Mocking-모의 객체

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Mocking 객체
Bus Fake
Event Fake
- Scoped Event Fakes
Mail Fake
Notification Fake
Queue Fake
Storage Fake
파사드

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라라벨 애플리케이션을 테스팅할 때, 애플리케이션의 특정 부분을 "mock"하여 주어진 테스트가 진행될 때 실제로 실행되지 않도록 할 수 있습니다. 예를 들어 이벤트를 발생시키는 컨트롤러를 테스트 할 때, 이벤트 리스너가 테스트 중에 실제로 실행되지 않도록 mock할 수 있습니다. 이렇게하면 여러분은 이벤트 리스너는 자체 테스트 케이스에서 테스트 할 수 있고, 따라서 이벤트 리스너가 실행될것에 대한 걱정을 하지 않고, 컨트롤러의 HTTP response-응답만 테스트할 수 있습니다.

라라벨은 기본적으로 이벤트, job 그리고 파사드에 대한 mock 헬퍼를 제공합니다. 이 헬퍼들은 주로 Mockery에서 작동하는 편리한 레이어를 제공하고 있기 때문에, 수동으로 복잡한 Mockery 메소드를 호출할 필요가 없습니다. 여러분의 고유한 mock 이나 spy 객체를 만드는데 자유롭게 Mockery나 PHPUnit을 사용할 수 있습니다.

Mocking 객체

라라벨 서비스 컨테이너를 통하여 여러분의 애플리케이션에 주입되는 객체를 moking할 때에는, 컨테이너의 instance 바인딩을 사용해서 mocking한 인스턴스를 등록할 필요가 있습니다. 이는 컨테이너에 객체를 생성하는 대신에 mocking 된 객체를 사용하도록 알려줍니다.

use App\Service;
use Mockery;

$this->instance(Service::class, Mockery::mock(Service::class, function ($mock) {
    $mock->shouldReceive('process')->once();
}));

보다 편하게 사용하기 위해서, 라라벨의 기본 테스트 케이스 클래스가 제공하는 mock 메소드를 사용할 수도 있습니다.

use App\Service;

$this->mock(Service::class, function ($mock) {
    $mock->shouldReceive('process')->once();
});

객체의 몇 가지 메소드만 mocking해야 할 때 partialMock 메소드를 사용할 수 있습니다. mocking되지 않은 메소드는 다음과 같이 호출 될 때 정상적으로 실행됩니다.

use App\Service;

$this->partialMock(Service::class, function ($mock) {
    $mock->shouldReceive('process')->once();
});

비슷하게, 객체를 감시하고 싶다면 Laravel의 기본 테스트 케이스 클래스는 Mockery::spy 메소드를 둘러싼 편리한 래퍼로서 spy 메소드를 제공합니다.

use App\Service;

$this->spy(Service::class, function ($mock) {
    $mock->shouldHaveReceived('process');
});

Bus Fake

mocking하는 대신에, Bus 파사드의 fake 메소드를 사용하여 실제 job이 처리되는 것을 방지할 수 있습니다. fake를 사용하면, 테스트 대상 코드가 실행된 뒤에 검증이(assertions) 수행됩니다.

<?php

namespace Tests\Feature;

use App\Jobs\ShipOrder;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Support\Facades\Bus;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function testOrderShipping()
    {
        Bus::fake();

        // Perform order shipping...

        Bus::assertDispatched(ShipOrder::class, function ($job) use ($order) {
            return $job->order->id === $order->id;
        });

        // Assert a job was not dispatched...
        Bus::assertNotDispatched(AnotherJob::class);
    }
}

Event Fake

모든 이벤트 리스너가 실행되는걸 방지하기 위해서 mocking 을 사용하는 대신, Event 파사드의 fake 메소드를 사용할 수 있습니다. 여러분은 이벤트가 처리되었는지 확인하고 데이터가 수신되었는지에 대해서도 검사할 수 있습니다. fake를 사용하면, 테스트 대상 코드가 실행된 뒤에 검증이(assertions) 수행됩니다.

