public void ZeroHasher_ReturnsZero()
{
var spy = new EqualitySpy();
Assert.That(Hasher.Zero(spy), Is.EqualTo(0));
Assert.That(spy.GetHashCodeCalled, Is.False);
}
public void DefaultHasher_NotNull_InvokedGetHashCodeOnObject()
{
var spy = new EqualitySpy();
Hasher.Default(spy);
Assert.That(spy.GetHashCodeCalled, Is.True);
}
public void Equals_OneNullArgument_EqualsPredicateInvocationNotNeeded(string first, string second)
{
var spy = new EqualitySpy();
Func <string, string, bool> equal = spy.GetEquals <string>(true);
IEqualityComparer <string> subject = new DelegatedEqualizer <string>(equal, Hasher.Zero);
subject.Equals(first, second);
Assert.That(spy.EqualsCalled, Is.False);
}
public void Equals_BothNull_EqualsPredicateInvocationNotNeeded()
{
var spy = new EqualitySpy();
Func <string, string, bool> notEqual = spy.GetEquals <string>(false);
IEqualityComparer <string> subject = new DelegatedEqualizer <string>(notEqual, Hasher.Zero);
subject.Equals(null, null);
Assert.That(spy.EqualsCalled, Is.False);
}
public void Ctor_Comparer()
{
var spy = new EqualitySpy();
var subject = new DelegatedEqualizer <int>(
spy.GetComparer <int>(-1),
spy.GetHashCode <int>(42));
Assert.That(subject.Equals(1, 1), Is.False);
Assert.That(spy.EqualsCalled, Is.True);
Assert.That(subject.GetHashCode(1), Is.EqualTo(42));
Assert.That(spy.GetHashCodeCalled, Is.True);
}