markers leaking

[pytestbot]

Originally reported by: David Szotten (BitBucket: davidszotten, GitHub: davidszotten)

---

it looks like using custom markers on subclasses, together with a fixture on the base class causes siblings to see each other's markers:

import pytest


@pytest.fixture
def common():
    pass


@pytest.fixture
def checker(request):
    assert len(request.keywords.get('marker').args) == 1


@pytest.mark.usefixtures('common')
class Parent(object):
    pass


@pytest.mark.marker('arg1')
class TestChild1(Parent):
    def test(self, checker):
        pass


@pytest.mark.marker('arg2')
class TestChild2(Parent):
    def test(self, checker):
        pass

_________________________________________________ ERROR at setup of TestChild1.test _________________________________________________

request = <SubRequest 'checker' for <Function 'test'>>

    @pytest.fixture
    def checker(request):
>       assert len(request.keywords.get('marker').args) == 1
E       assert 2 == 1
E        +  where 2 = len(('arg1', 'arg2'))
E        +    where ('arg1', 'arg2') = <MarkInfo 'marker' args=('arg1', 'arg2') kwargs={}>.args
E        +      where <MarkInfo 'marker' args=('arg1', 'arg2') kwargs={}> = <bound method NodeKeywords.get of <NodeKeywords for node <Function 'test'>>>('marker')
E        +        where <bound method NodeKeywords.get of <NodeKeywords for node <Function 'test'>>> = <NodeKeywords for node <Function 'test'>>.get
E        +          where <NodeKeywords for node <Function 'test'>> = <SubRequest 'checker' for <Function 'test'>>.keywords

test_marker_bug.py:11: AssertionError

This might be related to #535

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• Bitbucket: https://bitbucket.org/pytest-dev/pytest/issue/631

[nicoddemus]

Duplicate of #568