public void Test_Contains()
        {
            var hash = new SeparateChainHash <Byte, Char>();

            hash.Add(1, 'A');
            hash.Add(2, 'B');

            Assert.True(hash.Contains(1));
            Assert.True(hash.Contains(2));
        }
        public void Test_Delete()
        {
            var hash = new SeparateChainHash <Byte, Char>();

            hash.Add(1, 'A');
            hash.Delete(1);

            Assert.False(hash.Contains(1));
        }