Fix + cleanup testcases

osu.Game/Tests/Visual/EditorClockTestCase.cs

@@ -0,0 +1,62 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Allocation;
+using osu.Framework.Input;
+using osu.Framework.Timing;
+using osu.Game.Beatmaps;
+using osu.Game.Screens.Edit;
+using osu.Game.Screens.Edit.Screens.Compose;
+
+namespace osu.Game.Tests.Visual
+{
+    /// <summary>
+    /// Provides a clock, beat-divisor, and scrolling capability for test cases of editor components that
+    /// are preferrably tested within the presence of a clock and seek controls.
+    /// </summary>
+    public abstract class EditorClockTestCase : OsuTestCase
+    {
+        protected readonly BindableBeatDivisor BeatDivisor = new BindableBeatDivisor();
+        protected EditorClock Clock { get; private set; }
+
+        private DependencyContainer dependencies;
+
+        protected override IReadOnlyDependencyContainer CreateLocalDependencies(IReadOnlyDependencyContainer parent)
+            => dependencies = new DependencyContainer(parent);
+
+        private OsuGameBase osuGame;
+
+        [BackgroundDependencyLoader]
+        private void load(OsuGameBase osuGame)
+        {
+            this.osuGame = osuGame;
+
+            osuGame.Beatmap.ValueChanged += reinitializeClock;
+            reinitializeClock(osuGame.Beatmap.Value);
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            osuGame.Beatmap.ValueChanged -= reinitializeClock;
+
+            base.Dispose(isDisposing);
+        }
+
+        private void reinitializeClock(WorkingBeatmap working)
+        {
+            Clock = new EditorClock(working.Beatmap.ControlPointInfo, BeatDivisor) { IsCoupled = false };
+            dependencies.CacheAs<IFrameBasedClock>(Clock);
+            dependencies.CacheAs<IAdjustableClock>(Clock);
+        }
+
+        protected override bool OnWheel(InputState state)
+        {
+            if (state.Mouse.WheelDelta > 0)
+                Clock.SeekBackward(true);
+            else
+                Clock.SeekForward(true);
+
+            return true;
+        }
+    }
+}