTime)
+        {
+            if (deltaTime < 80) return 1;
+            if (deltaTime < 210) return Math.Max(0, 1.4 - 0.005 * deltaTime);
+
+            resetRhythmAndStrain();
+            return 0.0;
+        }
+
+        /// <summary>
+        /// Resets the rolling strain value and <see cref="notesSinceRhythmChange"/> counter.
+        /// </summary>
+        private void resetRhythmAndStrain()
+        {
+            currentStrain = 0.0;
+            notesSinceRhythmChange = 0;
+        }
+    }
+}

osu.Game.Rulesets.Taiko/Difficulty/Skills/Stamina.cs

@@ -0,0 +1,113 @@
+// 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 osu.Game.Rulesets.Difficulty.Preprocessing;
+using osu.Game.Rulesets.Difficulty.Skills;
+using osu.Game.Rulesets.Difficulty.Utils;
+using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing;
+using osu.Game.Rulesets.Taiko.Objects;
+
+namespace osu.Game.Rulesets.Taiko.Difficulty.Skills
+{
+    /// <summary>
+    /// Calculates the stamina coefficient of taiko difficulty.
+    /// </summary>
+    /// <remarks>
+    /// The reference play style chosen uses two hands, with full alternating (the hand changes after every hit).
+    /// </remarks>
+    public class Stamina : Skill
+    {
+        protected override double SkillMultiplier => 1;
+        protected override double StrainDecayBase => 0.4;
+
+        /// <summary>
+        /// Maximum number of entries to keep in <see cref="notePairDurationHistory"/>.
+        /// </summary>
+        private const int max_history_length = 2;
+
+        /// <summary>
+        /// The index of the hand this <see cref="Stamina"/> instance is associated with.
+        /// </summary>
+        /// <remarks>
+        /// The value of 0 indicates the left hand (full alternating gameplay starting with left hand is assumed).
+        /// This naturally translates onto index offsets of the objects in the map.
+        /// </remarks>
+        private readonly int hand;
+
+        /// <summary>
+        /// Stores the last <see cref="max_history_length"/> durations between notes hit with the hand indicated by <see cref="hand"/>.
+        /// </summary>
+        private readonly LimitedCapacityQueue<double> notePairDurationHistory = new LimitedCapacityQueue<double>(max_history_length);
+
+        /// <summary>
+        /// Stores the <see cref="DifficultyHitObject.DeltaTime"/> of the last object that was hit by the <i>other</i> hand.
+        /// </summary>
+        private double offhandObjectDuration = double.MaxValue;
+
+        /// <summary>
+        /// Creates a <see cref="Stamina"/> skill.
+        /// </summary>
+        /// <param name="rightHand">Whether this instance is performing calculations for the right hand.</param>
+        public Stamina(bool rightHand)
+        {
+            hand = rightHand ? 1 : 0;
+        }
+
+        protected override double StrainValueOf(DifficultyHitObject current)
+        {
+            if (!(current.BaseObject is Hit))
+            {
+                return 0.0;
+            }
+
+            TaikoDifficultyHitObject hitObject = (TaikoDifficultyHitObject)current;
+
+            if (hitObject.ObjectIndex % 2 == hand)
+            {
+                double objectStrain = 1;
+
+                if (hitObject.ObjectIndex == 1)
+                    return 1;
+
+                notePairDurationHistory.Enqueue(hitObject.DeltaTime + offhandObjectDuration);
+
+                double shortestRecentNote = notePairDurationHistory.Min();
+                objectStrain += speedBonus(shortestRecentNote);
+
+                if (hitObject.StaminaCheese)
+                    objectStrain *= cheesePenalty(hitObject.DeltaTime + offhandObjectDuration);
+
+                return objectStrain;
+            }
+
+            offhandObjectDuration = hitObject.DeltaTime;
+            return 0;
+        }
+
+        /// <summary>
+        /// Applies a penalty for hit objects marked with <see cref="TaikoDifficultyHitObject.StaminaCheese"/>.
+        /// </summary>
+        /// <param name="notePairDuration">The duration between the current and previous note hit using the hand indicated by <see cref="hand"/>.</param>
+        private double cheesePenalty(double notePairDuration)
+        {
+            if (notePairDuration > 125) return 1;
+            if (notePairDuration < 100) return 0.6;
+
+            return 0.6 + (notePairDuration - 100) * 0.016;
+        }
+
+        /// <summary>
+        /// Applies a speed bonus dependent on the time since the last hit performed using this hand.
+        /// </summary>
+        /// <param name="notePairDuration">The duration between the current and previous note hit using the hand indicated by <see cref="hand"/>.</param>
+        private double speedBonus(double notePairDuration)
+        {
+            if (notePairDuration >= 200) return 0;
+
+            double bonus = 200 - notePairDuration;
+            bonus *= bonus;
+            return bonus / 100000;
+        }
+    }
+}

osu.Game.Rulesets.Taiko/Difficulty/Skills/Strain.cs

@@ -1,95 +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.Game.Rulesets.Difficulty.Preprocessing;
-using osu.Game.Rulesets.Difficulty.Skills;
-using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing;
-using osu.Game.Rulesets.Taiko.Objects;
-
-namespace osu.Game.Rulesets.Taiko.Difficulty.Skills
-{
-    public class Strain : Skill
-    {
-        private const double rhythm_change_base_threshold = 0.2;
-        private const double rhythm_change_base = 2.0;
-
-        protected override double SkillMultiplier => 1;
-        protected override double StrainDecayBase => 0.3;
-
-        private ColourSwitch lastColourSwitch = ColourSwitch.None;
-
-        private int sameColourCount = 1;
-
-        protected override double StrainValueOf(DifficultyHitObject current)
-        {
-            double addition = 1;
-
-            // We get an extra addition if we are not a slider or spinner
-            if (current.LastObject is Hit && current.BaseObject is Hit && current.BaseObject.StartTime - current.LastObject.StartTime < 1000)
-            {
-                if (hasColourChange(current))
-                    addition += 0.75;
-
-                if (hasRhythmChange(current))
-                    addition += 1;
-            }
-            else
-            {
-                lastColourSwitch = ColourSwitch.None;
-                sameColourCount = 1;
-            }
-
-            double additionFactor = 1;
-
-            // Scale the addition factor linearly from 0.4 to 1 for DeltaTime from 0 to 50
-            if (current.DeltaTime < 50)
-                additionFactor = 0.4 + 0.6 * current.DeltaTime / 50;
-
-            return additionFactor * addition;
-        }
-
-        private bool hasRhythmChange(DifficultyHitObject current)
-        {
-            // We don't want a division by zero if some random mapper decides to put two HitObjects at the same time.
-            if (current.DeltaTime == 0 || Previous.Count == 0 || Previous[0].DeltaTime == 0)
-                return false;
-
-            double timeElapsedRatio = Math.Max(Previous[0].DeltaTime / current.DeltaTime, current.DeltaTime / Previous[0].DeltaTime);
-
-            if (timeElapsedRatio >= 8)
-                return false;
-
-            double difference = Math.Log(timeElapsedRatio, rhythm_change_base) % 1.0;
-
-            return difference > rhythm_change_base_threshold && difference < 1 - rhythm_change_base_threshold;
-        }
-
-        private bool hasColourChange(DifficultyHitObject current)
-        {
-            var taikoCurrent = (TaikoDifficultyHitObject)current;
-
-            if (!taikoCurrent.HasTypeChange)
-            {
-                sameColourCount++;
-                return false;
-            }
-
-            var oldColourSwitch = lastColourSwitch;
-            var newColourSwitch = sameColourCount % 2 == 0 ? ColourSwitch.Even : ColourSwitch.Odd;
-
-            lastColourSwitch = newColourSwitch;
-            sameColourCount = 1;
-
-            // We only want a bonus if the parity of the color switch changes
-            return oldColourSwitch != ColourSwitch.None && oldColourSwitch != newColourSwitch;
-        }
-
-        private enum ColourSwitch
-        {
-            None,
-            Even,
-            Odd
-        }
-    }
-}

osu.Game.Rulesets.Taiko/Difficulty/TaikoDifficultyAttributes.cs

@@ -7,7 +7,10 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
 {
     public class TaikoDifficultyAttributes : DifficultyAttributes
     {
+        public double StaminaStrain;
+        public double RhythmStrain;
+        public double ColourStrain;
+        public double ApproachRate;
         public double GreatHitWindow;
-        public int MaxCombo;
     }
 }

osu.Game.Rulesets.Taiko/Difficulty/TaikoDifficultyCalculator.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 osu.Game.Beatmaps;
@@ -19,39 +20,22 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
 {
     public class TaikoDifficultyCalculator : DifficultyCalculator
     {
-        private const double star_scaling_factor = 0.04125;
+        private const double rhythm_skill_multiplier = 0.014;
+        private const double colour_skill_multiplier = 0.01;
+        private const double stamina_skill_multiplier = 0.02;
 
         public TaikoDifficultyCalculator(Ruleset ruleset, WorkingBeatmap beatmap)
             : base(ruleset, beatmap)
         {
         }
 
-        protected override DifficultyAttributes CreateDifficultyAttributes(IBeatmap beatmap, Mod[] mods, Skill[] skills, double clockRate)
+        protected override Skill[] CreateSkills(IBeatmap beatmap) => new Skill[]
         {
-            if (beatmap.HitObjects.Count == 0)
-                return new TaikoDifficultyAttributes { Mods = mods, Skills = skills };
-
-            HitWindows hitWindows = new TaikoHitWindows();
-            hitWindows.SetDifficulty(beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty);
-
-            return new TaikoDifficultyAttributes
-            {
-                StarRating = skills.Single().DifficultyValue() * star_scaling_factor,
-                Mods = mods,
-                // Todo: This int cast is temporary to achieve 1:1 results with osu!stable, and should be removed in the future
-                GreatHitWindow = (int)(hitWindows.WindowFor(HitResult.Great)) / clockRate,
-                MaxCombo = beatmap.HitObjects.Count(h => h is Hit),
-                Skills = skills
+            new Colour(),
+            new Rhythm(),
+            new Stamina(true),
+            new Stamina(false),
         };
-        }
-
-        protected override IEnumerable<DifficultyHitObject> CreateDifficultyHitObjects(IBeatmap beatmap, double clockRate)
-        {
-            for (int i = 1; i < beatmap.HitObjects.Count; i++)
-                yield return new TaikoDifficultyHitObject(beatmap.HitObjects[i], beatmap.HitObjects[i - 1], clockRate);
-        }
-
-        protected override Skill[] CreateSkills(IBeatmap beatmap) => new Skill[] { new Strain() };
 
         protected override Mod[] DifficultyAdjustmentMods => new Mod[]
         {
@@ -60,5 +44,124 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
             new TaikoModEasy(),
             new TaikoModHardRock(),
         };
+
+        protected override IEnumerable<DifficultyHitObject> CreateDifficultyHitObjects(IBeatmap beatmap, double clockRate)
+        {
+            List<TaikoDifficultyHitObject> taikoDifficultyHitObjects = new List<TaikoDifficultyHitObject>();
+
+            for (int i = 2; i < beatmap.HitObjects.Count; i++)
+            {
+                taikoDifficultyHitObjects.Add(
+                    new TaikoDifficultyHitObject(
+                        beatmap.HitObjects[i], beatmap.HitObjects[i - 1], beatmap.HitObjects[i - 2], clockRate, i
+                    )
+                );
+            }
+
+            new StaminaCheeseDetector(taikoDifficultyHitObjects).FindCheese();
+            return taikoDifficultyHitObjects;
+        }
+
+        protected override DifficultyAttributes CreateDifficultyAttributes(IBeatmap beatmap, Mod[] mods, Skill[] skills, double clockRate)
+        {
+            if (beatmap.HitObjects.Count == 0)
+                return new TaikoDifficultyAttributes { Mods = mods, Skills = skills };
+
+            var colour = (Colour)skills[0];
+            var rhythm = (Rhythm)skills[1];
+            var staminaRight = (Stamina)skills[2];
+            var staminaLeft = (Stamina)skills[3];
+
+            double colourRating = colour.DifficultyValue() * colour_skill_multiplier;
+            double rhythmRating = rhythm.DifficultyValue() * rhythm_skill_multiplier;
+            double staminaRating = (staminaRight.DifficultyValue() + staminaLeft.DifficultyValue()) * stamina_skill_multiplier;
+
+            double staminaPenalty = simpleColourPenalty(staminaRating, colourRating);
+            staminaRating *= staminaPenalty;
+
+            double combinedRating = locallyCombinedDifficulty(colour, rhythm, staminaRight, staminaLeft, staminaPenalty);
+            double separatedRating = norm(1.5, colourRating, rhythmRating, staminaRating);
+            double starRating = 1.4 * separatedRating + 0.5 * combinedRating;
+            starRating = rescale(starRating);
+
+            HitWindows hitWindows = new TaikoHitWindows();
+            hitWindows.SetDifficulty(beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty);
+
+            return new TaikoDifficultyAttributes
+            {
+                StarRating = starRating,
+                Mods = mods,
+                StaminaStrain = staminaRating,
+                RhythmStrain = rhythmRating,
+                ColourStrain = colourRating,
+                // Todo: This int cast is temporary to achieve 1:1 results with osu!stable, and should be removed in the future
+                GreatHitWindow = (int)hitWindows.WindowFor(HitResult.Great) / clockRate,
+                MaxCombo = beatmap.HitObjects.Count(h => h is Hit),
+                Skills = skills
+            };
+        }
+
+        /// <summary>
+        /// Calculates the penalty for the stamina skill for maps with low colour difficulty.
+        /// </summary>
+        /// <remarks>
+        /// Some maps (especially converts) can be easy to read despite a high note density.
+        /// This penalty aims to reduce the star rating of such maps by factoring in colour difficulty to the stamina skill.
+        /// </remarks>
+        private double simpleColourPenalty(double staminaDifficulty, double colorDifficulty)
+        {
+            if (colorDifficulty <= 0) return 0.79 - 0.25;
+
+            return 0.79 - Math.Atan(staminaDifficulty / colorDifficulty - 12) / Math.PI / 2;
+        }
+
+        /// <summary>
+        /// Returns the <i>p</i>-norm of an <i>n</i>-dimensional vector.
+        /// </summary>
+        /// <param name="p">The value of <i>p</i> to calculate the norm for.</param>
+        /// <param name="values">The coefficients of the vector.</param>
+        private double norm(double p, params double[] values) => Math.Pow(values.Sum(x => Math.Pow(x, p)), 1 / p);
+
+        /// <summary>
+        /// Returns the partial star rating of the beatmap, calculated using peak strains from all sections of the map.
+        /// </summary>
+        /// <remarks>
+        /// For each section, the peak strains of all separate skills are combined into a single peak strain for the section.
+        /// The resulting partial rating of the beatmap is a weighted sum of the combined peaks (higher peaks are weighted more).
+        /// </remarks>
+        private double locallyCombinedDifficulty(Colour colour, Rhythm rhythm, Stamina staminaRight, Stamina staminaLeft, double staminaPenalty)
+        {
+            List<double> peaks = new List<double>();
+
+            for (int i = 0; i < colour.StrainPeaks.Count; i++)
+            {
+                double colourPeak = colour.StrainPeaks[i] * colour_skill_multiplier;
+                double rhythmPeak = rhythm.StrainPeaks[i] * rhythm_skill_multiplier;
+                double staminaPeak = (staminaRight.StrainPeaks[i] + staminaLeft.StrainPeaks[i]) * stamina_skill_multiplier * staminaPenalty;
+                peaks.Add(norm(2, colourPeak, rhythmPeak, staminaPeak));
+            }
+
+            double difficulty = 0;
+            double weight = 1;
+
+            foreach (double strain in peaks.OrderByDescending(d => d))
+            {
+                difficulty += strain * weight;
+                weight *= 0.9;
+            }
+
+            return difficulty;
+        }
+
+        /// <summary>
+        /// Applies a final re-scaling of the star rating to bring maps with recorded full combos below 9.5 stars.
+        /// </summary>
+        /// <param name="sr">The raw star rating value before re-scaling.</param>
+        private double rescale(double sr)
+        {
+            if (sr < 0) return sr;
+
+            return 10.43 * Math.Log(sr / 8 + 1);
+        }
     }
 }

osu.Game.Rulesets.Taiko/Difficulty/TaikoPerformanceCalculator.cs

@@ -78,10 +78,6 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
             // Penalize misses exponentially. This mainly fixes tag4 maps and the likes until a per-hitobject solution is available
             strainValue *= Math.Pow(0.985, countMiss);
 
