Add a test case which starts the game

osu.Game.Tests/Visual/TestCaseOsuGame.cs

@@ -0,0 +1,39 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.Collections.Generic;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Timing;
+using osu.Game.Screens;
+using osu.Game.Screens.Menu;
+using OpenTK.Graphics;
+
+namespace osu.Game.Tests.Visual
+{
+    public class TestCaseOsuGame : OsuTestCase
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(OsuLogo),
+        };
+
+        public TestCaseOsuGame()
+        {
+            var rateAdjustClock = new StopwatchClock(true);
+            var framedClock = new FramedClock(rateAdjustClock);
+            framedClock.ProcessFrame();
+
+            Add(new Box
+            {
+                RelativeSizeAxes = Axes.Both,
+                Colour = Color4.Black,
+            });
+
+            Add(new Loader());
+
+            AddSliderStep("Playback speed", 0.0, 2.0, 1, v => rateAdjustClock.Rate = v);
+        }
+    }
+}

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

@@ -122,6 +122,7 @@
     <Compile Include="Visual\TestCaseNotificationOverlay.cs" />
     <Compile Include="Visual\TestCaseOnScreenDisplay.cs" />
     <Compile Include="Visual\TestCaseAllPlayers.cs" />
+    <Compile Include="Visual\TestCaseOsuGame.cs" />
     <Compile Include="Visual\TestCasePlaySongSelect.cs" />
     <Compile Include="Visual\TestCaseReplay.cs" />
     <Compile Include="Visual\TestCaseReplaySettingsOverlay.cs" />

osu.Game/Screens/Loader.cs

@@ -8,7 +8,7 @@ using OpenTK;
 
 namespace osu.Game.Screens
 {
-    internal class Loader : OsuScreen
+    public class Loader : OsuScreen
     {
         public override bool ShowOverlays => false;
 
@@ -30,7 +30,7 @@ namespace osu.Game.Screens
         }
 
         [BackgroundDependencyLoader]
-        private void load(OsuGame game)
+        private void load(OsuGameBase game)
         {
             if (game.IsDeployedBuild)
                 LoadComponentAsync(new Disclaimer(), d => Push(d));

osu.Game/Screens/Menu/MainMenu.cs

@@ -59,13 +59,16 @@ namespace osu.Game.Screens.Menu
             };
         }
 
-        [BackgroundDependencyLoader]
+        [BackgroundDependencyLoader(true)]
-        private void load(OsuGame game)
+        private void load(OsuGame game = null)
         {
             LoadComponentAsync(background);
 
+            if (game != null)
+            {
                 buttons.OnSettings = game.ToggleSettings;
                 buttons.OnDirect = game.ToggleDirect;
+            }
 
             preloadSongSelect();
         }