使用phpunit和Mockery模擬Laravel 5.2本地范圍

Question

我正在使用Laravel 5.2，phpunit 5.0.0和PHP 7.0.3，並嘗試使用數據庫交互編寫測試，該測試涉及Eloquent模型范圍方法。

我有類似的東西：

class Picture extends Illuminate\Database\Eloquent\Model {
    ...
    public function scopeGetPictureNameById($oQuery, $pictureHId) {
         return $oQuery->select('name')->where('h_id', '=',   $pictureHId)->first()->name;
    }
}

class someHelperClass {
    public function someMethod($pictureId) {
        $pictureName = Picture::getPictureNameById($pictureId);
        return "name is " . $pictureName;
    }
}


class SomeTest extends TestCase {

    use DatabaseMigrations;

    protected $someHelper;

    public function setUp() {
        parent::setUp();
        $this->someHelper = new SomeHelper();
    }

    /**
     * @test
     */
    public function someMethodTest() {
        $expectedName = "test";
        $this->assertEquals("name is " . $expectedName, $this->someHelper->someMethod());
    }
}

我使用Picture記錄為數據庫播種，其中名稱設置為“test”。

我想的第一件事是我不必模擬范圍調用，因為我需要的只是在數據庫中。 並且由於（非簡化的）代碼我在測試之外工作，我猜范圍調用在phpunit中不起作用。 （我得到了“試圖獲取非對象屬性”的例外）。

好的，所以我試着用Mockery來模擬這個電話：

class SomeTest extends TestCase {

    use DatabaseMigrations;

    protected $someHelper;

    public function setUp() {
        parent::setUp();
        $this->someHelper = new SomeHelper();
    }

    /**
     * @test
     */
    public function someMethodTest() {
        $expectedName = "test";

        $mockedPicture = Mockery::mock('overload:App\Models\Picture');
        $mockedPicture->shouldReceive('getPictureNameById')->andReturn('test');

        //also tried this: $mockedPicture->shouldReceive('scopeGetPictureNameById')->andReturn('test');


        $this->assertEquals("name is " . $expectedName, $this->someHelper->someMethod());
    }
}

我得到的是“無法加載模擬App \\ Models \\ Picture，類已經存在”。 那么我怎樣才能正確模擬查詢范圍調用，如Picture :: getPictureNameById（$ pictureId）？

Answer 1

我會使用依賴注入而不是靜態地調用Picture類上的方法。 所以像這樣：

class someHelperClass {

    protected $picture;

    public function __construct(Picture $picture) {
        $this->picture = $picture;
    }

    public function someMethod($pictureId) {
        $pictureName = $this->picture->getPictureNameById($pictureId);
        return "name is " . $pictureName;
    }
}

然后在你的測試中：

public function someMethodTest() {
    $expectedName = "test";

    $mockedPicture = Mockery::mock('App\Models\Picture');
    $mockedPicture->shouldReceive('getPictureNameById')->andReturn('test');
    $someHelper = new SomeHelper($mockedPicture);

    $this->assertEquals("name is " . $expectedName, $someHelper->someMethod(1));
}