-            // Combo scaling
-            if (Attributes.MaxCombo > 0)
-                strainValue *= Math.Min(Math.Pow(Score.MaxCombo, 0.5) / Math.Pow(Attributes.MaxCombo, 0.5), 1.0);
-
             if (mods.Any(m => m is ModHidden))
                 strainValue *= 1.025;
 

osu.Game.Rulesets.Taiko/Edit/DrumRollCompositionTool.cs

@@ -1,6 +1,8 @@
 // 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.Graphics;
+using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
 using osu.Game.Rulesets.Taiko.Edit.Blueprints;
@@ -15,6 +17,8 @@ namespace osu.Game.Rulesets.Taiko.Edit
         {
         }
 
+        public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Sliders);
+
         public override PlacementBlueprint CreatePlacementBlueprint() => new DrumRollPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Taiko/Edit/HitCompositionTool.cs

@@ -1,6 +1,8 @@
 // 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.Graphics;
+using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
 using osu.Game.Rulesets.Taiko.Edit.Blueprints;
@@ -15,6 +17,8 @@ namespace osu.Game.Rulesets.Taiko.Edit
         {
         }
 
+        public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Circles);
+
         public override PlacementBlueprint CreatePlacementBlueprint() => new HitPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Taiko/Edit/SwellCompositionTool.cs

@@ -1,6 +1,8 @@
 // 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.Graphics;
+using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
 using osu.Game.Rulesets.Taiko.Edit.Blueprints;
@@ -15,6 +17,8 @@ namespace osu.Game.Rulesets.Taiko.Edit
         {
         }
 
+        public override Drawable CreateIcon() => new BeatmapStatisticIcon(BeatmapStatisticsIconType.Spinners);
+
         public override PlacementBlueprint CreatePlacementBlueprint() => new SwellPlacementBlueprint();
     }
 }

osu.Game.Rulesets.Taiko/TaikoRuleset.cs

@@ -22,7 +22,6 @@ using osu.Game.Rulesets.Taiko.Scoring;
 using osu.Game.Scoring;
 using System;
 using System.Linq;
-using osu.Framework.Testing;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Taiko.Edit;
 using osu.Game.Rulesets.Taiko.Objects;
@@ -32,7 +31,6 @@ using osu.Game.Skinning;
 
 namespace osu.Game.Rulesets.Taiko
 {
-    [ExcludeFromDynamicCompile]
     public class TaikoRuleset : Ruleset, ILegacyRuleset
     {
         public override DrawableRuleset CreateDrawableRulesetWith(IBeatmap beatmap, IReadOnlyList<Mod> mods = null) => new DrawableTaikoRuleset(this, beatmap, mods);

osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapEncoderTest.cs

@@ -10,6 +10,7 @@ using System.Text;
 using NUnit.Framework;
 using osu.Framework.Audio.Track;
 using osu.Framework.Graphics.Textures;
+using osu.Framework.IO.Stores;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Beatmaps.Formats;
@@ -19,6 +20,7 @@ using osu.Game.Rulesets.Catch;
 using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Taiko;
+using osu.Game.Skinning;
 using osu.Game.Tests.Resources;
 
 namespace osu.Game.Tests.Beatmaps.Formats
@@ -26,18 +28,33 @@ namespace osu.Game.Tests.Beatmaps.Formats
     [TestFixture]
     public class LegacyBeatmapEncoderTest
     {
-        private static IEnumerable<string> allBeatmaps => TestResources.GetStore().GetAvailableResources().Where(res => res.EndsWith(".osu"));
+        private static readonly DllResourceStore beatmaps_resource_store = TestResources.GetStore();
+
+        private static IEnumerable<string> allBeatmaps = beatmaps_resource_store.GetAvailableResources().Where(res => res.EndsWith(".osu"));
 
         [TestCaseSource(nameof(allBeatmaps))]
         public void TestEncodeDecodeStability(string name)
         {
-            var decoded = decodeFromLegacy(TestResources.GetStore().GetStream(name));
-            var decodedAfterEncode = decodeFromLegacy(encodeToLegacy(decoded));
+            var decoded = decodeFromLegacy(beatmaps_resource_store.GetStream(name), name);
+            var decodedAfterEncode = decodeFromLegacy(encodeToLegacy(decoded), name);
 
-            sort(decoded);
-            sort(decodedAfterEncode);
+            sort(decoded.beatmap);
+            sort(decodedAfterEncode.beatmap);
 
-            Assert.That(decodedAfterEncode.Serialize(), Is.EqualTo(decoded.Serialize()));
+            Assert.That(decodedAfterEncode.beatmap.Serialize(), Is.EqualTo(decoded.beatmap.Serialize()));
+            Assert.IsTrue(areComboColoursEqual(decodedAfterEncode.beatmapSkin.Configuration, decoded.beatmapSkin.Configuration));
+        }
+
+        private bool areComboColoursEqual(IHasComboColours a, IHasComboColours b)
+        {
+            // equal to null, no need to SequenceEqual
+            if (a.ComboColours == null && b.ComboColours == null)
+                return true;
+
+            if (a.ComboColours == null || b.ComboColours == null)
+                return false;
+
+            return a.ComboColours.SequenceEqual(b.ComboColours);
         }
 
         private void sort(IBeatmap beatmap)
@@ -50,18 +67,31 @@ namespace osu.Game.Tests.Beatmaps.Formats
             }
         }
 
-        private IBeatmap decodeFromLegacy(Stream stream)
+        private (IBeatmap beatmap, TestLegacySkin beatmapSkin) decodeFromLegacy(Stream stream, string name)
         {
             using (var reader = new LineBufferedReader(stream))
-                return convert(new LegacyBeatmapDecoder { ApplyOffsets = false }.Decode(reader));
+            {
+                var beatmap = new LegacyBeatmapDecoder { ApplyOffsets = false }.Decode(reader);
+                var beatmapSkin = new TestLegacySkin(beatmaps_resource_store, name);
+                return (convert(beatmap), beatmapSkin);
+            }
         }
 
-        private Stream encodeToLegacy(IBeatmap beatmap)
+        private class TestLegacySkin : LegacySkin
         {
+            public TestLegacySkin(IResourceStore<byte[]> storage, string fileName)
+                : base(new SkinInfo { Name = "Test Skin", Creator = "Craftplacer" }, storage, null, fileName)
+            {
+            }
+        }
+
+        private Stream encodeToLegacy((IBeatmap beatmap, ISkin beatmapSkin) fullBeatmap)
+        {
+            var (beatmap, beatmapSkin) = fullBeatmap;
             var stream = new MemoryStream();
 
             using (var writer = new StreamWriter(stream, Encoding.UTF8, 1024, true))
-                new LegacyBeatmapEncoder(beatmap).Encode(writer);
+                new LegacyBeatmapEncoder(beatmap, beatmapSkin).Encode(writer);
 
             stream.Position = 0;
 
@@ -106,7 +136,7 @@ namespace osu.Game.Tests.Beatmaps.Formats
 
             protected override Texture GetBackground() => throw new NotImplementedException();
 
-            protected override Track GetTrack() => throw new NotImplementedException();
+            protected override Track GetBeatmapTrack() => throw new NotImplementedException();
         }
     }
 }

osu.Game.Tests/Beatmaps/Formats/OsuJsonDecoderTest.cs

@@ -11,6 +11,8 @@ using osu.Game.Beatmaps.Formats;
 using osu.Game.IO;
 using osu.Game.IO.Serialization;
 using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Rulesets.Osu.Beatmaps;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Tests.Resources;
 using osuTK;
@@ -90,6 +92,38 @@ namespace osu.Game.Tests.Beatmaps.Formats
             Assert.AreEqual(2, difficulty.SliderTickRate);
         }
 
+        [Test]
+        public void TestDecodePostConverted()
+        {
+            var converted = new OsuBeatmapConverter(decodeAsJson(normal), new OsuRuleset()).Convert();
+
+            var processor = new OsuBeatmapProcessor(converted);
+
+            processor.PreProcess();
+            foreach (var o in converted.HitObjects)
+                o.ApplyDefaults(converted.ControlPointInfo, converted.BeatmapInfo.BaseDifficulty);
+            processor.PostProcess();
+
+            var beatmap = converted.Serialize().Deserialize<Beatmap>();
+
+            var curveData = beatmap.HitObjects[0] as IHasPathWithRepeats;
+            var positionData = beatmap.HitObjects[0] as IHasPosition;
+
+            Assert.IsNotNull(positionData);
+            Assert.IsNotNull(curveData);
+            Assert.AreEqual(90, curveData.Path.Distance);
+            Assert.AreEqual(new Vector2(192, 168), positionData.Position);
+            Assert.AreEqual(956, beatmap.HitObjects[0].StartTime);
+            Assert.IsTrue(beatmap.HitObjects[0].Samples.Any(s => s.Name == HitSampleInfo.HIT_NORMAL));
+
+            positionData = beatmap.HitObjects[1] as IHasPosition;
+
+            Assert.IsNotNull(positionData);
+            Assert.AreEqual(new Vector2(304, 56), positionData.Position);
+            Assert.AreEqual(1285, beatmap.HitObjects[1].StartTime);
+            Assert.IsTrue(beatmap.HitObjects[1].Samples.Any(s => s.Name == HitSampleInfo.HIT_CLAP));
+        }
+
         [Test]
         public void TestDecodeHitObjects()
         {
@@ -100,6 +134,7 @@ namespace osu.Game.Tests.Beatmaps.Formats
 
             Assert.IsNotNull(positionData);
             Assert.IsNotNull(curveData);
+            Assert.AreEqual(90, curveData.Path.Distance);
             Assert.AreEqual(new Vector2(192, 168), positionData.Position);
             Assert.AreEqual(956, beatmap.HitObjects[0].StartTime);
             Assert.IsTrue(beatmap.HitObjects[0].Samples.Any(s => s.Name == HitSampleInfo.HIT_NORMAL));

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

@@ -15,8 +15,10 @@ using osu.Framework.Extensions;
 using osu.Framework.Logging;
 using osu.Game.Beatmaps;
 using osu.Game.IO;
+using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Tests.Resources;
+using osu.Game.Users;
 using SharpCompress.Archives;
 using SharpCompress.Archives.Zip;
 using SharpCompress.Common;
@@ -32,7 +34,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportWhenClosed()
         {
             // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportWhenClosed)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -49,7 +51,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportThenDelete()
         {
             // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenDelete)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -70,7 +72,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportThenImport()
         {
             // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenImport)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -96,7 +98,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestImportThenImportWithReZip()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenImportWithReZip)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -154,7 +156,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestImportThenImportWithChangedFile()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenImportWithChangedFile)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -205,7 +207,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestImportThenImportWithDifferentFilename()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenImportWithDifferentFilename)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -257,7 +259,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportCorruptThenImport()
         {
             // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportCorruptThenImport)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -299,7 +301,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestRollbackOnFailure()
         {
             // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestRollbackOnFailure)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -376,7 +378,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportThenDeleteThenImport()
         {
             // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenDeleteThenImport)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -404,7 +406,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportThenDeleteThenImportWithOnlineIDMismatch(bool set)
         {
             // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost($"{nameof(TestImportThenDeleteThenImportWithOnlineIDMismatch)}-{set}"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(set.ToString()))
             {
                 try
                 {
@@ -438,7 +440,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportWithDuplicateBeatmapIDs()
         {
             // unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportWithDuplicateBeatmapIDs)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -524,7 +526,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestImportWhenFileOpen()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportWhenFileOpen)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -546,7 +548,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestImportWithDuplicateHashes()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportWithDuplicateHashes)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -588,7 +590,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestImportNestedStructure()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportNestedStructure)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -633,7 +635,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestImportWithIgnoredDirectoryInArchive()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportWithIgnoredDirectoryInArchive)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -687,7 +689,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestUpdateBeatmapInfo()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestUpdateBeatmapInfo)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -717,7 +719,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestUpdateBeatmapFile()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestUpdateBeatmapFile)))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -756,6 +758,63 @@ namespace osu.Game.Tests.Beatmaps.IO
             }
         }
 
+        [Test]
+        public void TestCreateNewEmptyBeatmap()
+        {
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
+            {
+                try
+                {
+                    var osu = loadOsu(host);
+                    var manager = osu.Dependencies.Get<BeatmapManager>();
+
+                    var working = manager.CreateNew(new OsuRuleset().RulesetInfo, User.SYSTEM_USER);
+
+                    manager.Save(working.BeatmapInfo, working.Beatmap);
+
+                    var retrievedSet = manager.GetAllUsableBeatmapSets()[0];
+
+                    // Check that the new file is referenced correctly by attempting a retrieval
+                    Beatmap updatedBeatmap = (Beatmap)manager.GetWorkingBeatmap(retrievedSet.Beatmaps[0]).Beatmap;
+                    Assert.That(updatedBeatmap.HitObjects.Count, Is.EqualTo(0));
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+        }
+
+        [Test]
+        public void TestCreateNewBeatmapWithObject()
+        {
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
+            {
+                try
+                {
+                    var osu = loadOsu(host);
+                    var manager = osu.Dependencies.Get<BeatmapManager>();
+
+                    var working = manager.CreateNew(new OsuRuleset().RulesetInfo, User.SYSTEM_USER);
+
+                    ((Beatmap)working.Beatmap).HitObjects.Add(new HitCircle { StartTime = 5000 });
+
+                    manager.Save(working.BeatmapInfo, working.Beatmap);
+
+                    var retrievedSet = manager.GetAllUsableBeatmapSets()[0];
+
+                    // Check that the new file is referenced correctly by attempting a retrieval
+                    Beatmap updatedBeatmap = (Beatmap)manager.GetWorkingBeatmap(retrievedSet.Beatmaps[0]).Beatmap;
+                    Assert.That(updatedBeatmap.HitObjects.Count, Is.EqualTo(1));
+                    Assert.That(updatedBeatmap.HitObjects[0].StartTime, Is.EqualTo(5000));
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+        }
+
         public static async Task<BeatmapSetInfo> LoadOszIntoOsu(OsuGameBase osu, string path = null, bool virtualTrack = false)
         {
             var temp = path ?? TestResources.GetTestBeatmapForImport(virtualTrack);

osu.Game.Tests/Beatmaps/TestSceneEditorBeatmap.cs

@@ -23,15 +23,19 @@ namespace osu.Game.Tests.Beatmaps
         [Test]
         public void TestHitObjectAddEvent()
         {
-            var editorBeatmap = new EditorBeatmap(new OsuBeatmap());
-
-            HitObject addedObject = null;
-            editorBeatmap.HitObjectAdded += h => addedObject = h;
-
             var hitCircle = new HitCircle();
 
-            editorBeatmap.Add(hitCircle);
-            Assert.That(addedObject, Is.EqualTo(hitCircle));
+            HitObject addedObject = null;
+            EditorBeatmap editorBeatmap = null;
+
+            AddStep("add beatmap", () =>
+            {
+                Child = editorBeatmap = new EditorBeatmap(new OsuBeatmap());
+                editorBeatmap.HitObjectAdded += h => addedObject = h;
+            });
+
+            AddStep("add hitobject", () => editorBeatmap.Add(hitCircle));
+            AddAssert("received add event", () => addedObject == hitCircle);
         }
 
         /// <summary>
@@ -41,13 +45,15 @@ namespace osu.Game.Tests.Beatmaps
         public void HitObjectRemoveEvent()
         {
             var hitCircle = new HitCircle();
-            var editorBeatmap = new EditorBeatmap(new OsuBeatmap { HitObjects = { hitCircle } });
-
             HitObject removedObject = null;
+            EditorBeatmap editorBeatmap = null;
+            AddStep("add beatmap", () =>
+            {
+                Child = editorBeatmap = new EditorBeatmap(new OsuBeatmap { HitObjects = { hitCircle } });
                 editorBeatmap.HitObjectRemoved += h => removedObject = h;
-
-            editorBeatmap.Remove(hitCircle);
-            Assert.That(removedObject, Is.EqualTo(hitCircle));
+            });
+            AddStep("remove hitobject", () => editorBeatmap.Remove(editorBeatmap.HitObjects.First()));
+            AddAssert("received remove event", () => removedObject == hitCircle);
         }
 
