public void WhenTestingForInvalidInput_WithMoreThanTwoCentsDigits_ShoudReturnFalse()
        {
            var input = "7,777";

            var success = ConvertCommandHelper.IsValidInputFormat(input);

            Assert.IsFalse(success);
        }
        public void WhenTestingForInvalidInput_WithGreaterThanMaximum_ShoudReturnFalse()
        {
            var input = "9999999999,99";

            var success = ConvertCommandHelper.IsValidInputFormat(input);

            Assert.IsFalse(success);
        }
        public void WhenTestingForInvalidInput_WithoutDollarsDigits_ShoudReturnFalse()
        {
            var input = ",99";

            var success = ConvertCommandHelper.IsValidInputFormat(input);

            Assert.IsFalse(success);
        }
        public void WhenTestingForValidInput_WithGreatestNumberWithComma_ShoudReturnTrue()
        {
            var input = "999999999,99";

            var success = ConvertCommandHelper.IsValidInputFormat(input);

            Assert.IsTrue(success);
        }