public void NullsHaveHashOfZero()
{
var comparer = new DelegateEqualityComparer <ExampleClass>((c1, c2) => false, c => 1);
var result = comparer.GetHashCode(null);
Assert.That(result, Is.EqualTo(0));
}
public void CanComputeHashOfClass()
{
var first = new ExampleClass();
var comparer = new DelegateEqualityComparer <ExampleClass>((c1, c2) => false, c => 1);
var result = comparer.GetHashCode(first);
Assert.That(result, Is.EqualTo(1));
}
public void GetHashCodeCallsTheProvidedDelegate()
{
var hashWasCalled = false;
Func<string, int> hash = (string obj) =>
{
hashWasCalled = true;
return 1;
};
var sut = new DelegateEqualityComparer<string>(this.defaultComparer, hash);
sut.GetHashCode("test");
Assert.True(hashWasCalled);
}
public void GetHashCode_()
{
var comparer = new DelegateEqualityComparer <int>((value1, value2) => value1 == value2, value => value);
Assert.Equal(1234, comparer.GetHashCode(1234));
}