<?php

namespace Tests\Feature;

use App\Events\OrderFailedToShip;
use App\Events\OrderShipped;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Support\Facades\Event;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    /**
     * Test order shipping.
     */
    public function testOrderShipping()
    {
        Event::fake();

        // Perform order shipping...

        Event::assertDispatched(OrderShipped::class, function ($e) use ($order) {
            return $e->order->id === $order->id;
        });

        // Assert an event was dispatched twice...
        Event::assertDispatched(OrderShipped::class, 2);

        // Assert an event was not dispatched...
        Event::assertNotDispatched(OrderFailedToShip::class);
    }
}

{note} Event::fake()를 호출하면, 모든 이벤트 리스너가 실행되지 않게됩니다. 따라서 모델의 creating 이벤트 중에 UUID를 생성하는 것과 같이 이벤트에 의존하는 모델 팩토리를 사용하는 테스트의 경우에는, 팩토리를 사용한 다음에 Event::fake()를 호출해야 합니다.

이벤트의 일부를 Fake 시키기

특정 이벤트에 대한 이벤트 리스너만 fake로 만들고 싶다면, 그것들을 fake 또는 fakeFor 메소드에 전달할 수 있습니다.

/**
 * Test order process.
 */
public function testOrderProcess()
{
    Event::fake([
        OrderCreated::class,
    ]);

    $order = factory(Order::class)->create();

    Event::assertDispatched(OrderCreated::class);

    // Other events are dispatched as normal...
    $order->update([...]);
}

Scoped Event Fakes

테스트의 일부분 만 이벤트 리스너에게 fake 시키고 싶다면 fakeFor 메소드를 사용할 수 있습니다.

<?php

namespace Tests\Feature;

use App\Events\OrderCreated;
use App\Order;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Event;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    /**
     * Test order process.
     */
    public function testOrderProcess()
    {
        $order = Event::fakeFor(function () {
            $order = factory(Order::class)->create();

            Event::assertDispatched(OrderCreated::class);

            return $order;
        });

        // Events are dispatched as normal and observers will run ...
        $order->update([...]);
    }
}

Mail Fake

메일이 발송되는 것을 방지하기 위해서 Mail 파사드의 fake 메소드를 사용할 수 있습니다. 여러분은 mailable객체가 사용자에게 보내졌는지 확인하고 데이터가 수신되었는지에 대해서도 검사할 수 있습니다. fake를 사용하면, 테스트 대상 코드가 실행된 뒤에 검증이(assertions) 수행됩니다.

<?php

namespace Tests\Feature;

use App\Mail\OrderShipped;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Support\Facades\Mail;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function testOrderShipping()
    {
        Mail::fake();

        // Assert that no mailables were sent...
        Mail::assertNothingSent();

        // Perform order shipping...

        Mail::assertSent(OrderShipped::class, function ($mail) use ($order) {
            return $mail->order->id === $order->id;
        });

        // Assert a message was sent to the given users...
        Mail::assertSent(OrderShipped::class, function ($mail) use ($user) {
            return $mail->hasTo($user->email) &&
                   $mail->hasCc('...') &&
                   $mail->hasBcc('...');
        });

        // Assert a mailable was sent twice...
        Mail::assertSent(OrderShipped::class, 2);

        // Assert a mailable was not sent...
        Mail::assertNotSent(AnotherMailable::class);
    }
}

백그라운드에서 메일을 보내기 위해서 queue를 사용했다면, assertSent 대신에 assertQueued 메소드를 사요해야 합니다.

Mail::assertQueued(...);
Mail::assertNotQueued(...);

Notification Fake

알림이 발송되는 것을 방지하기 위해서 Notification 파사드의 fake 메소드를 사용할 수 있습니다. 여러분은 알림-notification이 사용자에게 보내졌는지 확인하고 데이터가 수신되었는지에 대해서도 검사할 수 있습니다. fake를 사용하면, 테스트 대상 코드가 실행된 뒤에 검증이(assertions) 수행됩니다.

