public void CanCombineSpecificationsUsingXor()
{
Specification <string> isLowercase = new IsLowercaseSpecification();
Specification <string> startsWithF = new StartsWithFSpecification();
Assert.IsFalse(isLowercase.Xor(startsWithF).IsSatisfiedBy("foo"), "foo (both)");
Assert.IsTrue(isLowercase.Xor(startsWithF).IsSatisfiedBy("fl4M1ng0"), "fl4M1ng0 (starts with f)");
Assert.IsTrue(isLowercase.Xor(startsWithF).IsSatisfiedBy("bar"), "bar (lowercase)");
Assert.IsFalse(isLowercase.Xor(startsWithF).IsSatisfiedBy("Bassoon"), "Bassoon (neither)");
}
public void CanFilterByNotSpecification()
{
Specification <string> isLowercase = new IsLowercaseSpecification();
Specification <string> isNotJustLowercase = new NotSpecification <string>(isLowercase);
Assert.IsTrue(isLowercase.IsSatisfiedBy("foo"));
Assert.IsFalse(isLowercase.IsSatisfiedBy("Bar"));
Assert.IsFalse(isNotJustLowercase.IsSatisfiedBy("foo"));
Assert.IsTrue(isNotJustLowercase.IsSatisfiedBy("Bar"));
}
