public void Should_ReturnNumberOfValidNumbersCorrectly(string expected, string input)
        {
            _streamReader =
                StreamHelper.GetStream(input);

            var result = new FourPointFive().Run(_streamReader);

            Assert.Equal(expected, result);
        }
        public void Should_ComputeIfNumberIsValidCorrectly(bool expected, int number)
        {
            var result = new FourPointFive().IsValid(number);

            Assert.Equal(expected, result);
        }