Laravel:在自定义Route :: model绑定中使用模拟实例 [英] Laravel: Using mock instance in Customised Route::model binding

问题描述

Laravel中的路由模型绑定有助于将实例绑定到服务容器，以便在控制器操作中使用.而且美丽的是，当我想编写测试时，可以将模拟实例绑定到应用程序，从而替换绑定到容器的内容. -App::instance($className, $mockInstance);

Route model binding in Laravel, helps bind an instance to the service container, to be used in a controller action. And the beautiful thing is that when I want to write tests, I can bind a mock instance to the application, which replaces what is bound to the container. - App::instance($className, $mockInstance);

我已请求路线(Route::get("/{class_name}")).我想根据路由参数class_name的值返回类的实例.

I have made a request to the route (Route::get("/{class_name}")). I want to return an instance of the class, depending on what the value of the route parameter class_name is.

如果值是two，则我想要Two类的实例，对于One类也是如此.请注意，这两个类都继承自AbstractClass，因此返回的实例的类型为AbstractClass(PHP7).

If the value is two, I want an instance of the Two class, likewise for the One class. Notice that both classes inherit from AbstractClass, so the returned instance is of type AbstractClass, (PHP7).

问题:当我访问路线时，我得到了正确的实例.但是，当我要使用模拟实例时，它会覆盖模拟实例并创建/返回主实例.我需要使用模拟实例，以便可以对此设置期望.

Problem: When I make visit the route, I get the correct instance. But when I want to use the mock instance, it overrides the mock instance and creates/returns the main instance. I need to use the mock instance so I can set expectations on it.

我添加了一些代码，希望可以说明我的意思.

I've added some code, which I hope illustrates what I mean.

abstract class AbstractClass {
// abstract parent class
}

class One extends AbstractClass {
// single child class
}

class Two extends AbstractClass {
// another single child class
}

// I put this inside the `bind` method of the RouteServiceProvider
Route::bind("class_name", function (string $class_name) : AbstractClass {
 // I wish to return an instance to the route, based on the string that was passed - "one" or "two"
 $class = ucfirst($class_name);
 return new $class();
});

// test
public function testSomething () {
 $mockInstance = Mockery::mock(AbstractClass::class);
 App::instance(AbstractClass::class, $mockInstance);
 $response = $this->get("/one");
}
// controller method
public function action (AbstractClass $instance) {
 // I want to see/use the mock instance here, for testing
 // and the main instance otherwise.
}

我正在使用PHP7.0，并使用Laravel5.4进行开发

I am using PHP7.0, with Laravel5.4 for development

推荐答案

原因: 好吧，我想您会混淆Router bindings与Container Bindings.这两个在本质上是完全分开的.

Reason: Well I guess you're confusing Router bindings vs Container Bindings. These two are completely separate in nature.

答案: 编写测试时，只需更新路由器绑定即可.

Answer: Just update the router bindings when you're writing tests.

        $mock = Mockery::mock(AbstractClass::class);

        $this->app->get('router')->bind('class', function () use ($mock) {
             return $mock;
        });

        $response = $this->get("/test");

路由器绑定: 这些绑定仅在涉及路由时才能解决，而在使用app()实例时则无法解决.

Router Bindings: These bindings are only resolved when routing is involved, and it cannot be resolved when you're using app() instance.

容器绑定: 容器绑定是单独的，根本不了解路由器绑定.

Container Bindings: Container bindings are separate and it doesn't know about the router bindings at all.

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