Unit test for #2271 (v2)

bradwilson · bradwilson · commit e022e5cf4494 · 2024-06-16T10:09:58.000-07:00
diff --git a/src/xunit.assert/Asserts b/src/xunit.assert/Asserts
@@ -1 +1 @@
-Subproject commit dcb0418f938b79b9581ea293c62574f248a18462
+Subproject commit cc6db0abc286f43b564f98000fbadf912db73698
diff --git a/test/test.xunit.assert/Asserts/EqualityAssertsTests.cs b/test/test.xunit.assert/Asserts/EqualityAssertsTests.cs
@@ -12,6 +12,44 @@ public class EqualityAssertsTests
 {
 	public class Equal
 	{
+		public class ReferenceEquality
+		{
+			// https://github.com/xunit/xunit/issues/2271
+			[Fact]
+			public void TwoIdenticalReferencesShouldBeEqual()
+			{
+				Field x = new Field();
+
+				Assert.Equal(x, x);
+			}
+
+			sealed class Field : IReadOnlyList<Field>
+			{
+				Field IReadOnlyList<Field>.this[int index]
+				{
+					get
+					{
+						if (index != 0)
+							throw new ArgumentOutOfRangeException(nameof(index));
+
+						return this;
+					}
+				}
+
+				int IReadOnlyCollection<Field>.Count => 1;
+
+				IEnumerator<Field> IEnumerable<Field>.GetEnumerator()
+				{
+					yield return this;
+				}
+
+				IEnumerator IEnumerable.GetEnumerator()
+				{
+					yield return this;
+				}
+			}
+		}
+
 		public class Intrinsics
 		{
 			[Fact]
