我为令人困惑的标题表示歉意,但不确定是否有更好的方法来描述问题。我有一个具有以下结构的python库:
library/
src/
code/
__init__.py
baseclass.py
helpers.py
class1.py
tests/
__init__.py
test_library.py
我正在尝试在baseclass.py中的类中测试功能。 baseclass.py中类中的函数从class1.py返回类对象,如下所示: baseclass.py:
from class1 import DeviceClass
class LibraryBuilder:
def __init__(self, user, password):
......
def get_devices(self):
devlist = helpers.call_api('api_url', 'post', header, json)
#Return a list of dictionaries
for dev in devlist:
if dev = "DeviceType":
return DeviceClass(dev, self)
test_library.py
import pytest
from unittest.mock import patch, Mock
from library.baseclass import LibraryBuilder
import library
from library.class1 import DeviceClass
class TestDeviceList(object):
@pytest.fixture()
def api_mock(self, caplog):
self.mock_api_call = patch('library.helpers.call_api', autospec=True)
self.mock_api = self.mock_api_call.start()
self.mock_api.return_value.ok = True
self.library_obj = library.baseclass.LibraryBuilder('sam@mail.com', 'pass')
yield
self.mock_api_call.stop()
@patch.object('baseclass.class1', 'DeviceClass', autospec=True)
def test_get_devices_all(self, caplog, dev_mock, api_mock):
self.mock_api.return_value = return_dict
devs = self.library_object.get_devices()
dev_mock.assert_called_with(return_dict, self.library_object)
测试失败,因为从未调用过“ device_object”。调试时,我看到创建的device_patch对象不是模拟对象,而是实际的DeviceClass对象。
我尝试引用device_object路径到patch.object('library.baseclass', 'DeviceClass', autospec=True)
。我尝试了导入类的变体,因为我认为这与下面的线程有关,但是我无法弄清楚哪里出了问题:
Why python mock patch doesn't work?
call_api模拟可以正常工作。 library_object根据call_api模拟的return_value返回实际的实例化类
我只是将代码从单个文件重构为此配置,并且在此之前测试已经通过。关于我所缺少的任何想法吗?
编辑
我进行了进一步调试,我相信这与从DeviceClass
继承的DeviceBaseClass
有关,因此device_class.py看起来像:
class DeviceBaseClass(object):
def __init__(self, details, manager):
self.details = {}
..............
class DeviceClass(DeviceBaseClass):
def __init__(self, details, manager):
super(DeviceClass, self).__init__(details, manager)
所以现在我收到消息TypeError: super() argument 1 must be type not MagicMock
。我正在猜测,因为我在模拟DeviceClass,所以在super()方法中调用了模拟的类。我还看到了其他一些帖子,但是还没有找到解决方案。是我遗漏了明显的东西还是走错了路?
答案 0 :(得分:0)
最后弄清楚了,因为我认为这是导入模块的位置。我尝试了所有可能的变体,解决方案是确保从被调用的位置打补丁的对象。我不知道为什么我昨晚没看到这个!!
原始呼叫补丁为@patch('baseclass.class1', 'DeviceClass', autospec=True)
,正确的补丁为@patch('baseclass.DeviceClass', autospec=True)
,如下所示
import pytest
from unittest.mock import patch, Mock
from library.baseclass import LibraryBuilder
import library
from library.class1 import DeviceClass
class TestDeviceList(object):
@pytest.fixture()
def api_mock(self, caplog):
self.mock_api_call = patch('library.helpers.call_api', autospec=True)
self.mock_api = self.mock_api_call.start()
self.mock_api.return_value.ok = True
self.library_obj = library.baseclass.LibraryBuilder('sam@mail.com', 'pass')
yield
self.mock_api_call.stop()
@patch('Library.baseclass.DeviceClass', autospec=True)
def test_get_devices_all(self, caplog, dev_mock, api_mock):
self.mock_api.return_value = return_dict
devs = self.library_object.get_devices()
dev_mock.assert_called_with(return_dict, self.library_object)