public void Contains_1Point() { IIntegerList list = new IntegerList(); list.Add(11); list.Add(22); list.Add(33); Assert.IsTrue(list.Contains(33)); Assert.IsTrue(list.Contains(22)); Assert.IsTrue(list.Contains(11)); Assert.IsFalse(list.Contains(44)); list.Clear(); Assert.IsFalse(list.Contains(33)); }