Noestests：在多个文件上运行Nosetests时，使用@patch的AttributeError

Question

我正在多个文件上进行鼻子测试，并收到与导入特定文件有关的错误，我实际上不确定该错误与什么相关，我认为这与导入有关或与修补有关它的。 错误本身看起来像：

（对于使用@patch装饰器的每个测试函数，我都会收到这些错误之一）

Error
Traceback (most recent call last):
  File "/home/user/Documents/venvs/migration/local/lib/python2.7/site-packages/unittest2/case.py", line 67, in testPartExecutor
yield
  File "/home/user/Documents/venvs/migration/local/lib/python2.7/site-packages/unittest2/case.py", line 625, in run
testMethod()
  File "/home/user/Documents/venvs/migration/local/lib/python2.7/site-packages/mock/mock.py", line 1297, in patched
arg = patching.__enter__()
  File "/home/user/Documents/venvs/migration/local/lib/python2.7/site-packages/mock/mock.py", line 1353, in __enter__
self.target = self.getter()
  File "/home/user/Documents/venvs/migration/local/lib/python2.7/site-packages/mock/mock.py", line 1523, in <lambda>
getter = lambda: _importer(target)
  File "/home/user/Documents/venvs/migration/local/lib/python2.7/site-packages/mock/mock.py", line 1210, in _importer
thing = _dot_lookup(thing, comp, import_path)
  File "/home/user/Documents/venvs/migration/local/lib/python2.7/site-packages/mock/mock.py", line 1200, in _dot_lookup
return getattr(thing, comp)
AttributeError: 'module' object has no attribute 'utils'

包结构如下所示：

my_package
    - my_module
        - __init__.py
        - utils.py
        - other.py
    - tests
        - test_utils.py
        - test_other.py

鼻子测试命令：

nosetests -e unit --with-coverage --cover-package=my_package --cover-erase --cover-xml --with-xunit tests --nocapture

因此，很奇怪的是，如果我仅对utils测试类本身运行过鼻子测试，则可以正常运行，所有导入工作且所有补丁均有效，没有错误，所有测试均通过。

这是test_utils.py文件的样子：

from my_module.utils import *

class TestBusinessProcess(unittest2.TestCase):        

    @patch('my_module.utils.something')
    def test_some_utils_function(self, something_mock):
        # test implementation..
        # this function will throw:
        # AttributeError: 'module' object has no attribute 'utils'
        # when running whole tests folder and not on individual test file
        pass

    @patch('my_module.utils.something_else')
    def test_some_other_utils_function(self, something_else_mock):
        # test implementation..
        # same as above
        pass

另一个测试文件中的一个测试示例，无论哪种运行方式都没有问题：

from my_module.other import *

class TestBusinessProcess(unittest2.TestCase):        

    @patch('my_module.other.something')
    def test_some_function(self, something_mock):
        # test implementation..
        # no issues!
        pass

    @patch('my_module.other.something_else')
    def test_some_other_function(self, something_else_mock):
        # test implementation..
        # no issues!
        pass

任何帮助，不胜感激。

Answer 1

我仍然不知道出了什么问题，但这似乎与导入有关。

无论如何，此解决方法可以解决问题，但不确定为什么会这样。

my_module中的__init__.py最初为空。 然后，我对其进行了编辑，以显示utils.py的各个功能：

__init__.py

from utils import test_some_utils_function, test_some_other_utils_function

__all__ = [
    "test_some_utils_function",
    "test_some_other_utils_function"
]