Add failing test

osu.Framework.Tests/Input/HandleInputCache/HandleInputCacheTest.cs

@@ -0,0 +1,62 @@
+// 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.Graphics;
+using osu.Framework.Input.Events;
+
+namespace osu.Framework.Tests.Input.HandleInputCache
+{
+    public partial class HandleInputCacheTest
+    {
+        [Test]
+        public void TestNonPartialLeafClass()
+        {
+            var d = new NonPartialLeafClass();
+
+            Assert.That(Drawable.HandleInputCache.RequestsPositionalInput(d));
+            Assert.That(Drawable.HandleInputCache.RequestsNonPositionalInput(d));
+        }
+
+        [Test]
+        public void TestPartialLeafClass()
+        {
+            var d = new PartialLeafClass();
+
+            Assert.That(Drawable.HandleInputCache.RequestsPositionalInput(d));
+            Assert.That(Drawable.HandleInputCache.RequestsNonPositionalInput(d));
+        }
+
+        [Test]
+        public void TestPartialLeafClassWithNonPartialIntermediateClass()
+        {
+            var d = new PartialLeafClassWithIntermediateNonPartial();
+
+            Assert.That(Drawable.HandleInputCache.RequestsPositionalInput(d));
+            Assert.That(Drawable.HandleInputCache.RequestsNonPositionalInput(d));
+        }
+
+#pragma warning disable OFSG001
+        private sealed class NonPartialLeafClass : Drawable
+        {
+            protected override bool Handle(UIEvent e) => true;
+        }
+#pragma warning restore OFSG001
+
+        private partial class PartialLeafClass : Drawable
+        {
+            protected override bool Handle(UIEvent e) => true;
+        }
+
+#pragma warning disable OFSG001
+        private class IntermediateNonPartialClass : Drawable
+        {
+            protected override bool Handle(UIEvent e) => true;
+        }
+#pragma warning restore OFSG001
+
+        private partial class PartialLeafClassWithIntermediateNonPartial : IntermediateNonPartialClass
+        {
+        }
+    }
+}

osu.Framework/Graphics/Drawable_HandleInputCache.cs

@@ -16,7 +16,7 @@ namespace osu.Framework.Graphics
         /// <summary>
         /// Nested class which is used for caching <see cref="HandleNonPositionalInput"/>, <see cref="HandlePositionalInput"/> values.
         /// </summary>
-        private static class HandleInputCache
+        internal static class HandleInputCache
         {
             private static readonly ConcurrentDictionary<Type, bool> positional_cached_values = new ConcurrentDictionary<Type, bool>();
             private static readonly ConcurrentDictionary<Type, bool> non_positional_cached_values = new ConcurrentDictionary<Type, bool>();