[Mailer] documentation misses how to do functional testing #14397
Description
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.