Laravel - 如何使用 mockery 对更新用户数据的中间件进行单元测试

Question

我有以下中间件来更新用户的 last_seen_at 字段，我只将它用于经过身份验证的用户可以调用它的路由：

// app/Http/Middleware/LastSeen.php

public function handle($request, Closure $next)
{
    $user = $request->user();

    $user->last_seen_at = now();

    $user->save();

    return $next($request);
}

// app/Http/Kernel.php

protected $routeMiddleware = [
    // other middleware
    'lastseen' => \App\Http\Middleware\LastSeen::class
]

// routes/api.php

Route::group([
    'middleware' => ['jwt', 'lastseen']
], function () {
    // routes
});

我为测试中间件编写了以下单元测试：

// tests/Unit/LastSeenMiddlewareTest.php

/** @test */
public function doesLastSeenMiddlewareUpdateUsersLastSeenAt()
{
    $user = Mockery::mock(User::class);

    $user->shouldReceive('setAttribute')->passthru();
    $user->shouldReceive('save')->once();

    $user = $user->makePartial();

    app()->instance(User::class, $user);

    $request = Mockery::mock(Request::class)
        ->shouldReceive('user')
        ->once()
        ->andReturn()
        ->getMock();

    $middleware = new LastSeen;

    $middleware->handle($request, function () {});
}

通过运行测试，我得到一个错误：ErrorException: Creating default object from empty value。但是，我不明白这个问题能够解决它。

Answer 1

好吧，这个问题从一开始就很愚蠢。我错过了传递$user 作为模拟Request 的user 方法的返回值。以下测试通过：

// tests/Unit/LastSeenMiddlewareTest.php

/** @test */
public function doesLastSeenMiddlewareUpdateUsersLastSeenAt()
{
    $user = Mockery::mock(User::class);

    /* As I'm making a partial mock,
       I don't need to worry about passing
       through the call to the setAttribute method */

    $user->shouldReceive('save')->once();

    $user = $user->makePartial();

    app()->instance(User::class, $user);

    $request = Mockery::mock(Request::class)
        ->shouldReceive('user')
        ->once()
        ->andReturn($user) // I should've passed $user here
        ->getMock();

    $middleware = new LastSeen;

    $middleware->handle($request, function () {});

    $this->assertEqualsWithDelta($user->last_seen_at, now(), 1);
}

Answer 2

归根结底，middlaware 只是带有 handle 方法的经典 class。
我将像这样进行单元测试：

  public function doesLastSeenMiddlewareUpdateUsersLastSeenAt()
    {
        //note: this is using the old factory syntax prior to Laravel 8 https://github.com/laravel/legacy-factories
        $user = factory(User::class)->create(['last_seen_at' => now()->subHour()]);
        
        //login as the user since in your middleware you get the logged user
        $this->actingAs($user);
        
        //get the middleware through the container
        $middleware = app(LastSeen::class);
        
        //call handle method
        $middleware->handle(request(),  function () {});
        $this->assertEqualsWithDelta($user->refresh()->last_seen_at, now(), 1);
    }