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A Pylint plugin to suppress pytest-related false positives.

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NOTE

This package has moved to https://github.com/pylint-dev/pylint-pytest. Active development occurs on that fork.

pylint-pytest

PyPI version fury.io Travis CI AppVeyor

A Pylint plugin to suppress pytest-related false positives.

Installation

Requirements:

  • pylint
  • pytest>=4.6

To install:

$ pip install pylint-pytest

Usage

Enable via command line option --load-plugins

$ pylint --load-plugins pylint_pytest <path_to_your_sources>

Or in pylintrc:

[MASTER]
load-plugins=pylint_pytest

Suppressed Pylint Warnings

unused-argument

FP when a fixture is used in an applicable function but not referenced in the function body, e.g.

def test_something(conftest_fixture):  # <- Unused argument 'conftest_fixture'
    assert True

unused-import

FP when an imported fixture is used in an applicable function, e.g.

from fixture_collections import imported_fixture  # <- Unused imported_fixture imported from fixture_collections

def test_something(imported_fixture):
    ...

redefined-outer-name

FP when an imported/declared fixture is used in an applicable function, e.g.

from fixture_collections import imported_fixture

def test_something(imported_fixture):  # <- Redefining name 'imported_fixture' from outer scope (line 1)
    ...

no-member

FP when class attributes are defined in setup fixtures

import pytest

class TestClass(object):
    @staticmethod
    @pytest.fixture(scope='class', autouse=True)
    def setup_class(request):
        cls = request.cls
        cls.defined_in_setup_class = True

    def test_foo(self):
        assert self.defined_in_setup_class  # <- Instance of 'TestClass' has no 'defined_in_setup_class' member

Raise new warning(s)

W6401 deprecated-pytest-yield-fixture

Raise when using deprecated @pytest.yield_fixture decorator (ref)

import pytest

@pytest.yield_fixture  # <- Using a deprecated @pytest.yield_fixture decorator
def yield_fixture():
    yield

W6402 useless-pytest-mark-decorator

Raise when using every @pytest.mark.* for the fixture (ref)

import pytest

@pytest.fixture
def awesome_fixture():
    ...

@pytest.fixture
@pytest.mark.usefixtures("awesome_fixture")  # <- Using useless `@pytest.mark.*` decorator for fixtures
def another_awesome_fixture():
    ...

W6403 deprecated-positional-argument-for-pytest-fixture

Raise when using deprecated positional arguments for fixture decorator (ref)

import pytest

@pytest.fixture("module")  # <- Using a deprecated positional arguments for fixture
def awesome_fixture():
    ...

F6401 cannot-enumerate-pytest-fixtures

Raise when the plugin cannot enumerate and collect pytest fixtures for analysis

NOTE: this warning is only added to test modules (test_*.py / *_test.py)

import no_such_package  # <- pylint-pytest plugin cannot enumerate and collect pytest fixtures

Changelog

See CHANGELOG.

License

pylint-pytest is available under MIT license.

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A Pylint plugin to suppress pytest-related false positives.

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