From 392ce7390e179d58ae582afcb3bd8e393f844236 Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Thu, 14 Apr 2022 18:58:16 +0900
Subject: [PATCH] Add test scene covering `ScalingContainer` delayed animations

---
 .../TestSceneScalingContainer.cs              | 114 ++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 osu.Game.Tests/Visual/UserInterface/TestSceneScalingContainer.cs

diff --git a/osu.Game.Tests/Visual/UserInterface/TestSceneScalingContainer.cs b/osu.Game.Tests/Visual/UserInterface/TestSceneScalingContainer.cs
new file mode 100644
index 0000000000..5d554719a5
--- /dev/null
+++ b/osu.Game.Tests/Visual/UserInterface/TestSceneScalingContainer.cs
@@ -0,0 +1,114 @@
+// 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.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Primitives;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Configuration;
+using osu.Game.Graphics.Containers;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    [TestFixture]
+    public class TestSceneScalingContainer : OsuTestScene
+    {
+        private OsuConfigManager osuConfigManager { get; set; }
+
+        private ScalingContainer scaling1;
+        private ScalingContainer scaling2;
+        private Box scaleTarget;
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            osuConfigManager = new OsuConfigManager(LocalStorage);
+
+            Dependencies.CacheAs(osuConfigManager);
+
+            Children = new Drawable[]
+            {
+                new Container
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Children = new Drawable[]
+                    {
+                        scaling1 = new ScalingContainer(ScalingMode.Everything)
+                        {
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                            Scale = new Vector2(0.8f),
+                            Children = new Drawable[]
+                            {
+                                scaling2 = new ScalingContainer(ScalingMode.Everything)
+                                {
+                                    Anchor = Anchor.Centre,
+                                    Origin = Anchor.Centre,
+                                    Scale = new Vector2(0.8f),
+                                    Children = new Drawable[]
+                                    {
+                                        new Box
+                                        {
+                                            Colour = Color4.Purple,
+                                            RelativeSizeAxes = Axes.Both,
+                                        },
+                                        scaleTarget = new Box
+                                        {
+                                            Anchor = Anchor.Centre,
+                                            Origin = Anchor.Centre,
+                                            Colour = Color4.White,
+                                            Size = new Vector2(100),
+                                        },
+                                    }
+                                }
+                            }
+                        }
+                    }
+                },
+            };
+        }
+
+        [Test]
+        public void TestScaling()
+        {
+            AddStep("adjust scale", () => osuConfigManager.SetValue(OsuSetting.UIScale, 2f));
+
+            checkForCorrectness();
+
+            AddStep("adjust scale", () => osuConfigManager.SetValue(OsuSetting.UIScale, 0.5f));
+
+            checkForCorrectness();
+        }
+
+        private void checkForCorrectness()
+        {
+            Quad? scaling1LastQuad = null;
+            Quad? scaling2LastQuad = null;
+            Quad? scalingTargetLastQuad = null;
+
+            AddUntilStep("ensure dimensions don't change", () =>
+            {
+                if (scaling1LastQuad.HasValue && scaling2LastQuad.HasValue)
+                {
+                    // check inter-frame changes to make sure they match expectations.
+                    Assert.That(scaling1.ScreenSpaceDrawQuad.AlmostEquals(scaling1LastQuad.Value), Is.True);
+                    Assert.That(scaling2.ScreenSpaceDrawQuad.AlmostEquals(scaling2LastQuad.Value), Is.True);
+                }
+
+                scaling1LastQuad = scaling1.ScreenSpaceDrawQuad;
+                scaling2LastQuad = scaling2.ScreenSpaceDrawQuad;
+
+                // wait for scaling to stop.
+                bool scalingFinished = scalingTargetLastQuad.HasValue && scaleTarget.ScreenSpaceDrawQuad.AlmostEquals(scalingTargetLastQuad.Value);
+
+                scalingTargetLastQuad = scaleTarget.ScreenSpaceDrawQuad;
+
+                return scalingFinished;
+            });
+        }
+    }
+}