         /// <summary>
@@ -147,6 +153,7 @@ namespace osu.Game.Tests.Beatmaps
         public void TestResortWhenStartTimeChanged()
         {
             var hitCircle = new HitCircle { StartTime = 1000 };
+
             var editorBeatmap = new EditorBeatmap(new OsuBeatmap
             {
                 HitObjects =

osu.Game.Tests/Collections/IO/ImportCollectionsTest.cs

@@ -0,0 +1,221 @@
+// 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.IO;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Platform;
+using osu.Game.Collections;
+using osu.Game.Tests.Resources;
+
+namespace osu.Game.Tests.Collections.IO
+{
+    [TestFixture]
+    public class ImportCollectionsTest
+    {
+        [Test]
+        public async Task TestImportEmptyDatabase()
+        {
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
+            {
+                try
+                {
+                    var osu = loadOsu(host);
+
+                    await osu.CollectionManager.Import(new MemoryStream());
+
+                    Assert.That(osu.CollectionManager.Collections.Count, Is.Zero);
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+        }
+
+        [Test]
+        public async Task TestImportWithNoBeatmaps()
+        {
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
+            {
+                try
+                {
+                    var osu = loadOsu(host);
+
+                    await osu.CollectionManager.Import(TestResources.OpenResource("Collections/collections.db"));
+
+                    Assert.That(osu.CollectionManager.Collections.Count, Is.EqualTo(2));
+
+                    Assert.That(osu.CollectionManager.Collections[0].Name.Value, Is.EqualTo("First"));
+                    Assert.That(osu.CollectionManager.Collections[0].Beatmaps.Count, Is.Zero);
+
+                    Assert.That(osu.CollectionManager.Collections[1].Name.Value, Is.EqualTo("Second"));
+                    Assert.That(osu.CollectionManager.Collections[1].Beatmaps.Count, Is.Zero);
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+        }
+
+        [Test]
+        public async Task TestImportWithBeatmaps()
+        {
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
+            {
+                try
+                {
+                    var osu = loadOsu(host, true);
+
+                    await osu.CollectionManager.Import(TestResources.OpenResource("Collections/collections.db"));
+
+                    Assert.That(osu.CollectionManager.Collections.Count, Is.EqualTo(2));
+
+                    Assert.That(osu.CollectionManager.Collections[0].Name.Value, Is.EqualTo("First"));
+                    Assert.That(osu.CollectionManager.Collections[0].Beatmaps.Count, Is.EqualTo(1));
+
+                    Assert.That(osu.CollectionManager.Collections[1].Name.Value, Is.EqualTo("Second"));
+                    Assert.That(osu.CollectionManager.Collections[1].Beatmaps.Count, Is.EqualTo(12));
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+        }
+
+        [Test]
+        public async Task TestImportMalformedDatabase()
+        {
+            bool exceptionThrown = false;
+            UnhandledExceptionEventHandler setException = (_, __) => exceptionThrown = true;
+
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
+            {
+                try
+                {
+                    AppDomain.CurrentDomain.UnhandledException += setException;
+
+                    var osu = loadOsu(host, true);
+
+                    using (var ms = new MemoryStream())
+                    {
+                        using (var bw = new BinaryWriter(ms, Encoding.UTF8, true))
+                        {
+                            for (int i = 0; i < 10000; i++)
+                                bw.Write((byte)i);
+                        }
+
+                        ms.Seek(0, SeekOrigin.Begin);
+
+                        await osu.CollectionManager.Import(ms);
+                    }
+
+                    Assert.That(host.UpdateThread.Running, Is.True);
+                    Assert.That(exceptionThrown, Is.False);
+                    Assert.That(osu.CollectionManager.Collections.Count, Is.EqualTo(0));
+                }
+                finally
+                {
+                    host.Exit();
+                    AppDomain.CurrentDomain.UnhandledException -= setException;
+                }
+            }
+        }
+
+        [Test]
+        public async Task TestSaveAndReload()
+        {
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
+            {
+                try
+                {
+                    var osu = loadOsu(host, true);
+
+                    await osu.CollectionManager.Import(TestResources.OpenResource("Collections/collections.db"));
+
+                    // Move first beatmap from second collection into the first.
+                    osu.CollectionManager.Collections[0].Beatmaps.Add(osu.CollectionManager.Collections[1].Beatmaps[0]);
+                    osu.CollectionManager.Collections[1].Beatmaps.RemoveAt(0);
+
+                    // Rename the second collecction.
+                    osu.CollectionManager.Collections[1].Name.Value = "Another";
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+
+            using (HeadlessGameHost host = new HeadlessGameHost("TestSaveAndReload"))
+            {
+                try
+                {
+                    var osu = loadOsu(host, true);
+
+                    Assert.That(osu.CollectionManager.Collections.Count, Is.EqualTo(2));
+
+                    Assert.That(osu.CollectionManager.Collections[0].Name.Value, Is.EqualTo("First"));
+                    Assert.That(osu.CollectionManager.Collections[0].Beatmaps.Count, Is.EqualTo(2));
+
+                    Assert.That(osu.CollectionManager.Collections[1].Name.Value, Is.EqualTo("Another"));
+                    Assert.That(osu.CollectionManager.Collections[1].Beatmaps.Count, Is.EqualTo(11));
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+        }
+
+        private TestOsuGameBase loadOsu(GameHost host, bool withBeatmap = false)
+        {
+            var osu = new TestOsuGameBase(withBeatmap);
+
+#pragma warning disable 4014
+            Task.Run(() => host.Run(osu));
+#pragma warning restore 4014
+
+            waitForOrAssert(() => osu.IsLoaded, @"osu! failed to start in a reasonable amount of time");
+
+            return osu;
+        }
+
+        private void waitForOrAssert(Func<bool> result, string failureMessage, int timeout = 60000)
+        {
+            Task task = Task.Run(() =>
+            {
+                while (!result()) Thread.Sleep(200);
+            });
+
+            Assert.IsTrue(task.Wait(timeout), failureMessage);
+        }
+
+        private class TestOsuGameBase : OsuGameBase
+        {
+            public CollectionManager CollectionManager { get; private set; }
+
+            private readonly bool withBeatmap;
+
+            public TestOsuGameBase(bool withBeatmap)
+            {
+                this.withBeatmap = withBeatmap;
+            }
+
+            [BackgroundDependencyLoader]
+            private void load()
+            {
+                // Beatmap must be imported before the collection manager is loaded.
+                if (withBeatmap)
+                    BeatmapManager.Import(TestResources.GetTestBeatmapForImport()).Wait();
+
+                AddInternal(CollectionManager = new CollectionManager(Storage));
+            }
+        }
+    }
+}

osu.Game.Tests/Editing/LegacyEditorBeatmapPatcherTest.cs

@@ -351,7 +351,7 @@ namespace osu.Game.Tests.Editing
             using (var encoded = new MemoryStream())
             {
                 using (var sw = new StreamWriter(encoded))
-                    new LegacyBeatmapEncoder(beatmap).Encode(sw);
+                    new LegacyBeatmapEncoder(beatmap, null).Encode(sw);
 
                 return encoded.ToArray();
             }

osu.Game.Tests/Gameplay/TestSceneGameplayClockContainer.cs

@@ -1,10 +1,8 @@
 // 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.Testing;
-using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.Play;
 using osu.Game.Tests.Visual;
@@ -19,7 +17,14 @@ namespace osu.Game.Tests.Gameplay
         {
             GameplayClockContainer gcc = null;
 
-            AddStep("create container", () => Add(gcc = new GameplayClockContainer(CreateWorkingBeatmap(new OsuRuleset().RulesetInfo), Array.Empty<Mod>(), 0)));
+            AddStep("create container", () =>
+            {
+                var working = CreateWorkingBeatmap(new OsuRuleset().RulesetInfo);
+                working.LoadTrack();
+
+                Add(gcc = new GameplayClockContainer(working, 0));
+            });
+
             AddStep("start track", () => gcc.Start());
             AddUntilStep("elapsed greater than zero", () => gcc.GameplayClock.ElapsedFrameTime > 0);
         }

osu.Game.Tests/Gameplay/TestSceneScoreProcessor.cs

@@ -28,6 +28,20 @@ namespace osu.Game.Tests.Gameplay
             Assert.That(scoreProcessor.TotalScore.Value, Is.EqualTo(0.0));
         }
 
+        [Test]
+        public void TestOnlyBonusScore()
+        {
+            var beatmap = new Beatmap<TestBonusHitObject> { HitObjects = { new TestBonusHitObject() } };
+
+            var scoreProcessor = new ScoreProcessor();
+            scoreProcessor.ApplyBeatmap(beatmap);
+
+            // Apply a judgement
+            scoreProcessor.ApplyResult(new JudgementResult(new TestBonusHitObject(), new TestBonusJudgement()) { Type = HitResult.Perfect });
+
+            Assert.That(scoreProcessor.TotalScore.Value, Is.EqualTo(100));
+        }
+
         private class TestHitObject : HitObject
         {
             public override Judgement CreateJudgement() => new TestJudgement();
@@ -37,5 +51,17 @@ namespace osu.Game.Tests.Gameplay
         {
             protected override int NumericResultFor(HitResult result) => 100;
         }
+
+        private class TestBonusHitObject : HitObject
+        {
+            public override Judgement CreateJudgement() => new TestBonusJudgement();
+        }
+
+        private class TestBonusJudgement : Judgement
+        {
+            public override bool AffectsCombo => false;
+
+            protected override int NumericResultFor(HitResult result) => 100;
+        }
     }
 }

osu.Game.Tests/Gameplay/TestSceneStoryboardSamples.cs

@@ -59,7 +59,10 @@ namespace osu.Game.Tests.Gameplay
 
             AddStep("create container", () =>
             {
-                Add(gameplayContainer = new GameplayClockContainer(CreateWorkingBeatmap(new OsuRuleset().RulesetInfo), Array.Empty<Mod>(), 0));
+                var working = CreateWorkingBeatmap(new OsuRuleset().RulesetInfo);
+                working.LoadTrack();
+
+                Add(gameplayContainer = new GameplayClockContainer(working, 0));
 
                 gameplayContainer.Add(sample = new DrawableStoryboardSample(new StoryboardSampleInfo(string.Empty, 0, 1))
                 {
@@ -103,7 +106,7 @@ namespace osu.Game.Tests.Gameplay
                 Beatmap.Value = new TestCustomSkinWorkingBeatmap(new OsuRuleset().RulesetInfo, Audio);
                 SelectedMods.Value = new[] { testedMod };
 
-                Add(gameplayContainer = new GameplayClockContainer(Beatmap.Value, SelectedMods.Value, 0));
+                Add(gameplayContainer = new GameplayClockContainer(Beatmap.Value, 0));
 
                 gameplayContainer.Add(sample = new TestDrawableStoryboardSample(new StoryboardSampleInfo("test-sample", 1, 1))
                 {

osu.Game.Tests/NonVisual/LimitedCapacityQueueTest.cs

@@ -0,0 +1,119 @@
+// 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.Game.Rulesets.Difficulty.Utils;
+
+namespace osu.Game.Tests.NonVisual
+{
+    [TestFixture]
+    public class LimitedCapacityQueueTest
+    {
+        private const int capacity = 3;
+
+        private LimitedCapacityQueue<int> queue;
+
+        [SetUp]
+        public void SetUp()
+        {
+            queue = new LimitedCapacityQueue<int>(capacity);
+        }
+
+        [Test]
+        public void TestEmptyQueue()
+        {
+            Assert.AreEqual(0, queue.Count);
+
+            Assert.Throws<ArgumentOutOfRangeException>(() => _ = queue[0]);
+
+            Assert.Throws<InvalidOperationException>(() => _ = queue.Dequeue());
+
+            int count = 0;
+            foreach (var _ in queue)
+                count++;
+
+            Assert.AreEqual(0, count);
+        }
+
+        [TestCase(1)]
+        [TestCase(2)]
+        [TestCase(3)]
+        public void TestBelowCapacity(int count)
+        {
+            for (int i = 0; i < count; ++i)
+                queue.Enqueue(i);
+
+            Assert.AreEqual(count, queue.Count);
+
+            for (int i = 0; i < count; ++i)
+                Assert.AreEqual(i, queue[i]);
+
+            int j = 0;
+            foreach (var item in queue)
+                Assert.AreEqual(j++, item);
+
+            for (int i = queue.Count; i < queue.Count + capacity; i++)
+                Assert.Throws<ArgumentOutOfRangeException>(() => _ = queue[i]);
+        }
+
+        [TestCase(4)]
+        [TestCase(5)]
+        [TestCase(6)]
+        public void TestEnqueueAtFullCapacity(int count)
+        {
+            for (int i = 0; i < count; ++i)
+                queue.Enqueue(i);
+
+            Assert.AreEqual(capacity, queue.Count);
+
+            for (int i = 0; i < queue.Count; ++i)
+                Assert.AreEqual(count - capacity + i, queue[i]);
+
+            int j = count - capacity;
+            foreach (var item in queue)
+                Assert.AreEqual(j++, item);
+
+            for (int i = queue.Count; i < queue.Count + capacity; i++)
+                Assert.Throws<ArgumentOutOfRangeException>(() => _ = queue[i]);
+        }
+
+        [TestCase(4)]
+        [TestCase(5)]
+        [TestCase(6)]
+        public void TestDequeueAtFullCapacity(int count)
+        {
+            for (int i = 0; i < count; ++i)
+                queue.Enqueue(i);
+
+            for (int i = 0; i < capacity; ++i)
+            {
+                Assert.AreEqual(count - capacity + i, queue.Dequeue());
+                Assert.AreEqual(2 - i, queue.Count);
+            }
+
+            Assert.Throws<InvalidOperationException>(() => queue.Dequeue());
+        }
+
+        [Test]
+        public void TestClearQueue()
+        {
+            queue.Enqueue(3);
+            queue.Enqueue(5);
+            Assert.AreEqual(2, queue.Count);
+
+            queue.Clear();
+            Assert.AreEqual(0, queue.Count);
+            Assert.Throws<ArgumentOutOfRangeException>(() => _ = queue[0]);
+
+            queue.Enqueue(7);
+            Assert.AreEqual(1, queue.Count);
+            Assert.AreEqual(7, queue[0]);
+            Assert.Throws<ArgumentOutOfRangeException>(() => _ = queue[1]);
+
+            queue.Enqueue(9);
+            Assert.AreEqual(2, queue.Count);
+            Assert.AreEqual(9, queue[1]);
+        }
+    }
+}

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

@@ -27,7 +27,7 @@ namespace osu.Game.Tests.Scores.IO
         [Test]
         public async Task TestBasicImport()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestBasicImport"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -66,7 +66,7 @@ namespace osu.Game.Tests.Scores.IO
         [Test]
         public async Task TestImportMods()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportMods"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -92,7 +92,7 @@ namespace osu.Game.Tests.Scores.IO
         [Test]
         public async Task TestImportStatistics()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportStatistics"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -122,7 +122,7 @@ namespace osu.Game.Tests.Scores.IO
         [Test]
         public async Task TestImportWithDeletedBeatmapSet()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportWithDeletedBeatmapSet"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {
@@ -159,7 +159,7 @@ namespace osu.Game.Tests.Scores.IO
         [Test]
         public async Task TestOnlineScoreIsAvailableLocally()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestOnlineScoreIsAvailableLocally"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost())
             {
                 try
                 {

osu.Game.Tests/Skins/TestSceneBeatmapSkinResources.cs

@@ -26,6 +26,7 @@ namespace osu.Game.Tests.Skins
         {
             var imported = beatmaps.Import(new ZipArchiveReader(TestResources.OpenResource("Archives/ogg-beatmap.osz"))).Result;
             beatmap = beatmaps.GetWorkingBeatmap(imported.Beatmaps[0]);
+            beatmap.LoadTrack();
         }
 
