pytest-dev / pytest-dev/pytest
mypy plugin for `@mark.parametrize`
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type: proposal
- Dominant language
- Python
- Stars
- 14.5k
- Forks
- 3.4k
- Avg merge
- 2d 9h
- Merged PRs (30d)
- 35
Description
The idea is that a plugin would allow the arguments to the @pytest.mark.parametrize decorator to be type-checked.
For example:
import pytest
@pytest.mark.parametrize(
"arg",
[
123, # correct type int
456.789, # wrong type float, mypy plugin to complain
]
)
def test_foo(
arg: int # plugin reads `int` annotation here
) -> None:
...
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The issue names no repository files, tests, or entry points. Start by identifying how pytest.mark.parametrize is implemented and how mypy plugins receive function annotations; done would include type-checking the demonstrated mismatched float argument.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- testing
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100