Update CommandTester.php

[dtfafard]

Add a way to access the command to create command specific tests related to the given command

[symfony-bot]

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However, this repository is what we call a "subtree split": a read-only copy of one directory of the main Symfony repository. It is used by Composer to allow developers to depend on specific Symfony components.

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PS: if you haven't already, please add tests, and beware that bug fixes should be submitted on the lowest maintained branch where they apply; only features should be submitted against the master branch.

[dtfafard]

I haven't seen any way to unit test the logging system while injecting logger into the command. So I'm thinking of accessing the Command->getLogger() to access the logging system and then access all the logs written in the command.

An other addition might be to add proper documentation in unit testing the Command output when combined with Monolog.