public void SumNumbersCorrectly_GivenNumbersUpTo1000(int expected, string input)
        {
            int result = Calculator.Add(input);

            Assert.Equal(expected, result);
        }
        public void IgnoreNumbersAbove1000(int expected, string input)
        {
            int result = Calculator.Add(input);

            Assert.Equal(expected, result);
        }
        public void Return0_GivenEmptyString()
        {
            int result = Calculator.Add("");

            Assert.Equal(0, result);
        }
        public void ReturnSumOfNumbers_GivenCustomDelimitedNumbers(int expected, string input)
        {
            int result = Calculator.Add(input);

            Assert.Equal(expected, result);
        }
        public void ReturnSumOfNumbers_GivenNewLineSeparators(int expected, string input)
        {
            int result = Calculator.Add(input);

            Assert.Equal(expected, result);
        }
        public void ReturnSumOfNumbers_GivenMoreThanTwoNumbers(int expected, string input)
        {
            int result = Calculator.Add(input);

            Assert.Equal(expected, result);
        }
        public void ReturnTheNumber_GivenSingleNumberString(int expected, string input)
        {
            int result = Calculator.Add(input);

            Assert.Equal(expected, result);
        }
        public void AllowMulticharacterDelimiters_GivenSquareBraces(int expected, string input)
        {
            int result = Calculator.Add(input);

            Assert.Equal(expected, result);
        }