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How to Test that an Email is Sent in a Functional Test

How to Test that an Email is Sent in a Functional TestΒΆ

Sending emails with Symfony is pretty straightforward thanks to the SwiftmailerBundle, which leverages the power of the Swift Mailer library.

To functionally test that an email was sent, and even assert the email subject, content or any other headers, you can use the Symfony Profiler.

Start with an easy controller action that sends an email:

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public function sendEmailAction($name)
{
    $message = \Swift_Message::newInstance()
        ->setSubject('Hello Email')
        ->setFrom('send@example.com')
        ->setTo('recipient@example.com')
        ->setBody('You should see me from the profiler!')
    ;

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

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

Note

Don't forget to enable the profiler as explained in How to Use the Profiler in a Functional Test.

In your functional test, use the swiftmailer collector on the profiler to get information about the messages sent on the previous request:

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// tests/AppBundle/Controller/MailControllerTest.php
namespace Tests\AppBundle\Controller;

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 email was sent
        $this->assertEquals(1, $mailCollector->getMessageCount());

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

        // Asserting email data
        $this->assertInstanceOf('Swift_Message', $message);
        $this->assertEquals('Hello Email', $message->getSubject());
        $this->assertEquals('send@example.com', key($message->getFrom()));
        $this->assertEquals('recipient@example.com', key($message->getTo()));
        $this->assertEquals(
            'You should see me from the profiler!',
            $message->getBody()
        );
    }
}

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.