public void ShouldBeInvalidIfInvalidMacAddress(string value)
            {
                // Arrange
                var validator = new MacAddressValidator();

                // Act
                validator.Validate(value);

                // Assert
                validator.IsInvalid.ShouldBe(true);
            }
            public void ShouldBeDirtyOnceValidated()
            {
                // Arrange
                string value     = "Test";
                var    validator = new MacAddressValidator();

                // Act
                validator.Validate(value);

                // Assert
                validator.IsDirty.ShouldBe(true);
            }