         [Test]

osu.Game.Tests/Visual/Collections/TestSceneManageCollectionsDialog.cs

@@ -0,0 +1,244 @@
+// 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;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Platform;
+using osu.Framework.Testing;
+using osu.Game.Beatmaps;
+using osu.Game.Collections;
+using osu.Game.Overlays;
+using osu.Game.Overlays.Dialog;
+using osu.Game.Rulesets;
+using osu.Game.Tests.Resources;
+using osuTK;
+using osuTK.Input;
+
+namespace osu.Game.Tests.Visual.Collections
+{
+    public class TestSceneManageCollectionsDialog : OsuManualInputManagerTestScene
+    {
+        protected override Container<Drawable> Content => content;
+
+        private readonly Container content;
+        private readonly DialogOverlay dialogOverlay;
+        private readonly CollectionManager manager;
+
+        private RulesetStore rulesets;
+        private BeatmapManager beatmapManager;
+
+        private ManageCollectionsDialog dialog;
+
+        public TestSceneManageCollectionsDialog()
+        {
+            base.Content.AddRange(new Drawable[]
+            {
+                manager = new CollectionManager(LocalStorage),
+                content = new Container { RelativeSizeAxes = Axes.Both },
+                dialogOverlay = new DialogOverlay()
+            });
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(GameHost host)
+        {
+            Dependencies.Cache(rulesets = new RulesetStore(ContextFactory));
+            Dependencies.Cache(beatmapManager = new BeatmapManager(LocalStorage, ContextFactory, rulesets, null, Audio, host, Beatmap.Default));
+
+            beatmapManager.Import(TestResources.GetTestBeatmapForImport()).Wait();
+        }
+
+        protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
+        {
+            var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
+            dependencies.Cache(manager);
+            dependencies.Cache(dialogOverlay);
+            return dependencies;
+        }
+
+        [SetUp]
+        public void SetUp() => Schedule(() =>
+        {
+            manager.Collections.Clear();
+            Child = dialog = new ManageCollectionsDialog();
+        });
+
+        [SetUpSteps]
+        public void SetUpSteps()
+        {
+            AddStep("show dialog", () => dialog.Show());
+        }
+
+        [Test]
+        public void TestHideDialog()
+        {
+            AddWaitStep("wait for animation", 3);
+            AddStep("hide dialog", () => dialog.Hide());
+        }
+
+        [Test]
+        public void TestLastItemIsPlaceholder()
+        {
+            AddAssert("last item is placeholder", () => !manager.Collections.Contains(dialog.ChildrenOfType<DrawableCollectionListItem>().Last().Model));
+        }
+
+        [Test]
+        public void TestAddCollectionExternal()
+        {
+            AddStep("add collection", () => manager.Collections.Add(new BeatmapCollection { Name = { Value = "First collection" } }));
+            assertCollectionCount(1);
+            assertCollectionName(0, "First collection");
+
+            AddStep("add another collection", () => manager.Collections.Add(new BeatmapCollection { Name = { Value = "Second collection" } }));
+            assertCollectionCount(2);
+            assertCollectionName(1, "Second collection");
+        }
+
+        [Test]
+        public void TestFocusPlaceholderDoesNotCreateCollection()
+        {
+            AddStep("focus placeholder", () =>
+            {
+                InputManager.MoveMouseTo(dialog.ChildrenOfType<DrawableCollectionListItem>().Last());
+                InputManager.Click(MouseButton.Left);
+            });
+
+            assertCollectionCount(0);
+        }
+
+        [Test]
+        public void TestAddCollectionViaPlaceholder()
+        {
+            DrawableCollectionListItem placeholderItem = null;
+
+            AddStep("focus placeholder", () =>
+            {
+                InputManager.MoveMouseTo(placeholderItem = dialog.ChildrenOfType<DrawableCollectionListItem>().Last());
+                InputManager.Click(MouseButton.Left);
+            });
+
+            // Done directly via the collection since InputManager methods cannot add text to textbox...
+            AddStep("change collection name", () => placeholderItem.Model.Name.Value = "a");
+            assertCollectionCount(1);
+            AddAssert("collection now exists", () => manager.Collections.Contains(placeholderItem.Model));
+
+            AddAssert("last item is placeholder", () => !manager.Collections.Contains(dialog.ChildrenOfType<DrawableCollectionListItem>().Last().Model));
+        }
+
+        [Test]
+        public void TestRemoveCollectionExternal()
+        {
+            AddStep("add two collections", () => manager.Collections.AddRange(new[]
+            {
+                new BeatmapCollection { Name = { Value = "1" } },
+                new BeatmapCollection { Name = { Value = "2" } },
+            }));
+
+            AddStep("remove first collection", () => manager.Collections.RemoveAt(0));
+            assertCollectionCount(1);
+            assertCollectionName(0, "2");
+        }
+
+        [Test]
+        public void TestRemoveCollectionViaButton()
+        {
+            AddStep("add two collections", () => manager.Collections.AddRange(new[]
+            {
+                new BeatmapCollection { Name = { Value = "1" } },
+                new BeatmapCollection { Name = { Value = "2" }, Beatmaps = { beatmapManager.GetAllUsableBeatmapSets().First().Beatmaps[0] } },
+            }));
+
+            assertCollectionCount(2);
+
+            AddStep("click first delete button", () =>
+            {
+                InputManager.MoveMouseTo(dialog.ChildrenOfType<DrawableCollectionListItem.DeleteButton>().First(), new Vector2(5, 0));
+                InputManager.Click(MouseButton.Left);
+            });
+
+            AddAssert("dialog not displayed", () => dialogOverlay.CurrentDialog == null);
+            assertCollectionCount(1);
+            assertCollectionName(0, "2");
+
+            AddStep("click first delete button", () =>
+            {
+                InputManager.MoveMouseTo(dialog.ChildrenOfType<DrawableCollectionListItem.DeleteButton>().First(), new Vector2(5, 0));
+                InputManager.Click(MouseButton.Left);
+            });
+
+            AddAssert("dialog displayed", () => dialogOverlay.CurrentDialog is DeleteCollectionDialog);
+            AddStep("click confirmation", () =>
+            {
+                InputManager.MoveMouseTo(dialogOverlay.CurrentDialog.ChildrenOfType<PopupDialogButton>().First());
+                InputManager.Click(MouseButton.Left);
+            });
+
+            assertCollectionCount(0);
+        }
+
+        [Test]
+        public void TestCollectionNotRemovedWhenDialogCancelled()
+        {
+            AddStep("add two collections", () => manager.Collections.AddRange(new[]
+            {
+                new BeatmapCollection { Name = { Value = "1" }, Beatmaps = { beatmapManager.GetAllUsableBeatmapSets().First().Beatmaps[0] } },
+            }));
+
+            assertCollectionCount(1);
+
+            AddStep("click first delete button", () =>
+            {
+                InputManager.MoveMouseTo(dialog.ChildrenOfType<DrawableCollectionListItem.DeleteButton>().First(), new Vector2(5, 0));
+                InputManager.Click(MouseButton.Left);
+            });
+
+            AddAssert("dialog displayed", () => dialogOverlay.CurrentDialog is DeleteCollectionDialog);
+            AddStep("click cancellation", () =>
+            {
+                InputManager.MoveMouseTo(dialogOverlay.CurrentDialog.ChildrenOfType<PopupDialogButton>().Last());
+                InputManager.Click(MouseButton.Left);
+            });
+
+            assertCollectionCount(1);
+        }
+
+        [Test]
+        public void TestCollectionRenamedExternal()
+        {
+            AddStep("add two collections", () => manager.Collections.AddRange(new[]
+            {
+                new BeatmapCollection { Name = { Value = "1" } },
+                new BeatmapCollection { Name = { Value = "2" } },
+            }));
+
+            AddStep("change first collection name", () => manager.Collections[0].Name.Value = "First");
+
+            assertCollectionName(0, "First");
+        }
+
+        [Test]
+        public void TestCollectionRenamedOnTextChange()
+        {
+            AddStep("add two collections", () => manager.Collections.AddRange(new[]
+            {
+                new BeatmapCollection { Name = { Value = "1" } },
+                new BeatmapCollection { Name = { Value = "2" } },
+            }));
+
+            assertCollectionCount(2);
+
+            AddStep("change first collection name", () => dialog.ChildrenOfType<TextBox>().First().Text = "First");
+            AddAssert("collection has new name", () => manager.Collections[0].Name.Value == "First");
+        }
+
+        private void assertCollectionCount(int count)
+            => AddUntilStep($"{count} collections shown", () => dialog.ChildrenOfType<DrawableCollectionListItem>().Count(i => i.IsCreated.Value) == count);
+
+        private void assertCollectionName(int index, string name)
+            => AddUntilStep($"item {index + 1} has correct name", () => dialog.ChildrenOfType<DrawableCollectionListItem>().ElementAt(index).ChildrenOfType<TextBox>().First().Text == name);
+    }
+}

osu.Game.Tests/Visual/Editing/TestSceneEditorChangeStates.cs

@@ -1,28 +1,27 @@
 // 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.Testing;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Screens.Edit;
 
 namespace osu.Game.Tests.Visual.Editing
 {
     public class TestSceneEditorChangeStates : EditorTestScene
     {
-        private EditorBeatmap editorBeatmap;
-
         protected override Ruleset CreateEditorRuleset() => new OsuRuleset();
 
-        public override void SetUpSteps()
+        [Test]
+        public void TestSelectedObjects()
         {
-            base.SetUpSteps();
-
-            AddStep("get beatmap", () => editorBeatmap = Editor.ChildrenOfType<EditorBeatmap>().Single());
+            HitCircle obj = null;
+            AddStep("add hitobject", () => EditorBeatmap.Add(obj = new HitCircle { StartTime = 1000 }));
+            AddStep("select hitobject", () => EditorBeatmap.SelectedHitObjects.Add(obj));
+            AddAssert("confirm 1 selected", () => EditorBeatmap.SelectedHitObjects.Count == 1);
+            AddStep("deselect hitobject", () => EditorBeatmap.SelectedHitObjects.Remove(obj));
+            AddAssert("confirm 0 selected", () => EditorBeatmap.SelectedHitObjects.Count == 0);
         }
 
         [Test]
@@ -30,11 +29,12 @@ namespace osu.Game.Tests.Visual.Editing
         {
             int hitObjectCount = 0;
 
-            AddStep("get initial state", () => hitObjectCount = editorBeatmap.HitObjects.Count);
+            AddStep("get initial state", () => hitObjectCount = EditorBeatmap.HitObjects.Count);
 
             addUndoSteps();
 
-            AddAssert("no change occurred", () => hitObjectCount == editorBeatmap.HitObjects.Count);
+            AddAssert("no change occurred", () => hitObjectCount == EditorBeatmap.HitObjects.Count);
+            AddAssert("no unsaved changes", () => !Editor.HasUnsavedChanges);
         }
 
         [Test]
@@ -42,11 +42,12 @@ namespace osu.Game.Tests.Visual.Editing
         {
             int hitObjectCount = 0;
 
-            AddStep("get initial state", () => hitObjectCount = editorBeatmap.HitObjects.Count);
+            AddStep("get initial state", () => hitObjectCount = EditorBeatmap.HitObjects.Count);
 
             addRedoSteps();
 
-            AddAssert("no change occurred", () => hitObjectCount == editorBeatmap.HitObjects.Count);
+            AddAssert("no change occurred", () => hitObjectCount == EditorBeatmap.HitObjects.Count);
+            AddAssert("no unsaved changes", () => !Editor.HasUnsavedChanges);
         }
 
         [Test]
@@ -58,15 +59,17 @@ namespace osu.Game.Tests.Visual.Editing
 
             AddStep("bind removal", () =>
             {
-                editorBeatmap.HitObjectAdded += h => addedObject = h;
-                editorBeatmap.HitObjectRemoved += h => removedObject = h;
+                EditorBeatmap.HitObjectAdded += h => addedObject = h;
+                EditorBeatmap.HitObjectRemoved += h => removedObject = h;
             });
 
-            AddStep("add hitobject", () => editorBeatmap.Add(expectedObject = new HitCircle { StartTime = 1000 }));
+            AddStep("add hitobject", () => EditorBeatmap.Add(expectedObject = new HitCircle { StartTime = 1000 }));
             AddAssert("hitobject added", () => addedObject == expectedObject);
+            AddAssert("unsaved changes", () => Editor.HasUnsavedChanges);
 
             addUndoSteps();
             AddAssert("hitobject removed", () => removedObject == expectedObject);
+            AddAssert("no unsaved changes", () => !Editor.HasUnsavedChanges);
         }
 
         [Test]
@@ -78,11 +81,11 @@ namespace osu.Game.Tests.Visual.Editing
 
             AddStep("bind removal", () =>
             {
-                editorBeatmap.HitObjectAdded += h => addedObject = h;
-                editorBeatmap.HitObjectRemoved += h => removedObject = h;
+                EditorBeatmap.HitObjectAdded += h => addedObject = h;
+                EditorBeatmap.HitObjectRemoved += h => removedObject = h;
             });
 
-            AddStep("add hitobject", () => editorBeatmap.Add(expectedObject = new HitCircle { StartTime = 1000 }));
+            AddStep("add hitobject", () => EditorBeatmap.Add(expectedObject = new HitCircle { StartTime = 1000 }));
             addUndoSteps();
 
             AddStep("reset variables", () =>
@@ -94,6 +97,17 @@ namespace osu.Game.Tests.Visual.Editing
             addRedoSteps();
             AddAssert("hitobject added", () => addedObject.StartTime == expectedObject.StartTime); // Can't compare via equality (new hitobject instance)
             AddAssert("no hitobject removed", () => removedObject == null);
+            AddAssert("unsaved changes", () => Editor.HasUnsavedChanges);
+        }
+
+        [Test]
+        public void TestAddObjectThenSaveHasNoUnsavedChanges()
+        {
+            AddStep("add hitobject", () => EditorBeatmap.Add(new HitCircle { StartTime = 1000 }));
+
+            AddAssert("unsaved changes", () => Editor.HasUnsavedChanges);
+            AddStep("save changes", () => Editor.Save());
+            AddAssert("no unsaved changes", () => !Editor.HasUnsavedChanges);
         }
 
         [Test]
@@ -105,12 +119,12 @@ namespace osu.Game.Tests.Visual.Editing
 
             AddStep("bind removal", () =>
             {
-                editorBeatmap.HitObjectAdded += h => addedObject = h;
-                editorBeatmap.HitObjectRemoved += h => removedObject = h;
+                EditorBeatmap.HitObjectAdded += h => addedObject = h;
+                EditorBeatmap.HitObjectRemoved += h => removedObject = h;
             });
 
-            AddStep("add hitobject", () => editorBeatmap.Add(expectedObject = new HitCircle { StartTime = 1000 }));
-            AddStep("remove object", () => editorBeatmap.Remove(expectedObject));
+            AddStep("add hitobject", () => EditorBeatmap.Add(expectedObject = new HitCircle { StartTime = 1000 }));
+            AddStep("remove object", () => EditorBeatmap.Remove(expectedObject));
             AddStep("reset variables", () =>
             {
                 addedObject = null;
@@ -120,6 +134,7 @@ namespace osu.Game.Tests.Visual.Editing
             addUndoSteps();
             AddAssert("hitobject added", () => addedObject.StartTime == expectedObject.StartTime); // Can't compare via equality (new hitobject instance)
             AddAssert("no hitobject removed", () => removedObject == null);
+            AddAssert("unsaved changes", () => Editor.HasUnsavedChanges); // 2 steps performed, 1 undone
         }
 
         [Test]
@@ -131,12 +146,12 @@ namespace osu.Game.Tests.Visual.Editing
 
             AddStep("bind removal", () =>
             {
-                editorBeatmap.HitObjectAdded += h => addedObject = h;
-                editorBeatmap.HitObjectRemoved += h => removedObject = h;
+                EditorBeatmap.HitObjectAdded += h => addedObject = h;
+                EditorBeatmap.HitObjectRemoved += h => removedObject = h;
             });
 
-            AddStep("add hitobject", () => editorBeatmap.Add(expectedObject = new HitCircle { StartTime = 1000 }));
-            AddStep("remove object", () => editorBeatmap.Remove(expectedObject));
+            AddStep("add hitobject", () => EditorBeatmap.Add(expectedObject = new HitCircle { StartTime = 1000 }));
+            AddStep("remove object", () => EditorBeatmap.Remove(expectedObject));
             addUndoSteps();
 
             AddStep("reset variables", () =>
@@ -148,19 +163,11 @@ namespace osu.Game.Tests.Visual.Editing
             addRedoSteps();
             AddAssert("hitobject removed", () => removedObject.StartTime == expectedObject.StartTime); // Can't compare via equality (new hitobject instance after undo)
             AddAssert("no hitobject added", () => addedObject == null);
+            AddAssert("no changes", () => !Editor.HasUnsavedChanges); // end result is empty beatmap, matching original state
         }
 
-        private void addUndoSteps() => AddStep("undo", () => ((TestEditor)Editor).Undo());
+        private void addUndoSteps() => AddStep("undo", () => Editor.Undo());
 
