Skip to content

realpython/pytest-mypy

Repository files navigation

pytest-mypy

Mypy static type checker plugin for pytest

See Latest Release on PyPI

Features

  • Runs the mypy static type checker on your source files as part of your pytest test runs.
  • Does for mypy what the pytest-flake8 plugin does for flake8.
  • This is a work in progress – pull requests appreciated.

Installation

You can install "pytest-mypy" via pip from PyPI:

$ pip install pytest-mypy

Usage

You can enable pytest-mypy with the --mypy flag:

$ py.test --mypy test_*.py

Mypy supports reading configuration settings from a mypy.ini file. Alternatively, the plugin can be configured in a conftest.py to invoke mypy with extra options:

def pytest_configure(config):
    plugin = config.pluginmanager.getplugin('mypy')
    plugin.mypy_argv.append('--check-untyped-defs')

You can restrict your test run to only perform mypy checks and not any other tests by using the -m option:

py.test --mypy -m mypy test_*.py

License

Distributed under the terms of the MIT license, "pytest-mypy" is free and open source software

Issues

If you encounter any problems, please file an issue along with a detailed description.

Meta

Daniel Bader – @dbader_orghttps://dbader.org[email protected]

https://github.com/realpython/pytest-mypy