[Mailer] documentation misses how to do functional testing

[famoser]

In the documentation there is no section about functional testing: https://symfony.com/doc/current/mailer.html
In the swifmailer documentation there is a chapter about it: https://symfony.com/doc/current/email.html

It would be really useful, as I first tried to reverse engineer a solution based on the profiler, before I found the mailer assertions in the framework bundle.

If https://symfony.com/doc/current/mailer.html is the correct place to document this, I would write a short chapter based on information found here:

• https://symfony.com/blog/new-in-symfony-4-4-phpunit-assertions-for-email-messages
• https://symfony.com/doc/current/testing/functional_tests_assertions.html#mailer
• https://github.com/symfony/framework-bundle/blob/5.x/Test/MailerAssertionsTrait.php

Am I on the right track? If yes, I will prepare a MR.

[carsonbot]

Thank you for this issue.
There has not been a lot of activity here for a while. Has this been resolved?

[carsonbot]

Friendly ping? Should this still be open? I will close if I don't hear anything.

[famoser]

This is still unresolved, but now on my todo list. I will prepare a MR as soon as I have to time (still in this year).