嘲弄->；shouldReceive(）在不应该的时候传递

我正在学习使用phpunit和mock在laravel中进行单元测试。我目前正在尝试测试UsersController:：store（）。

我正在嘲笑用户模型，并用它来测试索引方法，这似乎很有效。当我取出$this->user->all（）时，测试失败，当它通过时。

在测试存储方法时，我使用mock来测试用户模型是否接收validate（）一次。存储方法为空，但测试通过。为了简洁起见，我省略了类中不相关的部分

<?php
class UsersController extends BaseController {
    public function __construct(User $user)
    {
        $this->user = $user;
    }
    /**
     * Display a listing of the resource.
     *
     * @return Response
     */
    public function index()
    {
        $users = $this->user->all();
        return View::make('users.index')
        ->with('users', $users);
    }
    /**
     * Show the form for creating a new resource.
     *
     * @return Response
     */
    public function create()
    {
        return View::make('users.create');
    }
    /**
     * Store a newly created resource in storage.
     *
     * @return Response
     */
    public function store()
    {
        //
    }
}

UserControllerTest.php

<?php
    use Mockery as m;
class UserControllerTest extends TestCase {
    public function __construct()
    {
        $this->mock = m::mock('BaseModel', 'User');
    }
    public function tearDown()
    {
        m::close();
    }
    public function testIndex()
    {
        $this->mock
            ->shouldReceive('all')
            ->once()
            ->andReturn('All Users');
        $this->app->instance('User', $this->mock);
        $this->call('GET', 'users');
        $this->assertViewHas('users', 'All Users');
    }
    public function testCreate()
    {
        View::shouldReceive('make')->once();
        $this->call('GET', 'users/create');
        $this->assertResponseOk();
    }
    public function testStore()
    {
        $this->mock
            ->shouldReceive('validate')
            ->once()
            ->andReturn(m::mock(['passes' => 'true']));
        $this->app->instance('User', $this->mock);
        $this->call('POST', 'users');
    }

}