-        private void addRedoSteps() => AddStep("redo", () => ((TestEditor)Editor).Redo());
-
-        protected override Editor CreateEditor() => new TestEditor();
-
-        private class TestEditor : Editor
-        {
-            public new void Undo() => base.Undo();
-
-            public new void Redo() => base.Redo();
-        }
+        private void addRedoSteps() => AddStep("redo", () => Editor.Redo());
     }
 }

osu.Game.Tests/Visual/Editing/TestSceneEditorClipboard.cs

@@ -0,0 +1,154 @@
+// 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.Game.Beatmaps;
+using osu.Game.Rulesets;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Tests.Beatmaps;
+using osuTK;
+
+namespace osu.Game.Tests.Visual.Editing
+{
+    public class TestSceneEditorClipboard : EditorTestScene
+    {
+        protected override Ruleset CreateEditorRuleset() => new OsuRuleset();
+
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new TestBeatmap(ruleset, false);
+
+        [Test]
+        public void TestCutRemovesObjects()
+        {
+            var addedObject = new HitCircle { StartTime = 1000 };
+
+            AddStep("add hitobject", () => EditorBeatmap.Add(addedObject));
+
+            AddStep("select added object", () => EditorBeatmap.SelectedHitObjects.Add(addedObject));
+
+            AddStep("cut hitobject", () => Editor.Cut());
+
+            AddAssert("no hitobjects in beatmap", () => EditorBeatmap.HitObjects.Count == 0);
+        }
+
+        [TestCase(1000)]
+        [TestCase(2000)]
+        public void TestCutPaste(double newTime)
+        {
+            var addedObject = new HitCircle { StartTime = 1000 };
+
+            AddStep("add hitobject", () => EditorBeatmap.Add(addedObject));
+
+            AddStep("select added object", () => EditorBeatmap.SelectedHitObjects.Add(addedObject));
+
+            AddStep("cut hitobject", () => Editor.Cut());
+
+            AddStep("move forward in time", () => EditorClock.Seek(newTime));
+
+            AddStep("paste hitobject", () => Editor.Paste());
+
+            AddAssert("is one object", () => EditorBeatmap.HitObjects.Count == 1);
+
+            AddAssert("new object selected", () => EditorBeatmap.SelectedHitObjects.Single().StartTime == newTime);
+        }
+
+        [Test]
+        public void TestCutPasteSlider()
+        {
+            var addedObject = new Slider
+            {
+                StartTime = 1000,
+                Path = new SliderPath
+                {
+                    ControlPoints =
+                    {
+                        new PathControlPoint(),
+                        new PathControlPoint(new Vector2(100, 0), PathType.Bezier)
+                    }
+                }
+            };
+
+            AddStep("add hitobject", () => EditorBeatmap.Add(addedObject));
+
+            AddStep("select added object", () => EditorBeatmap.SelectedHitObjects.Add(addedObject));
+
+            AddStep("cut hitobject", () => Editor.Cut());
+
+            AddStep("paste hitobject", () => Editor.Paste());
+
+            AddAssert("is one object", () => EditorBeatmap.HitObjects.Count == 1);
+
+            AddAssert("path matches", () =>
+            {
+                var path = ((Slider)EditorBeatmap.HitObjects.Single()).Path;
+                return path.ControlPoints.Count == 2 && path.ControlPoints.SequenceEqual(addedObject.Path.ControlPoints);
+            });
+        }
+
+        [Test]
+        public void TestCutPasteSpinner()
+        {
+            var addedObject = new Spinner
+            {
+                StartTime = 1000,
+                Duration = 5000
+            };
+
+            AddStep("add hitobject", () => EditorBeatmap.Add(addedObject));
+
+            AddStep("select added object", () => EditorBeatmap.SelectedHitObjects.Add(addedObject));
+
+            AddStep("cut hitobject", () => Editor.Cut());
+
+            AddStep("paste hitobject", () => Editor.Paste());
+
+            AddAssert("is one object", () => EditorBeatmap.HitObjects.Count == 1);
+
+            AddAssert("duration matches", () => ((Spinner)EditorBeatmap.HitObjects.Single()).Duration == 5000);
+        }
+
+        [Test]
+        public void TestCopyPaste()
+        {
+            var addedObject = new HitCircle { StartTime = 1000 };
+
+            AddStep("add hitobject", () => EditorBeatmap.Add(addedObject));
+
+            AddStep("select added object", () => EditorBeatmap.SelectedHitObjects.Add(addedObject));
+
+            AddStep("copy hitobject", () => Editor.Copy());
+
+            AddStep("move forward in time", () => EditorClock.Seek(2000));
+
+            AddStep("paste hitobject", () => Editor.Paste());
+
+            AddAssert("are two objects", () => EditorBeatmap.HitObjects.Count == 2);
+
+            AddAssert("new object selected", () => EditorBeatmap.SelectedHitObjects.Single().StartTime == 2000);
+        }
+
+        [Test]
+        public void TestCutNothing()
+        {
+            AddStep("cut hitobject", () => Editor.Cut());
+            AddAssert("are no objects", () => EditorBeatmap.HitObjects.Count == 0);
+        }
+
+        [Test]
+        public void TestCopyNothing()
+        {
+            AddStep("copy hitobject", () => Editor.Copy());
+            AddAssert("are no objects", () => EditorBeatmap.HitObjects.Count == 0);
+        }
+
+        [Test]
+        public void TestPasteNothing()
+        {
+            AddStep("paste hitobject", () => Editor.Paste());
+            AddAssert("are no objects", () => EditorBeatmap.HitObjects.Count == 0);
+        }
+    }
+}

osu.Game.Tests/Visual/Editing/TestSceneEditorComposeRadioButtons.cs

@@ -3,6 +3,7 @@
 
 using NUnit.Framework;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Sprites;
 using osu.Game.Screens.Edit.Components.RadioButtons;
 
 namespace osu.Game.Tests.Visual.Editing
@@ -22,7 +23,7 @@ namespace osu.Game.Tests.Visual.Editing
                 {
                     new RadioButton("Item 1", () => { }),
                     new RadioButton("Item 2", () => { }),
-                    new RadioButton("Item 3", () => { }),
+                    new RadioButton("Item 3", () => { }, () => new SpriteIcon { Icon = FontAwesome.Regular.Angry }),
                     new RadioButton("Item 4", () => { }),
                     new RadioButton("Item 5", () => { })
                 }

osu.Game.Tests/Visual/Editing/TestSceneSetupScreen.cs

@@ -0,0 +1,32 @@
+// 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 NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Beatmaps;
+using osu.Game.Screens.Edit;
+using osu.Game.Screens.Edit.Setup;
+
+namespace osu.Game.Tests.Visual.Editing
+{
+    [TestFixture]
+    public class TestSceneSetupScreen : EditorClockTestScene
+    {
+        [Cached(typeof(EditorBeatmap))]
+        [Cached(typeof(IBeatSnapProvider))]
+        private readonly EditorBeatmap editorBeatmap;
+
+        public TestSceneSetupScreen()
+        {
+            editorBeatmap = new EditorBeatmap(new OsuBeatmap());
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Beatmap.Value = CreateWorkingBeatmap(editorBeatmap.PlayableBeatmap);
+            Child = new SetupScreen();
+        }
+    }
+}

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

@@ -4,7 +4,6 @@
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Audio;
-using osu.Framework.Audio.Track;
 using osu.Framework.Screens;
 using osu.Framework.Testing;
 using osu.Framework.Timing;
@@ -18,8 +17,6 @@ namespace osu.Game.Tests.Visual.Gameplay
 {
     public class TestSceneCompletionCancellation : OsuPlayerTestScene
     {
-        private Track track;
-
         [Resolved]
         private AudioManager audio { get; set; }
 
@@ -34,7 +31,7 @@ namespace osu.Game.Tests.Visual.Gameplay
             base.SetUpSteps();
 
             // Ensure track has actually running before attempting to seek
-            AddUntilStep("wait for track to start running", () => track.IsRunning);
+            AddUntilStep("wait for track to start running", () => Beatmap.Value.Track.IsRunning);
         }
 
         [Test]
@@ -73,13 +70,13 @@ namespace osu.Game.Tests.Visual.Gameplay
 
         private void complete()
         {
-            AddStep("seek to completion", () => track.Seek(5000));
+            AddStep("seek to completion", () => Beatmap.Value.Track.Seek(5000));
             AddUntilStep("completion set by processor", () => Player.ScoreProcessor.HasCompleted.Value);
         }
 
         private void cancel()
         {
-            AddStep("rewind to cancel", () => track.Seek(4000));
+            AddStep("rewind to cancel", () => Beatmap.Value.Track.Seek(4000));
             AddUntilStep("completion cleared by processor", () => !Player.ScoreProcessor.HasCompleted.Value);
         }
 
@@ -91,11 +88,7 @@ namespace osu.Game.Tests.Visual.Gameplay
         }
 
         protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap, Storyboard storyboard = null)
-        {
-            var working = new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audio);
-            track = working.Track;
-            return working;
-        }
+            => new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audio);
 
         protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
         {

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

@@ -5,7 +5,6 @@ using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Audio;
-using osu.Framework.Audio.Track;
 using osu.Framework.Utils;
 using osu.Framework.Timing;
 using osu.Game.Beatmaps;
@@ -21,19 +20,13 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Resolved]
         private AudioManager audioManager { get; set; }
 
-        private Track track;
-
-        protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap, Storyboard storyboard = null)
-        {
-            var working = new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
-            track = working.Track;
-            return working;
-        }
+        protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap, Storyboard storyboard = null) =>
+            new ClockBackedTestWorkingBeatmap(beatmap, storyboard, new FramedClock(new ManualClock { Rate = 1 }), audioManager);
 
         [Test]
         public void TestNoJudgementsOnRewind()
         {
-            AddUntilStep("wait for track to start running", () => track.IsRunning);
+            AddUntilStep("wait for track to start running", () => Beatmap.Value.Track.IsRunning);
             addSeekStep(3000);
             AddAssert("all judged", () => Player.DrawableRuleset.Playfield.AllHitObjects.All(h => h.Judged));
             AddUntilStep("key counter counted keys", () => Player.HUDOverlay.KeyCounter.Children.All(kc => kc.CountPresses >= 7));
@@ -46,7 +39,7 @@ namespace osu.Game.Tests.Visual.Gameplay
 
         private void addSeekStep(double time)
         {
-            AddStep($"seek to {time}", () => track.Seek(time));
+            AddStep($"seek to {time}", () => Beatmap.Value.Track.Seek(time));
 
             // Allow a few frames of lenience
             AddUntilStep("wait for seek to finish", () => Precision.AlmostEquals(time, Player.DrawableRuleset.FrameStableClock.CurrentTime, 100));

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

@@ -0,0 +1,54 @@
+// 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.Game.Overlays;
+using osu.Game.Rulesets;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    public class TestSceneOverlayActivation : OsuPlayerTestScene
+    {
+        protected new OverlayTestPlayer Player => base.Player as OverlayTestPlayer;
+
+        [Test]
+        public void TestGameplayOverlayActivation()
+        {
+            AddAssert("activation mode is disabled", () => Player.OverlayActivationMode == OverlayActivation.Disabled);
+        }
+
+        [Test]
+        public void TestGameplayOverlayActivationPaused()
+        {
+            AddUntilStep("activation mode is disabled", () => Player.OverlayActivationMode == OverlayActivation.Disabled);
+            AddStep("pause gameplay", () => Player.Pause());
+            AddUntilStep("activation mode is user triggered", () => Player.OverlayActivationMode == OverlayActivation.UserTriggered);
+        }
+
+        [Test]
+        public void TestGameplayOverlayActivationReplayLoaded()
+        {
+            AddAssert("activation mode is disabled", () => Player.OverlayActivationMode == OverlayActivation.Disabled);
+            AddStep("load a replay", () => Player.DrawableRuleset.HasReplayLoaded.Value = true);
+            AddAssert("activation mode is user triggered", () => Player.OverlayActivationMode == OverlayActivation.UserTriggered);
+        }
+
+        [Test]
+        public void TestGameplayOverlayActivationBreaks()
+        {
+            AddAssert("activation mode is disabled", () => Player.OverlayActivationMode == OverlayActivation.Disabled);
+            AddStep("seek to break", () => Player.GameplayClockContainer.Seek(Beatmap.Value.Beatmap.Breaks.First().StartTime));
+            AddUntilStep("activation mode is user triggered", () => Player.OverlayActivationMode == OverlayActivation.UserTriggered);
+            AddStep("seek to break end", () => Player.GameplayClockContainer.Seek(Beatmap.Value.Beatmap.Breaks.First().EndTime));
+            AddUntilStep("activation mode is disabled", () => Player.OverlayActivationMode == OverlayActivation.Disabled);
+        }
+
+        protected override TestPlayer CreatePlayer(Ruleset ruleset) => new OverlayTestPlayer();
+
+        protected class OverlayTestPlayer : TestPlayer
+        {
+            public new OverlayActivation OverlayActivationMode => base.OverlayActivationMode.Value;
+        }
+    }
+}

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

@@ -48,7 +48,10 @@ namespace osu.Game.Tests.Visual.Gameplay
 
         private class ExampleContainer : PlayerSettingsGroup
         {
-            protected override string Title => @"example";
+            public ExampleContainer()
+                : base("example")
+            {
+            }
         }
     }
 }

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

@@ -1,11 +1,9 @@
 // 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.Graphics;
 using osu.Framework.Graphics.Containers;
-using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.Play;
 using osuTK;
@@ -32,7 +30,10 @@ namespace osu.Game.Tests.Visual.Gameplay
             requestCount = 0;
             increment = skip_time;
 
-            Child = gameplayClockContainer = new GameplayClockContainer(CreateWorkingBeatmap(CreateBeatmap(new OsuRuleset().RulesetInfo)), Array.Empty<Mod>(), 0)
+            var working = CreateWorkingBeatmap(CreateBeatmap(new OsuRuleset().RulesetInfo));
+            working.LoadTrack();
+
+            Child = gameplayClockContainer = new GameplayClockContainer(working, 0)
             {
                 RelativeSizeAxes = Axes.Both,
                 Children = new Drawable[]

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

@@ -22,19 +22,32 @@ namespace osu.Game.Tests.Visual.Gameplay
     [TestFixture]
     public class TestSceneStoryboard : OsuTestScene
     {
-        private readonly Container<DrawableStoryboard> storyboardContainer;
+        private Container<DrawableStoryboard> storyboardContainer;
         private DrawableStoryboard storyboard;
 
-        [Cached]
-        private MusicController musicController = new MusicController();
+        [Test]
+        public void TestStoryboard()
+        {
+            AddStep("Restart", restart);
+            AddToggleStep("Passing", passing =>
+            {
+                if (storyboard != null) storyboard.Passing = passing;
+            });
+        }
 
-        public TestSceneStoryboard()
+        [Test]
+        public void TestStoryboardMissingVideo()
+        {
+            AddStep("Load storyboard with missing video", loadStoryboardNoVideo);
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
         {
             Clock = new FramedClock();
 
             AddRange(new Drawable[]
             {
-                musicController,
                 new Container
                 {
                     RelativeSizeAxes = Axes.Both,
@@ -58,32 +71,11 @@ namespace osu.Game.Tests.Visual.Gameplay
                     State = { Value = Visibility.Visible },
                 }
             });
+
+            Beatmap.BindValueChanged(beatmapChanged, true);
         }
 
