public void TestIsSupersetOf() { var a = new RedBlackSetTester<int>(); Assert.That(() => a.IsSupersetOf(null), Throws.InstanceOf<ArgumentNullException>()); Assert.That(a.IsSupersetOf(Enumerable.Empty<int>())); Assert.That(a.IsSupersetOf(Enumerable.Range(1, 1)), Is.False); a.AddRange(_odd); Assert.That(a.IsSupersetOf(_primes), Is.False); a.Add(2); Assert.That(a.IsSupersetOf(_primes)); }