<?php

namespace Tests\Feature;

use App\Notifications\OrderShipped;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Notifications\AnonymousNotifiable;
use Illuminate\Support\Facades\Notification;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function testOrderShipping()
    {
        Notification::fake();

        // Assert that no notifications were sent...
        Notification::assertNothingSent();

        // Perform order shipping...

        Notification::assertSentTo(
            $user,
            OrderShipped::class,
            function ($notification, $channels) use ($order) {
                return $notification->order->id === $order->id;
            }
        );

        // Assert a notification was sent to the given users...
        Notification::assertSentTo(
            [$user], OrderShipped::class
        );

        // Assert a notification was not sent...
        Notification::assertNotSentTo(
            [$user], AnotherNotification::class
        );

        // Assert a notification was sent via Notification::route() method...
        Notification::assertSentTo(
            new AnonymousNotifiable, OrderShipped::class
        );

        // Assert Notification::route() method sent notification to the correct user...
        Notification::assertSentTo(
            new AnonymousNotifiable,
            OrderShipped::class,
            function ($notification, $channels, $notifiable) use ($user) {
                return $notifiable->routes['mail'] === $user->email;
            }
        );
    }
}

Queue Fake

큐를 통해서 job이 실행되는 것을 방지하기 위해서 mocking 을 사용하는 대신, Queue 파사드의 fake 메소드를 사용할 수 있습니다. 여러분은 job이 큐에 추가되었는지 확인하고 데이터가 수신되었는지에 대해서도 검사할 수 있습니다. fake를 사용하면, 테스트 대상 코드가 실행된 뒤에 검증이(assertions) 수행됩니다.

<?php

namespace Tests\Feature;

use App\Jobs\ShipOrder;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Support\Facades\Queue;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function testOrderShipping()
    {
        Queue::fake();

        // Assert that no jobs were pushed...
        Queue::assertNothingPushed();

        // Perform order shipping...

        Queue::assertPushed(ShipOrder::class, function ($job) use ($order) {
            return $job->order->id === $order->id;
        });

        // Assert a job was pushed to a given queue...
        Queue::assertPushedOn('queue-name', ShipOrder::class);

        // Assert a job was pushed twice...
        Queue::assertPushed(ShipOrder::class, 2);

        // Assert a job was not pushed...
        Queue::assertNotPushed(AnotherJob::class);

        // Assert a job was pushed with a specific chain...
        Queue::assertPushedWithChain(ShipOrder::class, [
            AnotherJob::class,
            FinalJob::class
        ]);
    }
}

Storage Fake

Storage 파사드의 fake 메소드를 사용하면 UploadedFile 클래스의 파일 생성과 결합된 가짜 디스크를 생성할 수 있어, 파일 업로드 테스트가 아주 쉬워집니다. 예를 들면:

<?php

namespace Tests\Feature;

use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Storage;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function testAlbumUpload()
    {
        Storage::fake('photos');

        $response = $this->json('POST', '/photos', [
            UploadedFile::fake()->image('photo1.jpg'),
            UploadedFile::fake()->image('photo2.jpg')
        ]);

        // Assert one or more files were stored...
        Storage::disk('photos')->assertExists('photo1.jpg');
        Storage::disk('photos')->assertExists(['photo1.jpg', 'photo2.jpg']);

        // Assert one or more files were not stored...
        Storage::disk('photos')->assertMissing('missing.jpg');
        Storage::disk('photos')->assertMissing(['missing.jpg', 'non-existing.jpg']);
    }
}

{tip} 기본적으로, fake 메소드는 임시 디렉토리에 있는 모든 파일 삭제합니다. 이 파일들을 유지하고자 한다면, 대신 "persistentFake" 메소드를 사용하십시오.

파사드

전통적인 스태틱 메소드의 호출과 다르게, 파사드는 mock이 가능합니다. 이는 이전의 전통적인 스태틱 메소드와 대비해 훨씬 큰 이점을 제공하며 의존성 주입을 사용하는 경우와 동일한 테스트 가능성을 가질 수 있습니다. 테스트를 수행할 때 곧잘 컨트롤러 안에서의 파사드를 호출을 mock하고 싶을 것입니다. 예를 들어 다음의 컨트롤러 액션을 살펴보겠습니다.

