public void T2()
        {
            // Arrange
            var testValidationRule = new CanBeEmptyPositiveNumberValidationRule();

            // Act
            var actual = testValidationRule.Validate("test string", InvariantCulture);

            // Assert
            Assert.Equal(new ValidationResult(false, "Value must be a number"), actual);
        }
        public void T1()
        {
            // Arrange
            var testValidationRule = new CanBeEmptyPositiveNumberValidationRule();

            // Act
            var actual = testValidationRule.Validate(string.Empty, InvariantCulture);

            // Assert
            Assert.Equal(ValidationResult.ValidResult, actual);
        }