public void Includes_NotAllItemsFromSubsetAreInTheSuperset_ReturnsFalse()
        {
            char[] superset = new[] {'a', 'b', 'c'};
            char[] subset = new[] {'b', 'c', 'd'};

            bool actual = superset.Includes(subset);

            Assert.False(actual);
        }
        public void Includes_AllSubsetElementsExistInSuperset_ReturnsTrue()
        {
            char[] superset = new[] {'a', 'b', 'c'};
            char[] subset = new[] {'b', 'c'};

            bool actual = superset.Includes(subset);

            Assert.True(actual);
        }