public void CompareInts() { var comparer = EqualityComparerEx.Func((int a, int b) => a == b); Assert.True(comparer.Equals(1, 1)); Assert.False(comparer.Equals(1, 2)); // ReSharper disable once EqualExpressionComparison Assert.True(comparer.GetHashCode(1) == comparer.GetHashCode(1)); Assert.False(comparer.GetHashCode(1) == comparer.GetHashCode(2)); }
public void NonGenericCompareInts() { var comparer = EqualityComparerEx.Func <int>((a, b) => a == b); object one = 1; object two = 2; var comparerObj = comparer as IEqualityComparer; Assert.True(comparerObj.Equals(one, 1)); Assert.False(comparerObj.Equals(one, two)); // ReSharper disable once EqualExpressionComparison // ReSharper disable once ReturnValueOfPureMethodIsNotUsed Assert.Throws <ArgumentException>(() => comparerObj.Equals(one, "1")); Assert.True(comparerObj.GetHashCode(one) == comparer.GetHashCode(1)); Assert.False(comparerObj.GetHashCode(one) == comparerObj.GetHashCode(two)); // ReSharper disable once ReturnValueOfPureMethodIsNotUsed Assert.Throws <ArgumentException>(() => comparerObj.GetHashCode("1")); }
public void CompareIntsUsingSignComparer() { var array1 = new[] { 1, 2, 3 }; var array2 = new[] { 2, 3, 5 }; var array3 = new[] { 1, 3, -3 }; var array4 = new[] { 1, 2, 3, 4 }; var comparer = EqualityComparerEx.Array(EqualityComparerEx.Func <int>((x, y) => Math.Sign(x) == Math.Sign(y), Math.Sign)); var hashCode1 = comparer.GetHashCode(array1); var hashCode2 = comparer.GetHashCode(array2); var hashCode3 = comparer.GetHashCode(array3); var hashCode4 = comparer.GetHashCode(array4); Assert.Equal(hashCode1, hashCode2); Assert.NotEqual(hashCode1, hashCode3); Assert.NotEqual(hashCode1, hashCode4); Assert.True(comparer.Equals(array1, array1)); Assert.True(comparer.Equals(array1, array2)); Assert.False(comparer.Equals(array1, array3)); Assert.False(comparer.Equals(array1, array4)); }
public void CompareTestClassByOneProp() { var o1 = new ComparersTestClass { A = "test1", B = 1 }; var oe1 = new ComparersTestClass { A = "test1", B = 2 }; var o2 = new ComparersTestClass { A = "test2", B = 2 }; var comparer = EqualityComparerEx.Func <ComparersTestClass>((a, b) => a.A == b.A, a => a.A.GetHashCode()); Assert.True(comparer.Equals(o1, o1)); Assert.True(comparer.Equals(o1, oe1)); Assert.False(comparer.Equals(o1, o2)); // ReSharper disable once EqualExpressionComparison Assert.True(comparer.GetHashCode(o1) == comparer.GetHashCode(o1)); Assert.True(comparer.GetHashCode(o1) == comparer.GetHashCode(oe1)); Assert.False(comparer.GetHashCode(o1) == comparer.GetHashCode(o2)); }