-        [Test]
-        public void TestStoryboard()
-        {
-            AddStep("Restart", restart);
-            AddToggleStep("Passing", passing =>
-            {
-                if (storyboard != null) storyboard.Passing = passing;
-            });
-        }
-
-        [Test]
-        public void TestStoryboardMissingVideo()
-        {
-            AddStep("Load storyboard with missing video", loadStoryboardNoVideo);
-        }
-
-        [BackgroundDependencyLoader]
-        private void load()
-        {
-            Beatmap.ValueChanged += beatmapChanged;
-        }
-
-        private void beatmapChanged(ValueChangedEvent<WorkingBeatmap> e)
-            => loadStoryboard(e.NewValue);
+        private void beatmapChanged(ValueChangedEvent<WorkingBeatmap> e) => loadStoryboard(e.NewValue);
 
         private void restart()
         {

osu.Game.Tests/Visual/Menus/TestSceneIntroWelcome.cs

@@ -2,8 +2,8 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using NUnit.Framework;
-using osu.Framework.Audio.Track;
 using osu.Framework.Screens;
+using osu.Framework.Utils;
 using osu.Game.Screens.Menu;
 
 namespace osu.Game.Tests.Visual.Menus
@@ -15,11 +15,9 @@ namespace osu.Game.Tests.Visual.Menus
 
         public TestSceneIntroWelcome()
         {
-            AddUntilStep("wait for load", () => getTrack() != null);
-
-            AddAssert("check if menu music loops", () => getTrack().Looping);
+            AddUntilStep("wait for load", () => MusicController.TrackLoaded);
+            AddAssert("correct track", () => Precision.AlmostEquals(MusicController.CurrentTrack.Length, 48000, 1));
+            AddAssert("check if menu music loops", () => MusicController.CurrentTrack.Looping);
         }
-
-        private Track getTrack() => (IntroStack?.CurrentScreen as MainMenu)?.Track;
     }
 }

osu.Game.Tests/Visual/Menus/TestSceneMusicActionHandling.cs

@@ -0,0 +1,83 @@
+// 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.Framework.Testing;
+using osu.Game.Beatmaps;
+using osu.Game.Input.Bindings;
+using osu.Game.Overlays;
+using osu.Game.Tests.Resources;
+using osu.Game.Tests.Visual.Navigation;
+
+namespace osu.Game.Tests.Visual.Menus
+{
+    public class TestSceneMusicActionHandling : OsuGameTestScene
+    {
+        private GlobalActionContainer globalActionContainer => Game.ChildrenOfType<GlobalActionContainer>().First();
+
+        [Test]
+        public void TestMusicPlayAction()
+        {
+            AddStep("ensure playing something", () => Game.MusicController.EnsurePlayingSomething());
+            AddStep("toggle playback", () => globalActionContainer.TriggerPressed(GlobalAction.MusicPlay));
+            AddAssert("music paused", () => !Game.MusicController.IsPlaying && Game.MusicController.IsUserPaused);
+            AddStep("toggle playback", () => globalActionContainer.TriggerPressed(GlobalAction.MusicPlay));
+            AddAssert("music resumed", () => Game.MusicController.IsPlaying && !Game.MusicController.IsUserPaused);
+        }
+
+        [Test]
+        public void TestMusicNavigationActions()
+        {
+            int importId = 0;
+            Queue<(WorkingBeatmap working, TrackChangeDirection changeDirection)> trackChangeQueue = null;
+
+            // ensure we have at least two beatmaps available to identify the direction the music controller navigated to.
+            AddRepeatStep("import beatmap", () => Game.BeatmapManager.Import(new BeatmapSetInfo
+            {
+                Beatmaps = new List<BeatmapInfo>
+                {
+                    new BeatmapInfo
+                    {
+                        BaseDifficulty = new BeatmapDifficulty(),
+                    }
+                },
+                Metadata = new BeatmapMetadata
+                {
+                    Artist = $"a test map {importId++}",
+                    Title = "title",
+                }
+            }).Wait(), 5);
+
+            AddStep("import beatmap with track", () =>
+            {
+                var setWithTrack = Game.BeatmapManager.Import(TestResources.GetTestBeatmapForImport()).Result;
+                Beatmap.Value = Game.BeatmapManager.GetWorkingBeatmap(setWithTrack.Beatmaps.First());
+            });
+
+            AddStep("bind to track change", () =>
+            {
+                trackChangeQueue = new Queue<(WorkingBeatmap, TrackChangeDirection)>();
+                Game.MusicController.TrackChanged += (working, changeDirection) => trackChangeQueue.Enqueue((working, changeDirection));
+            });
+
+            AddStep("seek track to 6 second", () => Game.MusicController.SeekTo(6000));
+            AddUntilStep("wait for current time to update", () => Game.MusicController.CurrentTrack.CurrentTime > 5000);
+
+            AddStep("press previous", () => globalActionContainer.TriggerPressed(GlobalAction.MusicPrev));
+            AddAssert("no track change", () => trackChangeQueue.Count == 0);
+            AddUntilStep("track restarted", () => Game.MusicController.CurrentTrack.CurrentTime < 5000);
+
+            AddStep("press previous", () => globalActionContainer.TriggerPressed(GlobalAction.MusicPrev));
+            AddAssert("track changed to previous", () =>
+                trackChangeQueue.Count == 1 &&
+                trackChangeQueue.Dequeue().changeDirection == TrackChangeDirection.Prev);
+
+            AddStep("press next", () => globalActionContainer.TriggerPressed(GlobalAction.MusicNext));
+            AddAssert("track changed to next", () =>
+                trackChangeQueue.Count == 1 &&
+                trackChangeQueue.Dequeue().changeDirection == TrackChangeDirection.Next);
+        }
+    }
+}

osu.Game.Tests/Visual/Menus/TestSceneSongTicker.cs

@@ -1,7 +1,6 @@
 // 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.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Overlays;
@@ -11,14 +10,10 @@ namespace osu.Game.Tests.Visual.Menus
 {
     public class TestSceneSongTicker : OsuTestScene
     {
-        [Cached]
-        private MusicController musicController = new MusicController();
-
         public TestSceneSongTicker()
         {
             AddRange(new Drawable[]
             {
-                musicController,
                 new SongTicker
                 {
                     Anchor = Anchor.Centre,

osu.Game.Tests/Visual/Menus/TestSceneToolbar.cs

@@ -91,7 +91,7 @@ namespace osu.Game.Tests.Visual.Menus
 
         public class TestToolbar : Toolbar
         {
-            public new Bindable<OverlayActivation> OverlayActivationMode => base.OverlayActivationMode;
+            public new Bindable<OverlayActivation> OverlayActivationMode => base.OverlayActivationMode as Bindable<OverlayActivation>;
         }
     }
 }

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

@@ -162,6 +162,28 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddAssert("item 2 has rate 2", () => Precision.AlmostEquals(2, ((OsuModDoubleTime)Room.Playlist.Last().RequiredMods[0]).SpeedChange.Value));
         }
 
+        /// <summary>
+        /// Tests that the global mod instances are not retained by the rooms, as global mod instances are retained and re-used by the mod select overlay.
+        /// </summary>
+        [Test]
+        public void TestGlobalModInstancesNotRetained()
+        {
+            OsuModDoubleTime mod = null;
+
+            AddStep("set dt mod and store", () =>
+            {
+                SelectedMods.Value = new[] { new OsuModDoubleTime() };
+
+                // Mod select overlay replaces our mod.
+                mod = (OsuModDoubleTime)SelectedMods.Value[0];
+            });
+
+            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));
+        }
+
         private class TestMatchSongSelect : MatchSongSelect
         {
             public new MatchBeatmapDetailArea BeatmapDetails => (MatchBeatmapDetailArea)base.BeatmapDetails;

osu.Game.Tests/Visual/Navigation/TestScenePresentScore.cs

@@ -12,6 +12,7 @@ using osu.Game.Rulesets;
 using osu.Game.Rulesets.Mania;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Scoring;
+using osu.Game.Screens;
 using osu.Game.Screens.Menu;
 using osu.Game.Screens.Play;
 using osu.Game.Screens.Ranking;
@@ -132,6 +133,12 @@ namespace osu.Game.Tests.Visual.Navigation
             return () => imported;
         }
 
+        /// <summary>
+        /// Some tests test waiting for a particular screen twice in a row, but expect a new instance each time.
+        /// There's a case where they may succeed incorrectly if we don't compare against the previous instance.
+        /// </summary>
+        private IScreen lastWaitedScreen;
+
         private void presentAndConfirm(Func<ScoreInfo> getImport, ScorePresentType type)
         {
             AddStep("present score", () => Game.PresentScore(getImport(), type));
@@ -139,13 +146,15 @@ namespace osu.Game.Tests.Visual.Navigation
             switch (type)
             {
                 case ScorePresentType.Results:
-                    AddUntilStep("wait for results", () => Game.ScreenStack.CurrentScreen is ResultsScreen);
+                    AddUntilStep("wait for results", () => lastWaitedScreen != Game.ScreenStack.CurrentScreen && Game.ScreenStack.CurrentScreen is ResultsScreen);
+                    AddStep("store last waited screen", () => lastWaitedScreen = Game.ScreenStack.CurrentScreen);
                     AddUntilStep("correct score displayed", () => ((ResultsScreen)Game.ScreenStack.CurrentScreen).Score.ID == getImport().ID);
                     AddAssert("correct ruleset selected", () => Game.Ruleset.Value.ID == getImport().Ruleset.ID);
                     break;
 
                 case ScorePresentType.Gameplay:
-                    AddUntilStep("wait for player loader", () => Game.ScreenStack.CurrentScreen is ReplayPlayerLoader);
+                    AddUntilStep("wait for player loader", () => lastWaitedScreen != Game.ScreenStack.CurrentScreen && Game.ScreenStack.CurrentScreen is ReplayPlayerLoader);
+                    AddStep("store last waited screen", () => lastWaitedScreen = Game.ScreenStack.CurrentScreen);
                     AddUntilStep("correct score displayed", () => ((ReplayPlayerLoader)Game.ScreenStack.CurrentScreen).Score.ID == getImport().ID);
                     AddAssert("correct ruleset selected", () => Game.Ruleset.Value.ID == getImport().Ruleset.ID);
                     break;

osu.Game.Tests/Visual/Navigation/TestSceneScreenNavigation.cs

@@ -4,14 +4,16 @@
 using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
-using osu.Framework.Audio.Track;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Screens;
+using osu.Framework.Testing;
 using osu.Game.Beatmaps;
 using osu.Game.Overlays;
 using osu.Game.Overlays.Mods;
+using osu.Game.Overlays.Toolbar;
 using osu.Game.Screens.Play;
 using osu.Game.Screens.Select;
+using osu.Game.Screens.Select.Options;
 using osu.Game.Tests.Beatmaps.IO;
 using osuTK;
 using osuTK.Input;
@@ -46,7 +48,6 @@ namespace osu.Game.Tests.Visual.Navigation
             Player player = null;
 
             WorkingBeatmap beatmap() => Game.Beatmap.Value;
-            Track track() => beatmap().Track;
 
             PushAndConfirm(() => new TestSongSelect());
 
@@ -62,30 +63,27 @@ namespace osu.Game.Tests.Visual.Navigation
             AddUntilStep("wait for player", () => (player = Game.ScreenStack.CurrentScreen as Player) != null);
             AddUntilStep("wait for fail", () => player.HasFailed);
 
-            AddUntilStep("wait for track stop", () => !track().IsRunning);
-            AddAssert("Ensure time before preview point", () => track().CurrentTime < beatmap().Metadata.PreviewTime);
+            AddUntilStep("wait for track stop", () => !Game.MusicController.IsPlaying);
+            AddAssert("Ensure time before preview point", () => Game.MusicController.CurrentTrack.CurrentTime < beatmap().Metadata.PreviewTime);
 
             pushEscape();
 
-            AddUntilStep("wait for track playing", () => track().IsRunning);
-            AddAssert("Ensure time wasn't reset to preview point", () => track().CurrentTime < beatmap().Metadata.PreviewTime);
+            AddUntilStep("wait for track playing", () => Game.MusicController.IsPlaying);
+            AddAssert("Ensure time wasn't reset to preview point", () => Game.MusicController.CurrentTrack.CurrentTime < beatmap().Metadata.PreviewTime);
         }
 
         [Test]
         public void TestMenuMakesMusic()
         {
-            WorkingBeatmap beatmap() => Game.Beatmap.Value;
-            Track track() => beatmap().Track;
-
             TestSongSelect songSelect = null;
 
             PushAndConfirm(() => songSelect = new TestSongSelect());
 
-            AddUntilStep("wait for no track", () => track() is TrackVirtual);
+            AddUntilStep("wait for no track", () => Game.MusicController.CurrentTrack.IsDummyDevice);
 
             AddStep("return to menu", () => songSelect.Exit());
 
-            AddUntilStep("wait for track", () => !(track() is TrackVirtual) && track().IsRunning);
+            AddUntilStep("wait for track", () => !Game.MusicController.CurrentTrack.IsDummyDevice && Game.MusicController.IsPlaying);
         }
 
         [Test]
@@ -140,12 +138,58 @@ namespace osu.Game.Tests.Visual.Navigation
             AddUntilStep("Wait for music controller", () => Game.MusicController.IsLoaded);
             AddStep("Seek close to end", () =>
             {
-                Game.MusicController.SeekTo(Game.Beatmap.Value.Track.Length - 1000);
-                Game.Beatmap.Value.Track.Completed += () => trackCompleted = true;
+                Game.MusicController.SeekTo(Game.MusicController.CurrentTrack.Length - 1000);
+                Game.MusicController.CurrentTrack.Completed += () => trackCompleted = true;
             });
 
             AddUntilStep("Track was completed", () => trackCompleted);
-            AddUntilStep("Track was restarted", () => Game.Beatmap.Value.Track.IsRunning);
+            AddUntilStep("Track was restarted", () => Game.MusicController.IsPlaying);
+        }
+
+        [Test]
+        public void TestModSelectInput()
+        {
+            TestSongSelect songSelect = null;
+
+            PushAndConfirm(() => songSelect = new TestSongSelect());
+
+            AddStep("Show mods overlay", () => songSelect.ModSelectOverlay.Show());
+
+            AddStep("Change ruleset to osu!taiko", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.PressKey(Key.Number2);
+
+                InputManager.ReleaseKey(Key.ControlLeft);
+                InputManager.ReleaseKey(Key.Number2);
+            });
+
+            AddAssert("Ruleset changed to osu!taiko", () => Game.Toolbar.ChildrenOfType<ToolbarRulesetSelector>().Single().Current.Value.ID == 1);
+
+            AddAssert("Mods overlay still visible", () => songSelect.ModSelectOverlay.State.Value == Visibility.Visible);
+        }
+
+        [Test]
+        public void TestBeatmapOptionsInput()
+        {
+            TestSongSelect songSelect = null;
+
+            PushAndConfirm(() => songSelect = new TestSongSelect());
+
+            AddStep("Show options overlay", () => songSelect.BeatmapOptionsOverlay.Show());
+
+            AddStep("Change ruleset to osu!taiko", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.PressKey(Key.Number2);
+
+                InputManager.ReleaseKey(Key.ControlLeft);
+                InputManager.ReleaseKey(Key.Number2);
+            });
+
+            AddAssert("Ruleset changed to osu!taiko", () => Game.Toolbar.ChildrenOfType<ToolbarRulesetSelector>().Single().Current.Value.ID == 1);
+
+            AddAssert("Options overlay still visible", () => songSelect.BeatmapOptionsOverlay.State.Value == Visibility.Visible);
         }
 
         private void pushEscape() =>
@@ -173,6 +217,8 @@ namespace osu.Game.Tests.Visual.Navigation
         private class TestSongSelect : PlaySongSelect
         {
             public ModSelectOverlay ModSelectOverlay => ModSelect;
+
+            public BeatmapOptionsOverlay BeatmapOptionsOverlay => BeatmapOptions;
         }
     }
 }

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

@@ -12,7 +12,7 @@ namespace osu.Game.Tests.Visual.Online
     [TestFixture]
     public class TestSceneFullscreenOverlay : OsuTestScene
     {
-        private FullscreenOverlay overlay;
+        private FullscreenOverlay<OverlayHeader> overlay;
 
         protected override void LoadComplete()
         {
@@ -38,10 +38,10 @@ namespace osu.Game.Tests.Visual.Online
             AddAssert("fire count 3", () => fireCount == 3);
         }
 
-        private class TestFullscreenOverlay : FullscreenOverlay
+        private class TestFullscreenOverlay : FullscreenOverlay<OverlayHeader>
         {
             public TestFullscreenOverlay()
-                : base(OverlayColourScheme.Pink)
+                : base(OverlayColourScheme.Pink, null)
             {
                 Children = new Drawable[]
                 {

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

@@ -59,7 +59,7 @@ namespace osu.Game.Tests.Visual.Online
         {
             AddStep("Set activity", () => API.Activity.Value = new UserActivity.InLobby());
 
-            AddStep("Set beatmap", () => Beatmap.Value = new DummyWorkingBeatmap(null, null)
+            AddStep("Set beatmap", () => Beatmap.Value = new DummyWorkingBeatmap(Audio, null)
             {
                 BeatmapInfo = { OnlineBeatmapID = hasOnlineId ? 1234 : (int?)null }
             });

