错误：单元测试时无法实例化接口 symfony

Question

我正在尝试对注册方法进行单元测试，我正在关注此guide。我对单元测试相当陌生。

我一直在努力

1) App\Tests\Controller\SignUpControllerTest::testSignUp 错误：不能 实例化接口 Symfony\Component\Security\Core\Encoder\UserPasswordEncoderInterface

/Applications/MAMP/htdocs/my_project/tests/Controller/SignUpControllerTest.php:19

我只是不认为我做这个单元测试是正确的。这就是我所拥有的。我不确定我在做什么。我要做的就是测试注册方法。

UserController.php

public function signup(Request $request, UserPasswordEncoderInterface $passwordEncoder )
{
    $user = new User();

    $entityManager = $this->getDoctrine()->getManager();

    $user->setEmail($request->get('email'));
    $user->setPlainPassword($request->get('password'));
    $user->setUsername($request->get('username'));
    $password = $passwordEncoder->encodePassword($user, $user->getPlainPassword());
    $user->setPassword($password);

    $entityManager->persist($user);
    $entityManager->flush();

    return $this->redirectToRoute('login');



}

SignUpControllerTest.php

namespace App\Tests\Controller;

use App\Entity\Product;
use App\Controller\UserController;
use App\Entity\User;
use Doctrine\Common\Persistence\ObjectManager;
use Doctrine\Common\Persistence\ObjectRepository;
use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
use Symfony\Component\Security\Core\Encoder\UserPasswordEncoderInterface;
use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;

class SignUpControllerTest extends WebTestCase
{

    public function testSignUp()
    {   
        $passwordEncoder = new UserPasswordEncoderInterface();
        $user = new User();
        $user->setEmail('janedoe123@aol.com');
        $user->setPlainPassword('owlhunter');
        $user->setUsername('BarnMan');
        $password = $passwordEncoder->encodePassword($user, $user->getPlainPassword());
        $user->setPassword($password);

        $userRepository = $this->createMock(ObjectRepository::class);
        $userRepository->expects($this->any())
            ->method('find')
            ->willReturn($user);


        $objectManager = $this->createMock(ObjectManager::class);
        // use getMock() on PHPUnit 5.3 or below
        // $objectManager = $this->getMock(ObjectManager::class);
        $objectManager->expects($this->any())
            ->method('getRepository')
            ->willReturn($userRepository);

        $userController = new UserController($objectManager);
        $this->assertEquals(2100, $userController->signupTest());

    }


}

Answer 1

错误很明显。在 testSignUp 方法的第一行中，您正在从接口中创建一个实例，而这在 PHP 中是无法完成的。

要在单元测试中从接口创建可用对象，请创建它的模拟对象。阅读 PHP 单元文档。

Answer 2

WebTestCase：

应用程序测试是 PHP 文件，通常位于应用程序的 tests/Controller/ 目录中，它告诉 Symfony 我们需要必要的工具来与我们的应用程序通信，就好像我们通过 HTTP 进行通信一样。

内核测试

用于从依赖注入容器中获取服务，它可以帮助您在测试中创建和启动内核

这就是我推荐你使用 KernelTestCase 的原因

use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;

class SignUpControllerTest extends KernelTestCase
{
private $passwordEncoder;

protected function testSignUp(): void
{
   self::bootKernel();
    $this->passwordEncoder= self::getContainer()->get('Symfony\Component\Security\Core\Encoder\UserPasswordEncoderInterface');
}

public function addShoes3()
{
     $passwordEncoder = $this->passwordEncoder;
    //continue
}
}