Unit testing 错误单元测试symfony

当我尝试执行这个单元测试时 我有个问题 这就是我的功能测试错误

    public function testErrors(){

    $client = static::createClient();

    $crawler = $client->request('GET', '/add');
    $form = $crawler->selectButton('save')->form(array(
    'user[firstName]'      => 'test1',
    'user[lastName]'       => 'test',
    'user[email]'          => 'test@gmail.com',
    ));
    $crawler = $client->submit($form);

    //  3 errors
    $this->assertTrue($crawler->filter('.error_list')->count() == 3);
    // Error firstName field
    $this->assertTrue($crawler->filter('#firstName')->siblings()->first()->filter('.error_list')->count() == 1);
    // Error lasName field
    $this->assertTrue($crawler->filter('#lastName')->siblings()->first()->filter('.error_list')->count() == 1);
    // Error email field
    $this->assertTrue($crawler->filter('#email')->siblings()->first()->filter('.error_list')->count() == 1);

}

我有这个问题

InvalidArgumentException:当前节点列表为空

    public function testErrors(){

    $client = static::createClient();

    $crawler = $client->request('GET', '/add');
    $form = $crawler->selectButton('save')->form(array(
    'user[firstName]'      => 'test1',
    'user[lastName]'       => 'test',
    'user[email]'          => 'test@gmail.com',
    ));
    $crawler = $client->submit($form);

    //  3 errors
    $this->assertTrue($crawler->filter('.error_list')->count() == 3);
    // Error firstName field
    $this->assertTrue($crawler->filter('#firstName')->siblings()->first()->filter('.error_list')->count() == 1);
    // Error lasName field
    $this->assertTrue($crawler->filter('#lastName')->siblings()->first()->filter('.error_list')->count() == 1);
    // Error email field
    $this->assertTrue($crawler->filter('#email')->siblings()->first()->filter('.error_list')->count() == 1);

}

这是我的控制器

   /**
 * @Route("/add", name="addPage")
 */
public function AddAction(Request $request)
{

    $user = new User();

    $form = $this->createFormBuilder($user)
        ->add('email', TextType::class)
        ->add('firstName', TextType::class)
        ->add('lastName', TextType::class)
        ->add('save', SubmitType::class, array('label' => 'Add'))
        ->getForm();


    $form->handleRequest($request);

    if ($form->isSubmitted() && $form->isValid()) {


    $firstName = $form['firstName']->getData();
    $lastName = $form['lastName']->getData();
    $email = $form['email']->getData();
    $user->setFirstName($firstName);
    $user->setLastName($lastName);
    $user->setEmail($email);
    $em = $this->getDoctrine()->getManager();
    $em->persist($user);
    $em->flush();
    $this->addFlash('notice','user added' );
    return $this->redirectToRoute('listPage');
    }

---

我认为是您的

selectButton（'save'）

导致了错误。尝试使用按钮标签

Add

而不是

save

哪个语句/行出现此错误？以及为什么在没有任何约束的情况下希望表单得到3个验证错误？此行中的错误“）；“”因此在这条语句中，$form=$crawler->selectButton（'save'）->form（数组（'user[firstName]'=>'test1'，'user[lastName]'=>'test'，'user[email]'=>'test@gmail.com', ));在访问爬虫程序之前，我将为fields添加一个约束，检查请求是否正常，比如

$this->assertTrue（$client->getResponse（）->issusccessful（））在
客户端->请求之后
在哪一行？让我们尝试将语句分开，以跟踪如下错误：``$button=$crawler->selectButton（'Add'）$form=$button->form（）$form->get（'form[firstName]'）->setValue（'test1'）$form->get（'form[lastName]'）->setValue（'test'）$表单->获取（'表单[电子邮件]）->设置值（'test@gmail.com'); ``` 另外，我使用“form”作为字段名选择器，因为对我来说，这就是它呈现表单的方式。