public void ValidatePlayAgainAccurateInputTest()
        {
            string        invalidInput = "N";
            bool          expected     = true;
            ValidateInput validInput   = new ValidateInput();
            bool          actual       = validInput.ValidateYesNoInput(invalidInput);

            Assert.Equal(expected, actual);
        }
        public void ValidatePlayAgainWrongInputTest()
        {
            string        invalidInput = "K";
            bool          expected     = false;
            ValidateInput validInput   = new ValidateInput();
            bool          actual       = validInput.ValidateYesNoInput(invalidInput);

            Assert.Equal(expected, actual);
        }