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

@@ -1,40 +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 NUnit.Framework;
-using osu.Framework.Allocation;
-using osu.Framework.Bindables;
-using osu.Framework.Graphics;
-using osu.Game.Overlays;
-using osu.Game.Overlays.Profile.Sections;
-
-namespace osu.Game.Tests.Visual.Online
-{
-    public class TestSceneProfileCounterPill : OsuTestScene
-    {
-        [Cached]
-        private readonly OverlayColourProvider colourProvider = new OverlayColourProvider(OverlayColourScheme.Red);
-
-        private readonly CounterPill pill;
-        private readonly BindableInt value = new BindableInt();
-
-        public TestSceneProfileCounterPill()
-        {
-            Child = pill = new CounterPill
-            {
-                Anchor = Anchor.Centre,
-                Origin = Anchor.Centre,
-                Current = { BindTarget = value }
-            };
-        }
-
-        [Test]
-        public void TestVisibility()
-        {
-            AddStep("Set value to 0", () => value.Value = 0);
-            AddAssert("Check hidden", () => !pill.IsPresent);
-            AddStep("Set value to 10", () => value.Value = 10);
-            AddAssert("Check visible", () => pill.IsPresent);
-        }
-    }
-}

osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapLeaderboard.cs

@@ -5,9 +5,9 @@ using System;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Game.Beatmaps;
-using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Online.Leaderboards;
 using osu.Game.Overlays;
+using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Osu.Mods;
 using osu.Game.Scoring;
 using osu.Game.Screens.Select.Leaderboards;
@@ -53,16 +53,13 @@ namespace osu.Game.Tests.Visual.SongSelect
 
         private void showPersonalBestWithNullPosition()
         {
-            leaderboard.TopScore = new APILegacyUserTopScoreInfo
-            {
-                Position = null,
-                Score = new APILegacyScoreInfo
+            leaderboard.TopScore = new ScoreInfo
             {
                 Rank = ScoreRank.XH,
                 Accuracy = 1,
                 MaxCombo = 244,
                 TotalScore = 1707827,
-                    Mods = new[] { new OsuModHidden().Acronym, new OsuModHardRock().Acronym, },
+                Mods = new Mod[] { new OsuModHidden(), new OsuModHardRock() },
                 User = new User
                 {
                     Id = 6602580,
@@ -73,22 +70,19 @@ namespace osu.Game.Tests.Visual.SongSelect
                         FlagName = @"ES",
                     },
                 },
-                }
             };
         }
 
         private void showPersonalBest()
         {
-            leaderboard.TopScore = new APILegacyUserTopScoreInfo
+            leaderboard.TopScore = new ScoreInfo
             {
                 Position = 999,
-                Score = new APILegacyScoreInfo
-                {
                 Rank = ScoreRank.XH,
                 Accuracy = 1,
                 MaxCombo = 244,
                 TotalScore = 1707827,
-                    Mods = new[] { new OsuModHidden().Acronym, new OsuModHardRock().Acronym, },
+                Mods = new Mod[] { new OsuModHidden(), new OsuModHardRock(), },
                 User = new User
                 {
                     Id = 6602580,
@@ -99,7 +93,6 @@ namespace osu.Game.Tests.Visual.SongSelect
                         FlagName = @"ES",
                     },
                 },
-                }
             };
         }
 

osu.Game.Tests/Visual/SongSelect/TestSceneBeatmapOptionsOverlay.cs

@@ -3,9 +3,8 @@
 
 using System.ComponentModel;
 using osu.Framework.Graphics.Sprites;
+using osu.Game.Graphics;
 using osu.Game.Screens.Select.Options;
-using osuTK.Graphics;
-using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.SongSelect
 {
@@ -16,10 +15,13 @@ namespace osu.Game.Tests.Visual.SongSelect
         {
             var overlay = new BeatmapOptionsOverlay();
 
-            overlay.AddButton(@"Remove", @"from unplayed", FontAwesome.Regular.TimesCircle, Color4.Purple, null, Key.Number1);
-            overlay.AddButton(@"Clear", @"local scores", FontAwesome.Solid.Eraser, Color4.Purple, null, Key.Number2);
-            overlay.AddButton(@"Delete", @"all difficulties", FontAwesome.Solid.Trash, Color4.Pink, null, Key.Number3);
-            overlay.AddButton(@"Edit", @"beatmap", FontAwesome.Solid.PencilAlt, Color4.Yellow, null, Key.Number4);
+            var colours = new OsuColour();
+
+            overlay.AddButton(@"Manage", @"collections", FontAwesome.Solid.Book, colours.Green, null);
+            overlay.AddButton(@"Delete", @"all difficulties", FontAwesome.Solid.Trash, colours.Pink, null);
+            overlay.AddButton(@"Remove", @"from unplayed", FontAwesome.Regular.TimesCircle, colours.Purple, null);
+            overlay.AddButton(@"Clear", @"local scores", FontAwesome.Solid.Eraser, colours.Purple, null);
+            overlay.AddButton(@"Edit", @"beatmap", FontAwesome.Solid.PencilAlt, colours.Yellow, null);
 
             Add(overlay);
 

osu.Game.Tests/Visual/SongSelect/TestSceneFilterControl.cs

@@ -0,0 +1,237 @@
+// 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.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Platform;
+using osu.Framework.Testing;
+using osu.Game.Beatmaps;
+using osu.Game.Collections;
+using osu.Game.Graphics.UserInterface;
+using osu.Game.Rulesets;
+using osu.Game.Screens.Select;
+using osu.Game.Tests.Resources;
+using osuTK.Input;
+
+namespace osu.Game.Tests.Visual.SongSelect
+{
+    public class TestSceneFilterControl : OsuManualInputManagerTestScene
+    {
+        protected override Container<Drawable> Content => content;
+        private readonly Container content;
+
+        private readonly CollectionManager collectionManager;
+
+        private RulesetStore rulesets;
+        private BeatmapManager beatmapManager;
+
+        private FilterControl control;
+
+        public TestSceneFilterControl()
+        {
+            base.Content.AddRange(new Drawable[]
+            {
+                collectionManager = new CollectionManager(LocalStorage),
+                content = new Container { RelativeSizeAxes = Axes.Both }
+            });
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(GameHost host)
+        {
+            Dependencies.Cache(rulesets = new RulesetStore(ContextFactory));
+            Dependencies.Cache(beatmapManager = new BeatmapManager(LocalStorage, ContextFactory, rulesets, null, Audio, host, Beatmap.Default));
+
+            beatmapManager.Import(TestResources.GetTestBeatmapForImport()).Wait();
+        }
+
+        protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
+        {
+            var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
+            dependencies.Cache(collectionManager);
+            return dependencies;
+        }
+
+        [SetUp]
+        public void SetUp() => Schedule(() =>
+        {
+            collectionManager.Collections.Clear();
+
+            Child = control = new FilterControl
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                RelativeSizeAxes = Axes.X,
+                Height = FilterControl.HEIGHT,
+            };
+        });
+
+        [Test]
+        public void TestEmptyCollectionFilterContainsAllBeatmaps()
+        {
+            assertCollectionDropdownContains("All beatmaps");
+            assertCollectionHeaderDisplays("All beatmaps");
+        }
+
+        [Test]
+        public void TestCollectionAddedToDropdown()
+        {
+            AddStep("add collection", () => collectionManager.Collections.Add(new BeatmapCollection { Name = { Value = "1" } }));
+            AddStep("add collection", () => collectionManager.Collections.Add(new BeatmapCollection { Name = { Value = "2" } }));
+            assertCollectionDropdownContains("1");
+            assertCollectionDropdownContains("2");
+        }
+
+        [Test]
+        public void TestCollectionRemovedFromDropdown()
+        {
+            AddStep("add collection", () => collectionManager.Collections.Add(new BeatmapCollection { Name = { Value = "1" } }));
+            AddStep("add collection", () => collectionManager.Collections.Add(new BeatmapCollection { Name = { Value = "2" } }));
+            AddStep("remove collection", () => collectionManager.Collections.RemoveAt(0));
+
+            assertCollectionDropdownContains("1", false);
+            assertCollectionDropdownContains("2");
+        }
+
+        [Test]
+        public void TestCollectionRenamed()
+        {
+            AddStep("add collection", () => collectionManager.Collections.Add(new BeatmapCollection { Name = { Value = "1" } }));
+            AddStep("select collection", () =>
+            {
+                var dropdown = control.ChildrenOfType<CollectionFilterDropdown>().Single();
+                dropdown.Current.Value = dropdown.ItemSource.ElementAt(1);
+            });
+
+            addExpandHeaderStep();
+
+            AddStep("change name", () => collectionManager.Collections[0].Name.Value = "First");
+
+            assertCollectionDropdownContains("First");
+            assertCollectionHeaderDisplays("First");
+        }
+
+        [Test]
+        public void TestAllBeatmapFilterDoesNotHaveAddButton()
+        {
+            addExpandHeaderStep();
+            AddStep("hover all beatmaps", () => InputManager.MoveMouseTo(getAddOrRemoveButton(0)));
+            AddAssert("'All beatmaps' filter does not have add button", () => !getAddOrRemoveButton(0).IsPresent);
+        }
+
+        [Test]
+        public void TestCollectionFilterHasAddButton()
+        {
+            addExpandHeaderStep();
+            AddStep("add collection", () => collectionManager.Collections.Add(new BeatmapCollection { Name = { Value = "1" } }));
+            AddStep("hover collection", () => InputManager.MoveMouseTo(getAddOrRemoveButton(1)));
+            AddAssert("collection has add button", () => getAddOrRemoveButton(1).IsPresent);
+        }
+
+        [Test]
+        public void TestButtonDisabledAndEnabledWithBeatmapChanges()
+        {
+            addExpandHeaderStep();
+
+            AddStep("add collection", () => collectionManager.Collections.Add(new BeatmapCollection { Name = { Value = "1" } }));
+
+            AddStep("select available beatmap", () => Beatmap.Value = beatmapManager.GetWorkingBeatmap(beatmapManager.GetAllUsableBeatmapSets().First().Beatmaps[0]));
+            AddAssert("button enabled", () => getAddOrRemoveButton(1).Enabled.Value);
+
+            AddStep("set dummy beatmap", () => Beatmap.SetDefault());
+            AddAssert("button disabled", () => !getAddOrRemoveButton(1).Enabled.Value);
+        }
+
+        [Test]
+        public void TestButtonChangesWhenAddedAndRemovedFromCollection()
+        {
+            addExpandHeaderStep();
+
+            AddStep("select available beatmap", () => Beatmap.Value = beatmapManager.GetWorkingBeatmap(beatmapManager.GetAllUsableBeatmapSets().First().Beatmaps[0]));
+
+            AddStep("add collection", () => collectionManager.Collections.Add(new BeatmapCollection { Name = { Value = "1" } }));
+            AddAssert("button is plus", () => getAddOrRemoveButton(1).Icon.Equals(FontAwesome.Solid.PlusSquare));
+
+            AddStep("add beatmap to collection", () => collectionManager.Collections[0].Beatmaps.Add(Beatmap.Value.BeatmapInfo));
+            AddAssert("button is minus", () => getAddOrRemoveButton(1).Icon.Equals(FontAwesome.Solid.MinusSquare));
+
+            AddStep("remove beatmap from collection", () => collectionManager.Collections[0].Beatmaps.Clear());
+            AddAssert("button is plus", () => getAddOrRemoveButton(1).Icon.Equals(FontAwesome.Solid.PlusSquare));
+        }
+
+        [Test]
+        public void TestButtonAddsAndRemovesBeatmap()
+        {
+            addExpandHeaderStep();
+
+            AddStep("select available beatmap", () => Beatmap.Value = beatmapManager.GetWorkingBeatmap(beatmapManager.GetAllUsableBeatmapSets().First().Beatmaps[0]));
+
+            AddStep("add collection", () => collectionManager.Collections.Add(new BeatmapCollection { Name = { Value = "1" } }));
+            AddAssert("button is plus", () => getAddOrRemoveButton(1).Icon.Equals(FontAwesome.Solid.PlusSquare));
+
+            addClickAddOrRemoveButtonStep(1);
+            AddAssert("collection contains beatmap", () => collectionManager.Collections[0].Beatmaps.Contains(Beatmap.Value.BeatmapInfo));
+            AddAssert("button is minus", () => getAddOrRemoveButton(1).Icon.Equals(FontAwesome.Solid.MinusSquare));
+
+            addClickAddOrRemoveButtonStep(1);
+            AddAssert("collection does not contain beatmap", () => !collectionManager.Collections[0].Beatmaps.Contains(Beatmap.Value.BeatmapInfo));
+            AddAssert("button is plus", () => getAddOrRemoveButton(1).Icon.Equals(FontAwesome.Solid.PlusSquare));
+        }
+
+        [Test]
+        public void TestManageCollectionsFilterIsNotSelected()
+        {
+            addExpandHeaderStep();
+
+            AddStep("add collection", () => collectionManager.Collections.Add(new BeatmapCollection { Name = { Value = "1" } }));
+            AddStep("select collection", () =>
+            {
+                InputManager.MoveMouseTo(getCollectionDropdownItems().ElementAt(1));
+                InputManager.Click(MouseButton.Left);
+            });
+
+            addExpandHeaderStep();
+
+            AddStep("click manage collections filter", () =>
+            {
+                InputManager.MoveMouseTo(getCollectionDropdownItems().Last());
+                InputManager.Click(MouseButton.Left);
+            });
+
+            AddAssert("collection filter still selected", () => control.CreateCriteria().Collection?.Name.Value == "1");
+        }
+
+        private void assertCollectionHeaderDisplays(string collectionName, bool shouldDisplay = true)
+            => AddAssert($"collection dropdown header displays '{collectionName}'",
+                () => shouldDisplay == (control.ChildrenOfType<CollectionFilterDropdown.CollectionDropdownHeader>().Single().ChildrenOfType<SpriteText>().First().Text == collectionName));
+
+        private void assertCollectionDropdownContains(string collectionName, bool shouldContain = true) =>
+            AddAssert($"collection dropdown {(shouldContain ? "contains" : "does not contain")} '{collectionName}'",
+                // A bit of a roundabout way of going about this, see: https://github.com/ppy/osu-framework/issues/3871 + https://github.com/ppy/osu-framework/issues/3872
+                () => shouldContain == (getCollectionDropdownItems().Any(i => i.ChildrenOfType<FillFlowContainer>().OfType<IHasText>().First().Text == collectionName)));
+
+        private IconButton getAddOrRemoveButton(int index)
+            => getCollectionDropdownItems().ElementAt(index).ChildrenOfType<IconButton>().Single();
+
+        private void addExpandHeaderStep() => AddStep("expand header", () =>
+        {
+            InputManager.MoveMouseTo(control.ChildrenOfType<CollectionFilterDropdown.CollectionDropdownHeader>().Single());
+            InputManager.Click(MouseButton.Left);
+        });
+
+        private void addClickAddOrRemoveButtonStep(int index) => AddStep("click add or remove button", () =>
+        {
+            InputManager.MoveMouseTo(getAddOrRemoveButton(index));
+            InputManager.Click(MouseButton.Left);
+        });
+
+        private IEnumerable<Dropdown<CollectionFilterMenuItem>.DropdownMenu.DrawableDropdownMenuItem> getCollectionDropdownItems()
+            => control.ChildrenOfType<CollectionFilterDropdown>().Single().ChildrenOfType<Dropdown<CollectionFilterMenuItem>.DropdownMenu.DrawableDropdownMenuItem>();
+    }
+}

osu.Game.Tests/Visual/SongSelect/TestSceneUserTopScoreContainer.cs

@@ -6,11 +6,11 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 using osuTK.Graphics;
-using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Online.Leaderboards;
 using osu.Game.Overlays;
+using osu.Game.Rulesets.Mods;
 using osu.Game.Scoring;
 using osu.Game.Rulesets.Osu.Mods;
-using osu.Game.Screens.Select.Leaderboards;
 using osu.Game.Users;
 
 namespace osu.Game.Tests.Visual.SongSelect
@@ -22,7 +22,7 @@ namespace osu.Game.Tests.Visual.SongSelect
 
         public TestSceneUserTopScoreContainer()
         {
-            UserTopScoreContainer topScoreContainer;
+            UserTopScoreContainer<ScoreInfo> topScoreContainer;
 
