how do the tests work ?

[yamawe]

Hello, I created this discussion because I don't really understand how automatic tests work. I cloned the directory, launched a virtual machine with python3.11.4, downloaded requirements.txt, pre-commit, black, ruff and mypy.

After that, I ran "ruff ." which didn't report any errors, when I ran "pre-commit run --all-files --show-diff-on-failure" all the tests passed, but when I ran "mypy .", I got hundreds of errors even though I didn't change anything in the programs. I don't understand how this is possible, since before each merge the pull request should have passed the tests. What's more, when I look at the pull requests, I see that they have passed the tests, whereas the hundreds of programs on which I see mypy errors have not been modified.

I guess the errors you get when you do 'mypy ...', just ignore them. So can you tell me what tests I need to run on my PC before making a pull request so that I don't get any failed tests?

thank you for your attention

[CaedenPH]

@yamawe When mypy is ran in isolation it seems to give different results than when ran with pre-commit (See #8070)
In order to make a successful pull request, you just need 1)pre-commit to pass and 2) pytest . to pass

[yamawe]

Thank you. Following your message, I launched pytest and received an error concerning an API key: "ERROR web_programming/currency_converter.py - KeyError: "API key must be provided in the 'AMDOREN_API_KEY' environment variable." Did I do something wrong or is this a bug?

[CaedenPH]

@yamawe That is not your fault, its a bug (#8738) that i've been trying to get @cclauss to review in order to fix

[yamawe]

thank you very much.

[CaedenPH]

@yamawe Do you have any more questions?

[yamawe]

No, thank you for your help.