pytest-mypy

Mypy static type checker plugin for pytest

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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

Contributing

Contributions are very welcome. Tests can be run with tox, please ensure the coverage at least stays the same before you submit a pull request.

Development Environment Setup

Here's how to install pytest-mypy in development mode so you can test your changes locally:

$ pyvenv venv
$ source venv/bin/activate
$ python setup.py develop
$ venv/bin/py.test --mypy example_test.py

How to publish a new version to PyPI

$ pip install twine wheel
$ python setup.py sdist bdist_wheel
$ twine upload dist/*

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_org – https://dbader.org – [email protected]

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