Laravel 5.2 带有 Mocking 的单元测试存储库“没有方法”

Question

在 Laravel 5.2 中，我想对我的 Eloquent 用户存储库进行单元测试。

class EloquentUserRepository implements UserRepositoryInterface
{
    private $user;

    public function __construct(User $user)
    {
        $this->user = $user;
    }

    public function oneUser($id)
    {
        return $this->user->oneUser($id);
    }
}

我的测试如下所示，模拟界面：

class EloquentUserRepositoryTest extends TestCase
{
    public function setUp()
    {
        $this->user = factory(User::class, 1)->create(['name' => 'foo']);
    }

    /** @test */
    public function it_fetch_an_user()
    {

        $mock = Mockery::mock('App\Repositories\Interfaces\UserRepositoryInterface')
        ->shouldReceive('oneUser')
        ->once()
        ->with($this->user->id)
        ->andReturn('foo');

        App::instance(App\Repositories\EloquentUserRepository::class, $mock);
        $userRepository = App::make(App\Repositories\EloquentUserRepository::class);

        $this->assertEquals('foo', $userRepository->oneUser($this->user->id)->name);

    }

    public function tearDown()
    {
        Mockery::close();
    }
}

我收到此错误：

ErrorException: call_user_func_array() expects parameter 1 to be a valid callback, class 'Mockery\Expectation' does not have a method 'oneUser'

我期望一个具有 oneUser 方法的模拟对象，但它返回 Mockery\Expectation。我哪里错了？

Answer 1

当创建 EloquentUserRepository 的新实例时，会创建一个新的用户模型。然后，当您为 EloquentUserRepository 类调用 oneUser 方法时，会调用一个具有相同名称但在用户模型上的方法。因此，您需要模拟的是用户模型，而不是 UserRepositoryInterface。

您需要创建 EloquentUserRepository 的新实例，并在创建时将用户模型模拟作为参数发送，如下所示：

class EloquentUserRepositoryTest extends TestCase
{
    protected $userMock;

    public function setUp()
    {
        parent::setUp();

        $this->userMock = Mockery::mock('User');
        $this->userMock->id = 1;
    }

    /** @test */
    public function it_fetch_an_user()
    {
        $this->userMock->shouldReceive('oneUser')->with($this->userMock->id)->andReturn('foo');

        $userRepository = App::make(App\Repositories\EloquentUserRepository::class, array($this->userMock));

        $this->assertEquals('foo', $userRepository->oneUser($this->userMock->id));
    }

    public function tearDown()
    {
        Mockery::close();
    }
}