如何在symfony2中测试服务？ [英] How can I test a service in symfony2?

问题描述

由于我正在使用服务，这个问题可能在symfony中成为依赖注入的问题。目前，我正在尝试通过phpunit测试在我的服务中测试一个简单的功能，我不断收到以下错误：

Since I'm working with services, this question may end up being an issue with dependency-injection in symfony. Currently I'm trying to test one simple feature in my service via phpunit test and I keep getting the following error:

PHP Catchable fatal error:  Argument 1 passed to Caremonk\MainSiteBundle\Tests\Services\GeoTest::__construct() must be an instance of Caremonk\MainSiteBundle\Tests\Services\Geo, none given, called in /usr/share/nginx/html/caremonk/vendor/phpunit/phpunit/PHPUnit/Framework/TestSuite.php on line 473 and defined in /usr/share/nginx/html/caremonk/src/Caremonk/MainSiteBundle/Tests/Services/GeoTest.php on line 14

从错误中，显然我正在尝试创建一个我的服务和正确的参数是没有被传递的，所以在我的services.yml文件中：

From the error, it is obvious that I am trying create an instance of my service and the correct argument is not being passed, so bellow is my services.yml file:

#src/Caremonk/MainSiteBundle/Resources/config/services.yml
parameters:
    caremonk_main_site.geo.class: Caremonk\MainSiteBundle\Services\Geo
    caremonk_main_site.geo_test.class: Caremonk\MainSiteBundle\Tests\Services\GeoTest

services:
    geo:
        class: %caremonk_main_site.geo.class%
        arguments: []

    geo_test:
        class: %caremonk_main_site.geo_test.class%
        arguments: ["@geo"]

Bellow是我建立的服务：

Bellow is my service that I've built:

<?php
//src/Caremonk/MainSiteBundle/Services/Geo.php
namespace Caremonk\MainSiteBundle\Services;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;

class Geo extends Controller
{

    public $pi80;
    public $latRad;
    public $lngRad;

    public function __construct()
    {
        $this->pi80 = M_PI / 180;
    }

    // Takes longitude and latitude and converts them into their respective radians
    // We also set our class properties to these values
    public function setCoordinates($lat,$lng)
    {
        $this->latRad = $lat * $this->pi80;
        $this->lngRad = $lng * $this->pi80;
    }

    public function distance($lat2, $lng2, $miles = true)
    {
        $lat1 = $this->latRad;
        $lng1 = $this->lngRad;
        $lat2 *= $pi80;
        $lng2 *= $pi80;

        $r = 6372.797; // mean radius of Earth in km
        $dlat = ($lat2 - $lat1)/2;
        $dlng = ($lng2 - $lng1)/2;
        $a = sin($dlat) * sin($dlat) + cos($lat1) * cos($lat2) * sin($dlng) * sin($dlng);
        $c = 2 * atan2(sqrt($a), sqrt(1 - $a));
        $km = $r * $c;

        return ($miles ? ($km * 0.621371192) : $km);
    }

    // This function returns the minimum latitude in radians
    public function min_lat($lat,$lng,$dis)
    {
         $dis /= .62137119;
         $ratio = $dis/6372.797;
         return asin(sin($lat)*cos($ratio) + cos($lat)*sin($ratio)*cos(M_PI));
    }

    // This function returns the max latitude in radians
    public function max_lat($lat,$lng,$dis)
    {
         $dis /= .62137119;
         $ratio = $dis/6372.797;
         return asin(sin($lat)*cos($ratio) + cos($lat)*sin($ratio)*cos(0));
    }

    // This function returns max longitude in radians
    public function max_lon($lat,$lng,$dis)
    {
         $dis /= .62137119;
         $ratio = $dis/6372.797;
         return $lng + atan2(sin(M_PI/2)*sin($ratio)*cos($lat),cos($ratio)-sin($lat)*sin($lat));
    }

    // This function returns min longitude in radians
    public function min_lon($lat,$lng,$dis)
    {
         $dis /= .62137119;
         $ratio = $dis/6372.797;
         return $lng + atan2(sin(M_PI*1.5)*sin($ratio)*cos($lat),cos($ratio)-sin($lat)*sin($lat));
    }
}

我的测试文件显示在这里：

My test file is shown here:

<?php
//src/Caremonk/MainSiteBundle/Tests/Services/GeoTest.php

namespace Caremonk\MainSiteBundle\Tests\Services;

use Caremonk\MainSiteBundle\Services;
use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
use Symfony\Component\DependencyInjection\ContainerBuilder;

class GeoTest extends WebTestCase
{
    public $geo; 

    public function __construct(Geo $geo)
    {
        $this->geo = $geo;
    }

    public function testSetCoordinates()
    {
        $this->geo->setCoordinates(4,5);
        //print $geoService->distance(6,5);
    }
}

最后，我的服务注册在应用程序/ config.yml文件：

Lastly, my services are registered bellow in the app/config.yml file:

imports:
    - { resource: parameters.yml }
    - { resource: security.yml }
    - { resource: "@CaremonkMainSiteBundle/Resources/config/services.yml" }
# Other config.yml stuff

我没有得到很好的依赖，我希望我对这篇文章的解释是接近symfony的想法。请让我知道我在做什么错，所以我可以测试我的服务。

I don't get dependency that well and I'm hoping that my interpretation of it as shown in this post is close to what symfony had in mind. Please let me know what I'm doing wrong so I can test my service.

推荐答案

在你的测试用例中不要在构造函数中得到任何东西 - 您可以在setupBeforeClass或setup方法中设置要测试的对象，例如

In your test case, you're not going to get anything in your constructor - you can set up the object you want to test in a setupBeforeClass or setup method, e.g.

public static function setUpBeforeClass()
{
     //start the symfony kernel
     $kernel = static::createKernel();
     $kernel->boot();

     //get the DI container
     self::$container = $kernel->getContainer();

     //now we can instantiate our service (if you want a fresh one for
     //each test method, do this in setUp() instead
     self::$geo = self::$container->get('geo');
}

（另请注意，您不需要将测试类设置为服务，因此您可以从services.yml中删除geo_test服务）

(Note also you don't need to set up your test classes as services either, so you can remove your geo_test service from services.yml)

一旦你完成那么你应该能够运行你的测试用例，如

Once you've done that, you should be able to run your test case with something like

cd /root/of/project
phpunit -c app src/Caremonk/MainSiteBundle/Tests/Services/GeoTest.php

这篇关于如何在symfony2中测试服务？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！