如何在功能测试中测试电子邮件（Symfony2）

我正在尝试在功能测试中测试电子邮件......

我的源代码是一样的食谱的例子 http://symfony.com/doc/current/cookbook/email/testing.html,

控制器：

public function sendEmailAction($name)
{
    $message = \Swift_Message::newInstance()
        ->setSubject('Hello Email')
        ->setFrom('[email protected] /cdn-cgi/l/email-protection')
        ->setTo('[email protected] /cdn-cgi/l/email-protection')
        ->setBody('You should see me from the profiler!')
    ;

    $this->get('mailer')->send($message);

    return $this->render(...);
}

和测试：

// src/Acme/DemoBundle/Tests/Controller/MailControllerTest.php
use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;

class MailControllerTest extends WebTestCase
{
    public function testMailIsSentAndContentIsOk()
    {
        $client = static::createClient();

        // Enable the profiler for the next request (it does nothing if the profiler is not available)
        $client->enableProfiler();

        $crawler = $client->request('POST', '/path/to/above/action');

        $mailCollector = $client->getProfile()->getCollector('swiftmailer');

        // Check that an e-mail was sent
        $this->assertEquals(1, $mailCollector->getMessageCount());

        $collectedMessages = $mailCollector->getMessages();
        $message = $collectedMessages[0];

        // Asserting e-mail data
        $this->assertInstanceOf('Swift_Message', $message);
        $this->assertEquals('Hello Email', $message->getSubject());
        $this->assertEquals('[email protected] /cdn-cgi/l/email-protection', key($message->getFrom()));
        $this->assertEquals('[email protected] /cdn-cgi/l/email-protection', key($message->getTo()));
        $this->assertEquals(
            'You should see me from the profiler!',
            $message->getBody()
        );
    }
}

但是我收到了这个错误：

PHP 致命错误：调用成员函数 getCollector() 非对象

问题来自这一行：

$mailCollector = $client->getProfile()->getCollector('swiftmailer');

任何想法 ？

抛出异常是因为getProfile()如果未启用探查器，则返回 false。看here https://github.com/symfony/symfony/blob/master/src/Symfony/Bundle/FrameworkBundle/Client.php#L66.

public function getProfile()
{
    if (!$this->kernel->getContainer()->has('profiler')) {
        return false;
    }

    return $this->kernel->getContainer()->get('profiler')->loadProfileFromResponse($this->response);
}

此外enableProfiler()仅当分析器注册到服务容器（即启用）时才启用分析器。看here https://github.com/symfony/symfony/blob/master/src/Symfony/Bundle/FrameworkBundle/Client.php#L80.

public function enableProfiler()
{
    if ($this->kernel->getContainer()->has('profiler')) {
        $this->profiler = true;
    }
}

现在您必须确保在测试环境中启用探查器。 （通常应该是默认设置 http://symfony.com/doc/current/reference/configuration/framework.html#profiler )

配置测试.yml

framework:
   profiler:
       enabled: true

您可以将这样的内容添加到您的测试中：

$this->assertEquals($this->kernel->getContainer()->has('profiler'), true);