Add test for catch hidden mod

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

@@ -0,0 +1,56 @@
+// 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.Testing;
+using osu.Game.Beatmaps;
+using osu.Game.Configuration;
+using osu.Game.Rulesets.Catch.Mods;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Catch.Objects.Drawables;
+using osu.Game.Rulesets.Catch.UI;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Tests.Visual;
+using osuTK;
+
+namespace osu.Game.Rulesets.Catch.Tests
+{
+    public class TestSceneCatchModHidden : ModTestScene
+    {
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            LocalConfig.Set(OsuSetting.IncreaseFirstObjectVisibility, false);
+        }
+
+        [Test]
+        public void TestJuiceStream()
+        {
+            CreateModTest(new ModTestData
+            {
+                Beatmap = new Beatmap
+                {
+                    HitObjects = new List<HitObject>
+                    {
+                        new JuiceStream
+                        {
+                            StartTime = 1000,
+                            Path = new SliderPath(PathType.Linear, new[] { Vector2.Zero, new Vector2(0, -192) }),
+                            X = CatchPlayfield.WIDTH / 2
+                        }
+                    }
+                },
+                Mod = new CatchModHidden(),
+                PassCondition = () => Player.Results.Count > 0
+                                      && Player.ChildrenOfType<DrawableJuiceStream>().Single().Alpha > 0
+                                      && Player.ChildrenOfType<DrawableFruit>().Last().Alpha > 0
+            });
+        }
+
+        protected override Ruleset CreatePlayerRuleset() => new CatchRuleset();
+    }
+}