             Add(dialogOverlay = new DialogOverlay
             {
@@ -42,7 +42,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                         RelativeSizeAxes = Axes.Both,
                         Colour = Color4.DarkGreen,
                     },
-                    topScoreContainer = new UserTopScoreContainer
+                    topScoreContainer = new UserTopScoreContainer<ScoreInfo>(s => new LeaderboardScore(s, s.Position, false))
                     {
                         Origin = Anchor.BottomCentre,
                         Anchor = Anchor.BottomCentre,
@@ -52,16 +52,14 @@ namespace osu.Game.Tests.Visual.SongSelect
 
             var scores = new[]
             {
-                new APILegacyUserTopScoreInfo
+                new ScoreInfo
                 {
                     Position = 999,
-                    Score = new APILegacyScoreInfo
-                    {
                     Rank = ScoreRank.XH,
                     Accuracy = 1,
                     MaxCombo = 244,
                     TotalScore = 1707827,
-                        Mods = new[] { new OsuModHidden().Acronym, new OsuModHardRock().Acronym, },
+                    Mods = new Mod[] { new OsuModHidden(), new OsuModHardRock(), },
                     User = new User
                     {
                         Id = 6602580,
@@ -72,13 +70,10 @@ namespace osu.Game.Tests.Visual.SongSelect
                             FlagName = @"ES",
                         },
                     },
-                    }
                 },
-                new APILegacyUserTopScoreInfo
+                new ScoreInfo
                 {
                     Position = 110000,
-                    Score = new APILegacyScoreInfo
-                    {
                     Rank = ScoreRank.X,
                     Accuracy = 1,
                     MaxCombo = 244,
@@ -93,13 +88,10 @@ namespace osu.Game.Tests.Visual.SongSelect
                             FlagName = @"BR",
                         },
                     },
-                    }
                 },
-                new APILegacyUserTopScoreInfo
+                new ScoreInfo
                 {
                     Position = 22333,
-                    Score = new APILegacyScoreInfo
-                    {
                     Rank = ScoreRank.S,
                     Accuracy = 1,
                     MaxCombo = 244,
@@ -115,7 +107,6 @@ namespace osu.Game.Tests.Visual.SongSelect
                         },
                     },
                 }
-                }
             };
 
             AddStep(@"Trigger visibility", topScoreContainer.ToggleVisibility);

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

@@ -26,9 +26,6 @@ namespace osu.Game.Tests.Visual.UserInterface
     {
         private readonly NowPlayingOverlay np;
 
-        [Cached]
-        private MusicController musicController = new MusicController();
-
         public TestSceneBeatSyncedContainer()
         {
             Clock = new FramedClock();
@@ -36,7 +33,6 @@ namespace osu.Game.Tests.Visual.UserInterface
 
             AddRange(new Drawable[]
             {
-                musicController,
                 new BeatContainer
                 {
                     Anchor = Anchor.BottomCentre,
@@ -71,6 +67,9 @@ namespace osu.Game.Tests.Visual.UserInterface
 
             private readonly Box flashLayer;
 
+            [Resolved]
+            private MusicController musicController { get; set; }
+
             public BeatContainer()
             {
                 RelativeSizeAxes = Axes.X;
@@ -165,7 +164,7 @@ namespace osu.Game.Tests.Visual.UserInterface
                 if (timingPoints.Count == 0) return 0;
 
                 if (timingPoints[^1] == current)
-                    return (int)Math.Ceiling((Beatmap.Value.Track.Length - current.Time) / current.BeatLength);
+                    return (int)Math.Ceiling((musicController.CurrentTrack.Length - current.Time) / current.BeatLength);
 
                 return (int)Math.Ceiling((getNextTimingPoint(current).Time - current.Time) / current.BeatLength);
             }

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

@@ -6,6 +6,7 @@ using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Graphics;
 using osu.Framework.Allocation;
+using osu.Framework.Audio;
 using osu.Framework.Graphics.Cursor;
 using osu.Framework.Platform;
 using osu.Framework.Testing;
@@ -79,7 +80,7 @@ namespace osu.Game.Tests.Visual.UserInterface
             var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
 
             dependencies.Cache(rulesetStore = new RulesetStore(ContextFactory));
-            dependencies.Cache(beatmapManager = new BeatmapManager(LocalStorage, ContextFactory, rulesetStore, null, Audio, dependencies.Get<GameHost>(), Beatmap.Default));
+            dependencies.Cache(beatmapManager = new BeatmapManager(LocalStorage, ContextFactory, rulesetStore, null, dependencies.Get<AudioManager>(), dependencies.Get<GameHost>(), Beatmap.Default));
             dependencies.Cache(scoreManager = new ScoreManager(rulesetStore, () => beatmapManager, LocalStorage, null, ContextFactory));
 
             beatmap = beatmapManager.Import(TestResources.GetTestBeatmapForImport()).Result.Beatmaps[0];

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

@@ -1,15 +1,10 @@
 // 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 NUnit.Framework;
 using osu.Framework.Allocation;
-using osu.Framework.Audio;
 using osu.Framework.Graphics;
-using osu.Framework.Platform;
-using osu.Game.Beatmaps;
 using osu.Game.Overlays;
-using osu.Game.Rulesets;
 using osu.Game.Rulesets.Osu;
 
 namespace osu.Game.Tests.Visual.UserInterface
@@ -20,18 +15,11 @@ namespace osu.Game.Tests.Visual.UserInterface
         [Cached]
         private MusicController musicController = new MusicController();
 
-        private WorkingBeatmap currentBeatmap;
-
         private NowPlayingOverlay nowPlayingOverlay;
 
-        private RulesetStore rulesets;
-
         [BackgroundDependencyLoader]
-        private void load(AudioManager audio, GameHost host)
+        private void load()
         {
-            Dependencies.Cache(rulesets = new RulesetStore(ContextFactory));
-            Dependencies.Cache(manager = new BeatmapManager(LocalStorage, ContextFactory, rulesets, null, audio, host, Beatmap.Default));
-
             Beatmap.Value = CreateWorkingBeatmap(new OsuRuleset().RulesetInfo);
 
             nowPlayingOverlay = new NowPlayingOverlay
@@ -51,44 +39,5 @@ namespace osu.Game.Tests.Visual.UserInterface
             AddToggleStep(@"toggle beatmap lock", state => Beatmap.Disabled = state);
             AddStep(@"hide", () => nowPlayingOverlay.Hide());
         }
-
-        private BeatmapManager manager { get; set; }
-
-        private int importId;
-
-        [Test]
-        public void TestPrevTrackBehavior()
-        {
-            // ensure we have at least two beatmaps available.
-            AddRepeatStep("import beatmap", () => manager.Import(new BeatmapSetInfo
-            {
-                Beatmaps = new List<BeatmapInfo>
-                {
-                    new BeatmapInfo
-                    {
-                        BaseDifficulty = new BeatmapDifficulty(),
-                    }
-                },
-                Metadata = new BeatmapMetadata
-                {
-                    Artist = $"a test map {importId++}",
-                    Title = "title",
-                }
-            }).Wait(), 5);
-
-            AddStep(@"Next track", () => musicController.NextTrack());
-            AddStep("Store track", () => currentBeatmap = Beatmap.Value);
-
-            AddStep(@"Seek track to 6 second", () => musicController.SeekTo(6000));
-            AddUntilStep(@"Wait for current time to update", () => currentBeatmap.Track.CurrentTime > 5000);
-
-            AddStep(@"Set previous", () => musicController.PreviousTrack());
-
-            AddAssert(@"Check beatmap didn't change", () => currentBeatmap == Beatmap.Value);
-            AddUntilStep("Wait for current time to update", () => currentBeatmap.Track.CurrentTime < 5000);
-
-            AddStep(@"Set previous", () => musicController.PreviousTrack());
-            AddAssert(@"Check beatmap did change", () => currentBeatmap != Beatmap.Value);
-        }
     }
 }

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

@@ -0,0 +1,80 @@
+// 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 NUnit.Framework;
+using osu.Game.Overlays.Profile.Sections;
+using osu.Framework.Testing;
+using System.Linq;
+using osu.Framework.Graphics;
+using osu.Game.Overlays;
+using osu.Framework.Allocation;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    public class TestScenePaginatedContainerHeader : OsuTestScene
+    {
+        [Cached]
+        private readonly OverlayColourProvider colourProvider = new OverlayColourProvider(OverlayColourScheme.Pink);
+
+        private PaginatedContainerHeader header;
+
+        [Test]
+        public void TestHiddenCounter()
+        {
+            AddStep("Create header", () => createHeader("Header with hidden counter", CounterVisibilityState.AlwaysHidden));
+            AddAssert("Value is 0", () => header.Current.Value == 0);
+            AddAssert("Counter is hidden", () => header.ChildrenOfType<CounterPill>().First().Alpha == 0);
+            AddStep("Set count 10", () => header.Current.Value = 10);
+            AddAssert("Value is 10", () => header.Current.Value == 10);
+            AddAssert("Counter is hidden", () => header.ChildrenOfType<CounterPill>().First().Alpha == 0);
+        }
+
+        [Test]
+        public void TestVisibleCounter()
+        {
+            AddStep("Create header", () => createHeader("Header with visible counter", CounterVisibilityState.AlwaysVisible));
+            AddAssert("Value is 0", () => header.Current.Value == 0);
+            AddAssert("Counter is visible", () => header.ChildrenOfType<CounterPill>().First().Alpha == 1);
+            AddStep("Set count 10", () => header.Current.Value = 10);
+            AddAssert("Value is 10", () => header.Current.Value == 10);
+            AddAssert("Counter is visible", () => header.ChildrenOfType<CounterPill>().First().Alpha == 1);
+        }
+
+        [Test]
+        public void TestVisibleWhenZeroCounter()
+        {
+            AddStep("Create header", () => createHeader("Header with visible when zero counter", CounterVisibilityState.VisibleWhenZero));
+            AddAssert("Value is 0", () => header.Current.Value == 0);
+            AddAssert("Counter is visible", () => header.ChildrenOfType<CounterPill>().First().Alpha == 1);
+            AddStep("Set count 10", () => header.Current.Value = 10);
+            AddAssert("Value is 10", () => header.Current.Value == 10);
+            AddAssert("Counter is hidden", () => header.ChildrenOfType<CounterPill>().First().Alpha == 0);
+            AddStep("Set count 0", () => header.Current.Value = 0);
+            AddAssert("Value is 0", () => header.Current.Value == 0);
+            AddAssert("Counter is visible", () => header.ChildrenOfType<CounterPill>().First().Alpha == 1);
+        }
+
+        [Test]
+        public void TestInitialVisibility()
+        {
+            AddStep("Create header with 0 value", () => createHeader("Header with visible when zero counter", CounterVisibilityState.VisibleWhenZero, 0));
+            AddAssert("Value is 0", () => header.Current.Value == 0);
+            AddAssert("Counter is visible", () => header.ChildrenOfType<CounterPill>().First().Alpha == 1);
+
+            AddStep("Create header with 1 value", () => createHeader("Header with visible when zero counter", CounterVisibilityState.VisibleWhenZero, 1));
+            AddAssert("Value is 1", () => header.Current.Value == 1);
+            AddAssert("Counter is hidden", () => header.ChildrenOfType<CounterPill>().First().Alpha == 0);
+        }
+
+        private void createHeader(string text, CounterVisibilityState state, int initialValue = 0)
+        {
+            Clear();
+            Add(header = new PaginatedContainerHeader(text, state)
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                Current = { Value = initialValue }
+            });
+        }
+    }
+}

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

@@ -2,32 +2,35 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
+using osu.Framework.Testing;
 using osu.Framework.Utils;
 using osu.Game.Beatmaps;
 using osu.Game.Overlays.Music;
 using osuTK;
+using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.UserInterface
 {
-    public class TestScenePlaylistOverlay : OsuTestScene
+    public class TestScenePlaylistOverlay : OsuManualInputManagerTestScene
     {
         private readonly BindableList<BeatmapSetInfo> beatmapSets = new BindableList<BeatmapSetInfo>();
 
+        private PlaylistOverlay playlistOverlay;
+
         [SetUp]
         public void Setup() => Schedule(() =>
         {
-            PlaylistOverlay overlay;
-
             Child = new Container
             {
                 Anchor = Anchor.Centre,
                 Origin = Anchor.Centre,
                 Size = new Vector2(300, 500),
-                Child = overlay = new PlaylistOverlay
+                Child = playlistOverlay = new PlaylistOverlay
                 {
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,
@@ -53,7 +56,45 @@ namespace osu.Game.Tests.Visual.UserInterface
                 });
             }
 
-            overlay.BeatmapSets.BindTo(beatmapSets);
+            playlistOverlay.BeatmapSets.BindTo(beatmapSets);
         });
+
+        [Test]
+        public void TestRearrangeItems()
+        {
+            AddUntilStep("wait for animations to complete", () => !playlistOverlay.Transforms.Any());
+
+            AddStep("hold 1st item handle", () =>
+            {
+                var handle = this.ChildrenOfType<PlaylistItem.PlaylistItemHandle>().First();
+                InputManager.MoveMouseTo(handle.ScreenSpaceDrawQuad.Centre);
+                InputManager.PressButton(MouseButton.Left);
+            });
+
+            AddStep("drag to 5th", () =>
+            {
+                var item = this.ChildrenOfType<PlaylistItem>().ElementAt(4);
+                InputManager.MoveMouseTo(item.ScreenSpaceDrawQuad.Centre);
+            });
+
+            AddAssert("song 1 is 5th", () => beatmapSets[4].Metadata.Title == "Some Song 1");
+
+            AddStep("release handle", () => InputManager.ReleaseButton(MouseButton.Left));
+        }
+
+        [Test]
+        public void TestFiltering()
+        {
+            AddStep("set filter to \"10\"", () =>
+            {
+                var filterControl = playlistOverlay.ChildrenOfType<FilterControl>().Single();
+                filterControl.Search.Current.Value = "10";
+            });
+
+            AddAssert("results filtered correctly",
+                () => playlistOverlay.ChildrenOfType<PlaylistItem>()
+                                     .Where(item => item.MatchingFilter)
+                                     .All(item => item.FilterTerms.Any(term => term.Contains("10"))));
+        }
     }
 }

osu.Game.Tests/WaveformTestBeatmap.cs

@@ -52,7 +52,7 @@ namespace osu.Game.Tests
 
         protected override Waveform GetWaveform() => new Waveform(trackStore.GetStream(firstAudioFile));
 
-        protected override Track GetTrack() => trackStore.Get(firstAudioFile);
+        protected override Track GetBeatmapTrack() => trackStore.Get(firstAudioFile);
 
         private string firstAudioFile
         {

osu.Game.Tests/osu.Game.Tests.csproj

@@ -3,7 +3,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
     <PackageReference Include="DeepEqual" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />

osu.Game.Tournament.Tests/Components/TestSceneDateTextBox.cs

@@ -0,0 +1,41 @@
+// 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 NUnit.Framework;
+using osu.Game.Tests.Visual;
+using osu.Game.Tournament.Components;
+using osuTK;
+using osuTK.Input;
+
+namespace osu.Game.Tournament.Tests.Components
+{
+    public class TestSceneDateTextBox : OsuManualInputManagerTestScene
+    {
+        private DateTextBox textBox;
+
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            Child = textBox = new DateTextBox
+            {
+                Width = 0.3f
+            };
+        });
+
+        [Test]
+        public void TestCommitWithoutSettingBindable()
+        {
+            AddStep("click textbox", () =>
+            {
+                InputManager.MoveMouseTo(textBox);
+                InputManager.Click(MouseButton.Left);
+            });
+
+            AddStep("unfocus", () =>
+            {
+                InputManager.MoveMouseTo(Vector2.Zero);
+                InputManager.Click(MouseButton.Left);
+            });
+        }
+    }
+}

osu.Game.Tournament.Tests/osu.Game.Tournament.Tests.csproj

@@ -5,7 +5,7 @@
   </PropertyGroup>
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
   </ItemGroup>

osu.Game.Tournament/Components/DateTextBox.cs

@@ -22,11 +22,12 @@ namespace osu.Game.Tournament.Components
         }
 
         // hold a reference to the provided bindable so we don't have to in every settings section.
-        private Bindable<DateTimeOffset> bindable;
+        private Bindable<DateTimeOffset> bindable = new Bindable<DateTimeOffset>();
 
         public DateTextBox()
         {
             base.Bindable = new Bindable<string>();
+
             ((OsuTextBox)Control).OnCommit = (sender, newText) =>
             {
                 try