public void CheckNegativeNumberTest_NegativeNumber_ReturnFalse()
        {
            DataValidation dataValidation = new DataValidation();
            bool           factResult;
            int            number = -15;

            factResult = dataValidation.CheckNegativeNumber(number);
            Assert.IsFalse(factResult);
        }
        public void CheckNegativeNumberTest_PositiveNumber_ReturnTrue()
        {
            DataValidation dataValidation = new DataValidation();
            bool           factResult;
            int            number = 5;

            factResult = dataValidation.CheckNegativeNumber(number);
            Assert.IsTrue(factResult);
        }