public void TurnNumberToWord(int input, string output)
        {
            var abc      = new InterviewPreparation();
            var expected = abc.TurnNumberToWord(input);

            Assert.True(expected == output);
        }
        public void FormIntegerFromDigits_ShouldReturnCorrectly(int[] input, int output)
        {
            var abc      = new InterviewPreparation();
            var expected = abc.FormIntegerFromDigits(input);

            Assert.True(expected == output);
        }
        public void ConvertNumberToDigits_ShouldProduceDigitsArray(int input, int[] output)
        {
            var abc      = new InterviewPreparation();
            var expected = abc.ConvertNumberToDigits(input);

            Assert.True(expected.SequenceEqual(output));
        }
        // [InlineData(1234, "one thousand two hundred thirty four")]
        // [InlineData(1234, "one thousand two hundred thirty four")]
        public void Turn3digitsIntegerIntoWord_ShouldReturnCorrectWordRepresentation(int input, string output)
        {
            //arrange
            var abc = new InterviewPreparation();
            //act
            var expected = abc.Turn3digitsIntegerIntoWord(input);

            //assert
            Assert.True(expected == output);
        }
        public void digitCount_ShouldReturnCorrectDigits(int input, int output)
        {
            //arrange
            var abc = new InterviewPreparation();
            //act
            var expected = abc.digitCount(input);

            //assert
            Assert.True(expected == output);
        }
        public void ReverseString_shouldReturnCorrectString(string input, string output)
        {
            //arrange
            var abc = new InterviewPreparation();
            //act
            var expected = abc.ReverseString(input);

            //assert
            Assert.True(expected == output);
        }