2 // Unit tests for System.Collections.Generic.EqualityComparer
5 // Sebastien Pouliot <sebastien@ximian.com>
7 // Copyright (C) 2008 Novell, Inc (http://www.novell.com)
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31 using System.Collections;
32 using System.Collections.Generic;
34 using NUnit.Framework;
36 namespace MonoTests.System.Collections.Generic {
39 public class EqualityComparerTest {
47 public void Default_GetHashCode_Null ()
49 // https://bugzilla.novell.com/show_bug.cgi?id=372892
50 Assert.AreEqual (0, EqualityComparer<object>.Default.GetHashCode (null), "object");
51 Assert.AreEqual (0, EqualityComparer<string>.Default.GetHashCode (null), "string");
55 public void NonGenericGetHashCodeForNullArgument ()
57 IEqualityComparer comparer = EqualityComparer<object>.Default;
58 Assert.AreEqual (0, comparer.GetHashCode (null));
62 public void NonGenericEqualsForNullArguments ()
64 IEqualityComparer comparer = EqualityComparer<object>.Default;
65 Assert.IsTrue (comparer.Equals (null, null));
69 public void EnumComparison ()
71 Assert.IsFalse (EqualityComparer<E>.Default.Equals (E.A, E.B));
72 Assert.IsFalse (EqualityComparer<object>.Default.Equals (E.A, E.B));