问题模拟 Laravel 可引导模型特征

Question

我正在使用 bootable model trait 为使用我的 Trait 的模型注册某些事件。但是，我在尝试模拟使用该特征的模型时遇到了问题。具体来说，当一个 Mockery 版本的模型被实例化时，它的启动代码同意它应该有一个 bootMyTrait 方法，但是当它试图调用它时却找不到它。

Sample Repository 用于以下内容，带有要重现的命令。

举个例子，这里有一个特质：

namespace App;
trait MyTrait
{
    public static function bootMyTrait()
    {
        print("Booting MyTrait\n");
    }
}

还有一个使用它的模型：

namespace App;
use Illuminate\Database\Eloquent\Model;
class MyModel extends Model
{
    use MyTrait;
}

定期实例化模型可以正常工作。这显示了所需的输出：

$model = new MyModel();

但是，试图模拟这个模型是不合作的。这个：

use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Foundation\Testing\DatabaseMigrations;
use Illuminate\Foundation\Testing\DatabaseTransactions;


    class ExampleTest extends TestCase
    {
        /**
         * A basic functional test example.
         *
         * @return void
         */
        public function testTraitBooting()
        {
            $model = $this->getMock('App\MyModel');
        }
    }


Fails. Adding some debugging to Eloquent:


    /**
     * Boot all of the bootable traits on the model.
     *
     * @return void
     */
    protected static function bootTraits()
    {
        $class = static::class;

        foreach (class_uses_recursive($class) as $trait) {
            print("\nTesting that class: $class has method: " . $method = 'boot'.class_basename($trait) . " because of Trait: $trait\n");
            if (method_exists($class, $method = 'boot'.class_basename($trait))) {
                print("Class: $class has method: $method \n");
                try {
                    forward_static_call([$class, $method]);
                } catch (\PHPUnit_Framework_MockObject_BadMethodCallException $e) {
                    print("Class: $class failed calling $method\n");
                    throw $e;
                }
            }
        }
    }

给我们这个失败：

PHPUnit 5.1.0 by Sebastian Bergmann and contributors.

E                                                                   1 / 1 (100%)
Testing that class: Mock_MyModel_9ee820db has method: bootMyTrait because of Trait: App\MyTrait
Class: Mock_MyModel_9ee820db has method: bootMyTrait
Class: Mock_MyModel_9ee820db failed calling bootMyTrait


Time: 129 ms, Memory: 18.00Mb

There was 1 error:

1) ExampleTest::testTraitBooting
PHPUnit_Framework_MockObject_BadMethodCallException:

mock-bootable-laravel-model-trait/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:326
mock-bootable-laravel-model-trait/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:309
mock-bootable-laravel-model-trait/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:296
mock-bootable-laravel-model-trait/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:277
mock-bootable-laravel-model-trait/tests/ExampleTest.php:16

我还尝试了几种不同的方法来创建模拟。以DatabaseSoftDeletingTraitTest为例：

use Illuminate\Foundation\Testing\WithoutMiddleware;
use Illuminate\Foundation\Testing\DatabaseMigrations;
use Illuminate\Foundation\Testing\DatabaseTransactions;
use Mockery as m;

class ExampleTest extends TestCase
{
    /**
     * A basic functional test example.
     *
     * @return void
     */
    public function testTraitBooting()
    {
        $mock = m::mock('App\MyModel');
        $mock->shouldReceive('bootMyTrait')->once();
    }
}

但是在这里，bootMyTrait 永远不会被调用：

PHPUnit 5.1.0 by Sebastian Bergmann and contributors.

E                                                                   1 / 1 (100%)

Time: 149 ms, Memory: 19.25Mb

There was 1 error:

1) ExampleTest::testTraitBooting
Mockery\Exception\InvalidCountException: Method bootMyTrait() from Mockery_0_App_MyModel should be called
 exactly 1 times but called 0 times.

mock-bootable-laravel-model-trait/vendor/mockery/mockery/library/Mockery/CountValidator/Exact.php:37
mock-bootable-laravel-model-trait/vendor/mockery/mockery/library/Mockery/Expectation.php:271
mock-bootable-laravel-model-trait/vendor/mockery/mockery/library/Mockery/ExpectationDirector.php:120
mock-bootable-laravel-model-trait/vendor/mockery/mockery/library/Mockery/Container.php:297
mock-bootable-laravel-model-trait/vendor/mockery/mockery/library/Mockery/Container.php:282
mock-bootable-laravel-model-trait/vendor/mockery/mockery/library/Mockery.php:142
mock-bootable-laravel-model-trait/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:122

所以，我可以将我在 boot 方法中执行的代码移动到 ServiceProvider，但是我需要注册每个使用该特征的模型。这感觉很脏，使用引导方法似乎很合适。所以我想我要么遇到了一个错误，要么是在错误地嘲笑 trait-using-model。我看过getMockForTrait，但我还需要模拟实例来扩展 Eloquent（一些 trait 的方法调用 eloquent 方法）

如果有人看到我错过的东西（或者如果我完全以错误的方式接近这个），非常感谢

Answer 1

经过一些测试，我相信这样的方法足以测试它：

$mock = m::mock('App\MyModel')->makePartial();
$mock->shouldReceive('bootMyTrait')->once();
$mock->__construct();

解释：

1. $mock = m::mock('App\MyModel')->makePartial();

   我们创建了 mock，但我们将其设为部分，因为我们想使用默认的类构造函数和其他方法。使其部分化意味着我们不覆盖的所有方法都将从原始 App\MyModel 类中使用

2. $mock->shouldReceive('bootMyTrait')->once();

   这应该很明显 - 我们要验证 bootMyTrait 方法是否恰好运行了 1 次

3. $mock->__construct();

   这样我们可以运行默认的类构造函数。创建模拟时似乎没有使用构造函数，因此我们无法以其他方式对其进行测试。如果要确保启动原始类构造函数，则需要手动启动对象构造函数。