Add some tests

osu.Game.Tests/Gameplay/TestSceneDrainingHealthProcessor.cs

@@ -0,0 +1,149 @@
+// 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.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.MathUtils;
+using osu.Framework.Testing;
+using osu.Framework.Timing;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Judgements;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Scoring;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Tests.Gameplay
+{
+    [HeadlessTest]
+    public class TestSceneDrainingHealthProcessor : OsuTestScene
+    {
+        private Bindable<bool> breakTime;
+        private HealthProcessor processor;
+        private ManualClock clock;
+
+        [Test]
+        public void TestInitialHealthStartsAtOne()
+        {
+            createProcessor(createBeatmap(1000, 2000));
+
+            assertHealthEqualTo(1);
+        }
+
+        [Test]
+        public void TestHealthNotDrainedBeforeGameplayStart()
+        {
+            createProcessor(createBeatmap(1000, 2000));
+
+            setTime(100);
+            assertHealthEqualTo(1);
+            setTime(900);
+            assertHealthEqualTo(1);
+        }
+
+        [Test]
+        public void TestHealthNotDrainedAfterGameplayEnd()
+        {
+            createProcessor(createBeatmap(1000, 2000));
+            setTime(2001); // After the hitobjects
+            setHealth(1); // Reset the current health for assertions to take place
+
+            setTime(2100);
+            assertHealthEqualTo(1);
+            setTime(3000);
+            assertHealthEqualTo(1);
+        }
+
+        [Test]
+        public void TestHealthNotDrainedDuringBreak()
+        {
+            createProcessor(createBeatmap(0, 2000));
+            setBreak(true);
+
+            setTime(700);
+            assertHealthEqualTo(1);
+            setTime(900);
+            assertHealthEqualTo(1);
+        }
+
+        [Test]
+        public void TestHealthDrainedDuringGameplay()
+        {
+            createProcessor(createBeatmap(0, 1000));
+
+            setTime(500);
+            assertHealthNotEqualTo(1);
+        }
+
+        [Test]
+        public void TestHealthGainedOnHit()
+        {
+            Beatmap beatmap = createBeatmap(0, 1000);
+
+            createProcessor(beatmap);
+            setTime(10); // Decrease health slightly
+            assertHealthNotEqualTo(1);
+
+            AddStep("apply hit result", () => processor.ApplyResult(new JudgementResult(beatmap.HitObjects[0], new Judgement()) { Type = HitResult.Perfect }));
+            assertHealthEqualTo(1);
+        }
+
+        [Test]
+        public void TestHealthRemovedOnRevert()
+        {
+            var beatmap = createBeatmap(0, 1000);
+            JudgementResult result = null;
+
+            createProcessor(beatmap);
+            setTime(10); // Decrease health slightly
+            AddStep("apply hit result", () => processor.ApplyResult(result = new JudgementResult(beatmap.HitObjects[0], new Judgement()) { Type = HitResult.Perfect }));
+
+            AddStep("revert hit result", () => processor.RevertResult(result));
+            assertHealthNotEqualTo(1);
+        }
+
+        private Beatmap createBeatmap(double startTime, double endTime)
+        {
+            var beatmap = new Beatmap
+            {
+                BeatmapInfo = { BaseDifficulty = { DrainRate = 5 } },
+            };
+
+            for (double time = startTime; time <= endTime; time += 100)
+                beatmap.HitObjects.Add(new JudgeableHitObject { StartTime = time });
+
+            return beatmap;
+        }
+
+        private void createProcessor(Beatmap beatmap) => AddStep("create processor", () =>
+        {
+            breakTime = new Bindable<bool>();
+
+            Child = processor = new DrainingHealthProcessor(beatmap.HitObjects[0].StartTime).With(d =>
+            {
+                d.RelativeSizeAxes = Axes.Both;
+                d.Clock = new FramedClock(clock = new ManualClock());
+            });
+
+            processor.IsBreakTime.BindTo(breakTime);
+            processor.ApplyBeatmap(beatmap);
+        });
+
+        private void setTime(double time) => AddStep($"set time = {time}", () => clock.CurrentTime = time);
+
+        private void setHealth(double health) => AddStep($"set health = {health}", () => processor.Health.Value = health);
+
+        private void setBreak(bool enabled) => AddStep($"{(enabled ? "enable" : "disable")} break", () => breakTime.Value = enabled);
+
+        private void assertHealthEqualTo(double value)
+            => AddAssert($"health = {value}", () => Precision.AlmostEquals(value, processor.Health.Value, 0.0001f));
+
+        private void assertHealthNotEqualTo(double value)
+            => AddAssert($"health != {value}", () => !Precision.AlmostEquals(value, processor.Health.Value, 0.0001f));
+
+        private class JudgeableHitObject : HitObject
+        {
+            public override Judgement CreateJudgement() => new Judgement();
+        }
+    }
+}