public void DifferentNonNullReferencesReturnNull()
{
// Just to be extra careful, make two different references to equal strings.
// That way we know we're not actually doing comparisons!
string x1 = new string(new [] { 'x' });
string x2 = new string(new [] { 'x' });
Assert.AreNotSame(x1, x2);
Assert.IsNull(PartialComparer.ReferenceCompare(x1, x2));
}
public void NonNullGreaterThanNull()
{
Assert.AreEqual(1, PartialComparer.ReferenceCompare("x", null).Value);
}
public void TwoNullReferencesReturnZero()
{
Assert.AreEqual(0, PartialComparer.ReferenceCompare <string>(null, null).Value);
}
public void NullLessThanNonNull()
{
Assert.AreEqual(-1, PartialComparer.ReferenceCompare(null, "x").Value);
}
public void EqualNonNullReferencesReturnZero()
{
Assert.AreEqual(0, PartialComparer.ReferenceCompare("x", "x").Value);
}