Question

pytest非常精彩assert introspection因此很容易找到字符串的差异，特别是如果差异在空白区域。现在我使用了一个稍微复杂的测试助手，我在许多测试用例中重用了它。帮助器也有自己的模块，对于那个模块，我想添加断言内省。

helpers.py：

...
def my_helper():
    assert 'abcy' == 'abcx'

test_mycase.py：

from .helpers import my_helper


def test_assert_in_tc():
    assert 'abcy' == 'abcx'


def test_assert_in_helper():
    my_helper()

测试报告显示了测试中断言的有用信息，但not for asserts within the helper：

=============================================================== FAILURES ================================================================
___________________________________________________________ test_assert_in_tc ___________________________________________________________

    def test_assert_in_tc():
>       assert 'abcy' == 'abcx'
E       assert 'abcy' == 'abcx'
E         - abcy
E         ?    ^
E         + abcx
E         ?    ^

tests/test_pytest_assert.py:9: AssertionError
_________________________________________________________ test_assert_in_helper _________________________________________________________

    def test_assert_in_helper():
>       my_helper()

tests/test_pytest_assert.py:13: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

    def my_helper():
>       assert 'abcy' == 'abcx'
E       AssertionError

tests/helpers.py:258: AssertionError
======================================================= 2 failed in 0.24 seconds ========================================================

作为一种解决方法，我使用断言输出附加信息，但输出仍然看起来很奇怪并使代码爆炸。有什么想法我可以在帮助文件中激活pytest断言内省吗？

我发现different, but related question很遗憾我到目前为止无法解决问题：

import pytest
from .helpers import my_helper
pytest.register_assert_rewrite('helpers.my_helper')

Answer 1

我必须将register_assert_rewrite放入tests / __ init__.py中，如下所示：

import pytest

# we want to have pytest assert introspection in the helpers
pytest.register_assert_rewrite('tests.helpers')

pytest断言辅助函数

1 个答案: