/**
  * @test
  */
 public function shouldBeInvalid()
 {
     $validator = new ProcessValidator(function () {
         return false;
     });
     $this->assertTrue(!$validator->isValid());
 }
 /**
  * @test
  */
 public function shouldBeInvalid()
 {
     $validator = new ProcessValidator('An error occurred.', null, function () {
         return false;
     });
     $this->assertTrue(!$validator->isValid());
 }