chore(tests): Raise pytest Warnings as Errors instead

[ferdinandjarisch]

Since we are doing this for our plugins, it makes sense to also check for it here.

[rumpelsepp]

May you try if this works for you instead? If we use the setting in the pyproject.toml then any IDE, LSP, or whatever tooling people are using has the same settings when running the tests.

https://docs.pytest.org/en/stable/how-to/capture-warnings.html#controlling-warnings

# pyproject.toml
[tool.pytest.ini_options]
filterwarnings = [
    "error",
    "ignore::UserWarning",
    # note the use of single quote below to denote "raw" strings in TOML
    'ignore:function ham\(\) is deprecated:DeprecationWarning',
]

[ferdinandjarisch]

May you try if this works for you instead? If we use the setting in the pyproject.toml then any IDE, LSP, or whatever tooling people are using has the same settings when running the tests.

The example that you posted obviously does not work, but using pyproject.toml in general does.
Added a fixup commit with this approach; does that match what you had in mind?