public void FindFirstNonMatchingNumber_ReturnsNonMatchingNumber(string input, int preamble, long expected)
        {
            //arrange
            var dayNine = new DayNineSolution(input, preamble);

            //act
            var actual = dayNine.FindFirstNonMatchingNumber();

            //assert
            Assert.Equal(expected, actual);
        }
        public void FindEncryptionWeakness_ReturnsEcryptionWeakness(string input, int preamble, long expected)
        {
            //arrange
            var dayNine = new DayNineSolution(input, preamble);

            //act
            var actual = dayNine.FindEncryptionWeakness();

            //assert
            Assert.Equal(expected, actual);
        }