public void NonGenericCompareInts()
{
var comparer = (IEqualityComparer)EqualityComparerEx.Key((int a) => a);
object one = 1;
object two = 2;
Assert.True(comparer.Equals(one, 1));
Assert.False(comparer.Equals(one, two));
// ReSharper disable ReturnValueOfPureMethodIsNotUsed
Assert.Throws <ArgumentException>(() => comparer.Equals(one, "1"));
Assert.Equal(comparer.GetHashCode(one), comparer.GetHashCode(1));
Assert.NotEqual(comparer.GetHashCode(one), comparer.GetHashCode(two));
Assert.Throws <ArgumentException>(() => comparer.GetHashCode("1"));
// ReSharper restore ReturnValueOfPureMethodIsNotUsed
}
public void CompareTestClassBySecondProp()
{
var o1 = new ComparersTestClass {
A = "test1", B = 1
};
var oe1 = new ComparersTestClass {
A = "test1", B = 1
};
var o2 = new ComparersTestClass {
A = "test1", B = 2
};
var comparer = EqualityComparerEx.Key((ComparersTestClass a) => a.B);
Assert.True(comparer.Equals(o1, o1));
Assert.True(comparer.Equals(o1, oe1));
Assert.False(comparer.Equals(o1, o2));
Assert.Equal(comparer.GetHashCode(o1), comparer.GetHashCode(o1));
Assert.Equal(comparer.GetHashCode(o1), comparer.GetHashCode(oe1));
Assert.NotEqual(comparer.GetHashCode(o1), comparer.GetHashCode(o2));
}