Re: [ft-devel] Integrating Docwriter into FreeType

[Nikolaus Waxweiler]

Keep in mind that you need to tell tox to cd into tests/ before running pytest, otherwise you’re testing the source directory instead of the installed package.

https://tox.readthedocs.io/en/latest/config.html#confval-changedir=path

I'm running the tests on the source directory using `python -m pytest' with tox. Pytest collects all tests and runs it on the source, and all imports in the test files are like 'from docwriter import ...' so I think this is the right configuration. Am I missing something? (https://travis-ci.com/nikramakrishnan/freetype-docwriter/jobs/136998196#L445)

This is a bit tricky in Python, see https://blog.ionelmc.ro/2014/05/25/python-packaging/#the-structure.

Basically, tox and therefore pytest is run from the project root directory, which happens to have the docwriter module-directory. Python by default has the current directory in the import path. pytest will collect the tests and run them — when they import docwriter, they will actually import the module-directory in the project root! You however want to test the package as installed by tox somewhere in .tox/…. Stepping out of the root directory, e.g. into the tests directory ensures this.