<?php

namespace App\Http\Controllers;

use Illuminate\Support\Facades\Cache;

class UserController extends Controller
{
    /**
     * Show a list of all users of the application.
     *
     * @return Response
     */
    public function index()
    {
        $value = Cache::get('key');

        //
    }
}

Mockery mock을 돌려주는 인스턴스를 반환하는 shouldReceive 메소드를 사용하여 Cache 파사드 호출을 mock 할 수 있습니다. 파사드는 실제로 라라벨의 서비스 프로바이더에 의해서 의존성이 해결되기 때문에, 일반적인 스태틱 클래스보다 테스트가 용이합니다.

<?php

namespace Tests\Feature;

use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Support\Facades\Cache;
use Tests\TestCase;

class UserControllerTest extends TestCase
{
    public function testGetIndex()
    {
        Cache::shouldReceive('get')
                    ->once()
                    ->with('key')
                    ->andReturn('value');

        $response = $this->get('/users');

        // ...
    }
}

{note} 여러분은 Request 파사드를 mock 해서는 안됩니다. 대신에, 테스트를 실행할 때 여러분이 원하는 입력을 get 과 post 와 같은 HTTP 헬퍼 메소드에 전달하십시오. 마찬가지로, Config 파사드를 mocking 하는 대신에, 테스트에서 Config::set 메소드를 호출하십시오.

Mocking

Introduction
Mocking Objects
Bus Fake
Event Fake
- Scoped Event Fakes
Mail Fake
Notification Fake
Queue Fake
Storage Fake
Facades

Introduction

When testing Laravel applications, you may wish to "mock" certain aspects of your application so they are not actually executed during a given test. For example, when testing a controller that dispatches an event, you may wish to mock the event listeners so they are not actually executed during the test. This allows you to only test the controller's HTTP response without worrying about the execution of the event listeners, since the event listeners can be tested in their own test case.

Laravel provides helpers for mocking events, jobs, and facades out of the box. These helpers primarily provide a convenience layer over Mockery so you do not have to manually make complicated Mockery method calls. You can also use Mockery or PHPUnit to create your own mocks or spies.

Mocking Objects

When mocking an object that is going to be injected into your application via Laravel's service container, you will need to bind your mocked instance into the container as an instance binding. This will instruct the container to use your mocked instance of the object instead of constructing the object itself:

use App\Service;
use Mockery;

$this->instance(Service::class, Mockery::mock(Service::class, function ($mock) {
    $mock->shouldReceive('process')->once();
}));

In order to make this more convenient, you may use the mock method, which is provided by Laravel's base test case class:

use App\Service;

$this->mock(Service::class, function ($mock) {
    $mock->shouldReceive('process')->once();
});

You may use the partialMock method when you only need to mock a few methods of an object. The methods that are not mocked will be executed normally when called:

use App\Service;

$this->partialMock(Service::class, function ($mock) {
    $mock->shouldReceive('process')->once();
});

Similarly, if you want to spy on an object, Laravel's base test case class offers a spy method as a convenient wrapper around the Mockery::spy method:

use App\Service;

$this->spy(Service::class, function ($mock) {
    $mock->shouldHaveReceived('process');
});

Bus Fake

As an alternative to mocking, you may use the Bus facade's fake method to prevent jobs from being dispatched. When using fakes, assertions are made after the code under test is executed:

<?php

namespace Tests\Feature;

use App\Jobs\ShipOrder;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Support\Facades\Bus;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function testOrderShipping()
    {
        Bus::fake();

        // Perform order shipping...

        Bus::assertDispatched(ShipOrder::class, function ($job) use ($order) {
            return $job->order->id === $order->id;
        });

        // Assert a job was not dispatched...
        Bus::assertNotDispatched(AnotherJob::class);
    }
}

Event Fake

As an alternative to mocking, you may use the Event facade's fake method to prevent all event listeners from executing. You may then assert that events were dispatched and even inspect the data they received. When using fakes, assertions are made after the code under test is executed:

<?php

namespace Tests\Feature;

use App\Events\OrderFailedToShip;
use App\Events\OrderShipped;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Support\Facades\Event;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    /**
     * Test order shipping.
     */
    public function testOrderShipping()
    {
        Event::fake();

        // Perform order shipping...

