/**
  * @test
  */
 public function addFieldFailure()
 {
     $validator = new ValidatorService();
     $key = 'email';
     $message = 'this thing failed validation';
     $validator->setRule($key, 'E-Mail', 'required|isEmail')->addFieldFailure($key, $message);
     $error_array = $validator->getAllFieldErrorMessages();
     $this->assertArrayHasKey($key, $error_array);
     $this->assertEquals($message, $error_array[$key]);
     $this->assertContains($message, $validator->getAllFieldErrorMessagesString());
 }