Question

将文件python_assert.py和cython_assert.pyx定义为相同，每个文件都包含一个引发AssertionError的简单函数：

def raise_assertionerror():
    assert False

我希望以下两个测试都能在pytest下成功：

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()

但是，cython测试失败了：

===================================== FAILURES ======================================
_______________________________ test_cython_assertion _______________________________

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

test_pytest_assertion.py:15: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

>   assert False
E   AssertionError

cython_assert.pyx:2: AssertionError
======================== 1 failed, 1 passed in 0.61 seconds =========================

这似乎是pytest的一个问题，因为等效的单位测试成功了：

import unittest

import pyximport
pyximport.install()

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

class MyTestCase(unittest.TestCase):
    def test_cython(self):
        self.assertRaises(AssertionError, cython_assert)

    def test_python(self):
        self.assertRaises(AssertionError, python_assert)

if __name__ == "__main__":
    unittest.main()

此外，如果我们拨打pytest.raises(Exception)而不是pytest.raises(AssertionError)，则pytest测试成功。

知道出了什么问题吗？

Answer 1

这已经recognized as a bug in pytest并已解决。

pytest.raises（AssertionError）因cython模块而失败

1 个答案: