Document how to run code coverage with phpunit

[tswfi]

Questions	Answers
Branch?	8.x
Description?	Document how to run coverage tests with phpunit
Fixed ticket?

[tswfi]

yup, added few more steps and links to more information

[PierreRambaud]

I'm afraid I'm not a docker expert so I need @PierreRambaud to review this contribution

I don't get the relation between docker and code coverage. Above there is no mention of docker. Here's is how you manage to make it work for your environment. If you want to explain something it should be easier and better to only talk about ./vendor/bin/phpunit not the environment you're working on

[tswfi]

docker environment is a "sure" way to get a working environment and running the tests inside the container makes everybody run the tests the same way.

The devdocs has information on how to get the docker environment up: https://devdocs.prestashop.com/8/contribute/contribute-pull-requests/contribute_using_docker/#install-prestashop-core and using the same environment to run the tests is simple for everybody.

One could argue that all the documentation should be done on top of the docker environment to have "one way of doing things" and if someone wants to do something else then they will probably know enough to do it.

[kpodemski]

The part I'm missing is:

If you use Docker env [...]

Not everyone runs docker env, and you can simply have native env prepared. Maybe we should make sure to mention it?

[matks]

Hello @thomasnares here is an interesting question: should this content be added to doc or not ? 😅 we could not find the answer in 2021