        Event::assertDispatched(OrderShipped::class, function ($e) use ($order) {
            return $e->order->id === $order->id;
        });

        // Assert an event was dispatched twice...
        Event::assertDispatched(OrderShipped::class, 2);

        // Assert an event was not dispatched...
        Event::assertNotDispatched(OrderFailedToShip::class);
    }
}

{note} After calling Event::fake(), no event listeners will be executed. So, if your tests use model factories that rely on events, such as creating a UUID during a model's creating event, you should call Event::fake() after using your factories.

Faking A Subset Of Events

If you only want to fake event listeners for a specific set of events, you may pass them to the fake or fakeFor method:

/**
 * Test order process.
 */
public function testOrderProcess()
{
    Event::fake([
        OrderCreated::class,
    ]);

    $order = factory(Order::class)->create();

    Event::assertDispatched(OrderCreated::class);

    // Other events are dispatched as normal...
    $order->update([...]);
}

Scoped Event Fakes

If you only want to fake event listeners for a portion of your test, you may use the fakeFor method:

<?php

namespace Tests\Feature;

use App\Events\OrderCreated;
use App\Order;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Event;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    /**
     * Test order process.
     */
    public function testOrderProcess()
    {
        $order = Event::fakeFor(function () {
            $order = factory(Order::class)->create();

            Event::assertDispatched(OrderCreated::class);

            return $order;
        });

        // Events are dispatched as normal and observers will run ...
        $order->update([...]);
    }
}

Mail Fake

You may use the Mail facade's fake method to prevent mail from being sent. You may then assert that mailables were sent to users and even inspect the data they received. When using fakes, assertions are made after the code under test is executed:

<?php

namespace Tests\Feature;

use App\Mail\OrderShipped;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Support\Facades\Mail;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function testOrderShipping()
    {
        Mail::fake();

        // Assert that no mailables were sent...
        Mail::assertNothingSent();

        // Perform order shipping...

        Mail::assertSent(OrderShipped::class, function ($mail) use ($order) {
            return $mail->order->id === $order->id;
        });

        // Assert a message was sent to the given users...
        Mail::assertSent(OrderShipped::class, function ($mail) use ($user) {
            return $mail->hasTo($user->email) &&
                   $mail->hasCc('...') &&
                   $mail->hasBcc('...');
        });

        // Assert a mailable was sent twice...
        Mail::assertSent(OrderShipped::class, 2);

        // Assert a mailable was not sent...
        Mail::assertNotSent(AnotherMailable::class);
    }
}

If you are queueing mailables for delivery in the background, you should use the assertQueued method instead of assertSent:

Mail::assertQueued(...);
Mail::assertNotQueued(...);

Notification Fake

You may use the Notification facade's fake method to prevent notifications from being sent. You may then assert that notifications were sent to users and even inspect the data they received. When using fakes, assertions are made after the code under test is executed:

<?php

namespace Tests\Feature;

use App\Notifications\OrderShipped;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Notifications\AnonymousNotifiable;
use Illuminate\Support\Facades\Notification;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function testOrderShipping()
    {
        Notification::fake();

        // Assert that no notifications were sent...
        Notification::assertNothingSent();

        // Perform order shipping...

        Notification::assertSentTo(
            $user,
            OrderShipped::class,
            function ($notification, $channels) use ($order) {
                return $notification->order->id === $order->id;
            }
        );

        // Assert a notification was sent to the given users...
        Notification::assertSentTo(
            [$user], OrderShipped::class
        );

        // Assert a notification was not sent...
        Notification::assertNotSentTo(
            [$user], AnotherNotification::class
        );

        // Assert a notification was sent via Notification::route() method...
        Notification::assertSentTo(
            new AnonymousNotifiable, OrderShipped::class
        );

