public function testControl()
 {
     $form = new Form();
     $recaptcha = $form->addRecaptcha('recaptcha');
     $recaptcha->setApiKey('api');
     $recaptcha->setSecretKey('secret');
     $this->assertSame('api', $recaptcha->getApiKey());
     $this->assertNotEmpty($recaptcha->getControl());
 }