pytest.raises(AssertionError) fails with compiled cython modules

[pytestbot]

Originally reported by: Steffen Roecker (BitBucket: sroecker, GitHub: sroecker)

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This issue seems similar to issue #176.
Running with unittest works fine, however pytest fails when the imported module assert_helper is compiled to a .so with Cython.

cython assert_helper.py
gcc -c -fPIC -I/usr/include/python2.7/ assert_helper.c
gcc -shared assert_helper.o -o assert_helper.so

platform linux2 -- Python 2.7.3 -- py-1.4.26 -- pytest-2.6.4
plugins: xdist, cov, mock
Cython==0.21

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• Bitbucket: https://bitbucket.org/pytest-dev/pytest/issue/645

[pytestbot]

Original comment by Steffen Roecker (BitBucket: sroecker, GitHub: sroecker):

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Fix instructions

[RonnyPfannschmidt]

rauses should take the assertion rewriting into acount and match the BuiltinAssertionError when assertion rewriting is enabled

[RonnyPfannschmidt]

pytest-output.txt
test_assertion.py.txt
assert_helper.py.txt

synced the attachements
@sroecker anything you can tell on cython, we already have some code in place to handle it but that seems to miss magic special cases from cython