Nullability: verify ReferenceCount<object>(null) GetHashCode (#539)

bitfaster · Dec 9, 2023 · 3e8504c · 3e8504c
1 parent ef211dd
commit 3e8504c
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/BitFaster.Caching.UnitTests/ReferenceCountTests.cs b/BitFaster.Caching.UnitTests/ReferenceCountTests.cs
@@ -58,5 +58,15 @@ public void WhenObjectsAreDifferentHashcodesAreDifferent()
 
             a.GetHashCode().Should().NotBe(b.GetHashCode());
         }
+
+        [Fact]
+        public void WhenObjectIsNullGetHashCodeDoesntThrow()
+        {
+            var a = new ReferenceCount<object>(null);
+
+            // nullable static analysis suggests this is broken, but it is legal to call
+            // EqualityComparer<TValue>.Default.GetHashCode(null)
+            a.GetHashCode();
+        }
     }
 }