How to functionally test the console command input validator

I want to functionally test Symfony command

I am building. I am using a helper class Question

by linking a personal validator

:

    $helper = $this->getHelper('question');
    $question = new Question('Enter a valid IP: ');
    $question->setValidator($domainValidator);
    $question->setMaxAttempts(2);

      

        
        
        
      

    

those tests I am running are functional, so to mock the interoperability I added something like the following to my PHPUnit test class. Here's an excerpt:

public function testBadIpRaisesError()
{
            $question = $this->createMock('Symfony\Component\Console\Helper\QuestionHelper');
            $question
                ->method('ask')
                ->will($this->onConsecutiveCalls(
                    '<IP>',
                    true
                ));
    ...
}

protected function createMock($originalClassName)
{
    return $this->getMockBuilder($originalClassName)
                ->disableOriginalConstructor()
                ->disableOriginalClone()
                ->disableArgumentCloning()
                ->disallowMockingUnknownTypes()
                ->getMock();
}

      

        
        
        
      

    

Of course, this mock is more than okay when I'm testing something that is outside the scope of the helper Question

, but in this case what I would like to do is test everything to make sure the validator is well written.

What's the best option in this case? Unit testing my validator is ok, but I would like to functionally test it as a black box from a user perspective