        // Assert Notification::route() method sent notification to the correct user...
        Notification::assertSentTo(
            new AnonymousNotifiable,
            OrderShipped::class,
            function ($notification, $channels, $notifiable) use ($user) {
                return $notifiable->routes['mail'] === $user->email;
            }
        );
    }
}

Queue Fake

As an alternative to mocking, you may use the Queue facade's fake method to prevent jobs from being queued. You may then assert that jobs were pushed to the queue and even inspect the data they received. When using fakes, assertions are made after the code under test is executed:

<?php

namespace Tests\Feature;

use App\Jobs\AnotherJob;
use App\Jobs\FinalJob;
use App\Jobs\ShipOrder;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Support\Facades\Queue;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function testOrderShipping()
    {
        Queue::fake();

        // Assert that no jobs were pushed...
        Queue::assertNothingPushed();

        // Perform order shipping...

        Queue::assertPushed(ShipOrder::class, function ($job) use ($order) {
            return $job->order->id === $order->id;
        });

        // Assert a job was pushed to a given queue...
        Queue::assertPushedOn('queue-name', ShipOrder::class);

        // Assert a job was pushed twice...
        Queue::assertPushed(ShipOrder::class, 2);

        // Assert a job was not pushed...
        Queue::assertNotPushed(AnotherJob::class);

        // Assert a job was pushed with a given chain of jobs, matching by class...
        Queue::assertPushedWithChain(ShipOrder::class, [
            AnotherJob::class,
            FinalJob::class
        ]);

        // Assert a job was pushed with a given chain of jobs, matching by both class and properties...
        Queue::assertPushedWithChain(ShipOrder::class, [
            new AnotherJob('foo'),
            new FinalJob('bar'),
        ]);

        // Assert a job was pushed without a chain of jobs...
        Queue::assertPushedWithoutChain(ShipOrder::class);
    }
}

Storage Fake

The Storage facade's fake method allows you to easily generate a fake disk that, combined with the file generation utilities of the UploadedFile class, greatly simplifies the testing of file uploads. For example:

<?php

namespace Tests\Feature;

use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Storage;
use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function testAlbumUpload()
    {
        Storage::fake('photos');

        $response = $this->json('POST', '/photos', [
            UploadedFile::fake()->image('photo1.jpg'),
            UploadedFile::fake()->image('photo2.jpg')
        ]);

        // Assert one or more files were stored...
        Storage::disk('photos')->assertExists('photo1.jpg');
        Storage::disk('photos')->assertExists(['photo1.jpg', 'photo2.jpg']);

        // Assert one or more files were not stored...
        Storage::disk('photos')->assertMissing('missing.jpg');
        Storage::disk('photos')->assertMissing(['missing.jpg', 'non-existing.jpg']);
    }
}

{tip} By default, the fake method will delete all files in its temporary directory. If you would like to keep these files, you may use the "persistentFake" method instead.

Facades

Unlike traditional static method calls, facades may be mocked. This provides a great advantage over traditional static methods and grants you the same testability you would have if you were using dependency injection. When testing, you may often want to mock a call to a Laravel facade in one of your controllers. For example, consider the following controller action:

<?php

namespace App\Http\Controllers;

use Illuminate\Support\Facades\Cache;

class UserController extends Controller
{
    /**
     * Show a list of all users of the application.
     *
     * @return Response
     */
    public function index()
    {
        $value = Cache::get('key');

        //
    }
}

We can mock the call to the Cache facade by using the shouldReceive method, which will return an instance of a Mockery mock. Since facades are actually resolved and managed by the Laravel service container, they have much more testability than a typical static class. For example, let's mock our call to the Cache facade's get method:

<?php

namespace Tests\Feature;

use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Support\Facades\Cache;
use Tests\TestCase;

class UserControllerTest extends TestCase
{
    public function testGetIndex()
    {
        Cache::shouldReceive('get')
                    ->once()
                    ->with('key')
                    ->andReturn('value');

        $response = $this->get('/users');

        // ...
    }
}

{note} You should not mock the Request facade. Instead, pass the input you desire into the HTTP helper methods such as get and post when running your test. Likewise, instead of mocking the Config facade, call the Config::set method in your tests.

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