pytest.raises(AssertionError) fails with cython modules

[pytestbot]

Originally reported by: Jim Garrison (BitBucket: garrison, GitHub: garrison)

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Define the files python_assert.py and cython_assert.pyx to be identical, each containing a simple function that raises AssertionError:

#!python
def raise_assertionerror():
    assert False

I would expect both of the following tests to succeed under pytest:

#!python
import pytest

import pyximport
pyximport.install()

from python_assert import raise_assertionerror as python_assert
from cython_assert import raise_assertionerror as cython_assert

def test_assertion():
    with pytest.raises(AssertionError):
        python_assert()

def test_cython_assertion():
    with pytest.raises(AssertionError):
        cython_assert()

However, the cython test fails.

This seems to be a problem with pytest because the equivalent unittest succeeds.

Further, the pytest test succeeds if we call pytest.raises(Exception) instead of pytest.raises(AssertionError).

Any idea what is wrong?

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• Bitbucket: https://bitbucket.org/pytest-dev/pytest/issue/176

[pytestbot]

Original comment by Jim Garrison (BitBucket: garrison, GitHub: garrison):

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(Using pytest 2.2.4, cython 0.16, python 2.7.3)

[pytestbot]

Original comment by holger krekel (BitBucket: hpk42, GitHub: hpk42):

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thanks for the info - could you also attach/post the py.test invocation and its output?

[pytestbot]

Original comment by Ronny Pfannschmidt (BitBucket: RonnyPfannschmidt, GitHub: RonnyPfannschmidt):

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fix issue 176: raises(AssertionError) now catches builtin AssertionError as well