Add a test for fruit randomness

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

@@ -0,0 +1,95 @@
+// 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.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Catch.Objects.Drawables;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Catch.Tests
+{
+    public class TestSceneFruitRandomness : OsuTestScene
+    {
+        [Test]
+        public void TestFruitRandomness()
+        {
+            Bindable<int> randomSeed = new Bindable<int>();
+
+            TestDrawableFruit drawableFruit;
+            TestDrawableBanana drawableBanana;
+
+            Add(new TestDrawableCatchHitObjectSpecimen(drawableFruit = new TestDrawableFruit(new Fruit())
+            {
+                RandomSeed = { BindTarget = randomSeed }
+            }) { X = -200 });
+            Add(new TestDrawableCatchHitObjectSpecimen(drawableBanana = new TestDrawableBanana(new Banana())
+            {
+                RandomSeed = { BindTarget = randomSeed }
+            }));
+
+            float fruitRotation = 0;
+            float bananaRotation = 0;
+            float bananaScale = 0;
+
+            AddStep("set random seed to 0", () =>
+            {
+                drawableFruit.HitObject.StartTime = 500;
+                randomSeed.Value = 0;
+
+                fruitRotation = drawableFruit.InnerRotation;
+                bananaRotation = drawableBanana.InnerRotation;
+                bananaScale = drawableBanana.InnerScale;
+            });
+
+            AddStep("change random seed", () =>
+            {
+                randomSeed.Value = 10;
+            });
+
+            AddAssert("fruit rotation is changed", () => drawableFruit.InnerRotation != fruitRotation);
+            AddAssert("banana rotation is changed", () => drawableBanana.InnerRotation != bananaRotation);
+            AddAssert("banana scale is changed", () => drawableBanana.InnerScale != bananaScale);
+
+            AddStep("reset random seed", () =>
+            {
+                randomSeed.Value = 0;
+            });
+
+            AddAssert("rotation and scale restored", () =>
+                drawableFruit.InnerRotation == fruitRotation &&
+                drawableBanana.InnerRotation == bananaRotation &&
+                drawableBanana.InnerScale == bananaScale);
+
+            AddStep("change start time", () =>
+            {
+                drawableFruit.HitObject.StartTime = 1000;
+            });
+
+            AddAssert("random seed is changed", () => randomSeed.Value == 1000);
+
+            AddSliderStep("random seed", 0, 100, 0, x => randomSeed.Value = x);
+        }
+
+        private class TestDrawableFruit : DrawableFruit
+        {
+            public float InnerRotation => ScaleContainer.Rotation;
+
+            public TestDrawableFruit(Fruit h)
+                : base(h)
+            {
+            }
+        }
+
+        private class TestDrawableBanana : DrawableBanana
+        {
+            public float InnerRotation => ScaleContainer.Rotation;
+            public float InnerScale => ScaleContainer.Scale.X;
+
+            public TestDrawableBanana(Banana h)
+                : base(h)
+            {
+            }
+        }
+    }
+}