Add VSCode settings for pytest configuration

[tobiasdiez]

Include settings to enable pytest in VSCode.

[dnicolodi]

Does VSCode really need to add this to all projects? I don't think we should add a configuration file for every editor or IDE someone may use to work on the project.

[eli-schwartz]

Does VSCode really need to add this to all projects? I don't think we should add a configuration file for every editor or IDE someone may use to work on the project.

Well, if you want vscode to automatically figure out how to run the test suite then it needs a machine readable way to figure out what test suite technology is used.

The python ecosystem has been resistant to date to defining a replacement for the setuptools test entrypoint, so there's not actually anything that vscode can do here. Piggybacking off of meson's own well-defined test command might help though.

[tobiasdiez]

Does VSCode really need to add this to all projects? I don't think we should add a configuration file for every editor or IDE someone may use to work on the project.

Yes, it's needed since otherwise vscode will not recognize the existing pytests and show them in its test inferface which provides a quite convenient way to re-run only a few tests and other helpful tooling.

Piggybacking off of meson's own well-defined test command might help though.

My impression is that vscode directly calls pytest to discover tests etc.

[rgommers]

Thanks @tobiasdiez.

This doesn't hurt and I don't think there's a better option that is generic across IDEs here (a la EditorConfig for formatting settings), so this seems okay to me.

[eli-schwartz]

My impression is that vscode directly calls pytest to discover tests etc.

In theory it could use meson via vscode-meson! :)

[rgommers]

I had a look at https://github.com/mesonbuild/vscode-meson, but not being a VSCode user, I'm not sure from the README how that would work exactly for hooking up a pytest invocation. It seems very reasonable for working on meson-python to suggest vscode-meson to VSCode users though.

[eli-schwartz]

but not being a VSCode user, I'm not sure from the README how that would work exactly for hooking up a pytest invocation.

Nor me, but I assume vscode-meson allows you to configure a build with meson setup and test it with meson test.

[tobiasdiez]

It's not just about running the tests (for which vscode-meson probably provides a task-integration), but also discovering all tests with detailed info (eg pytest --collect). This info is then used for https://code.visualstudio.com/docs/python/testing#_run-tests