模拟一个依赖的方法对我不起作用。当我需要测试的方法是调用它的依赖方法时,调用真正的方法而不是它的模拟版本。
我有以下文件:
myLibrary.py
from src.myOtherLibrary import myOtherLibrary
class myLibrary():
def __init__():
self.myVar = myOtherLibrary() #dependancy
def my_method():
method1 = self.method1()
externalMethod2 self.myVar.method2() #method2 called from the external class myOtherLibrary
return method1 + externalMethod2
def method1():
return "method1 from myLibrary..."
的src / myOtherLibrary.py
class myOtherLibrary():
def method2():
return "method2 from myOtherLibrary..."
最后单元测试:
TestMyLibrary.py
import unittest
import mock
from myLibrary import myLibrary
from src.myOtherLibrary import myOtherLibrary
class TestMyLibrary(unittest.TestCase):
@mock.patch('myLibrary.myLibrary.method1') #mocking this works because it's a sibling method from my_method() to test
@mock.patch('src.myOtherLibrary.myOtherLibrary.method2') #this does not work because it's an external class from myLibrary
def test_my_method(my_method1_to_mock, my_method2_to_mock):
my_method1_to_mock.return_value = "something_to_return.."
my_method2_to_mock.return_value = "something_else_to_return.."
myLibraryVar = myLibrary()
result = myLibraryVar.my_method()
print result #I would expect to see this: "something_to_return..something_else_to_return.."
#But it actually prints this: "something_to_return..method2 from myOtherLibrary..."
#So mocking is not working for method2
self.assertEqual('something_to_return..something_else_to_return..', result)
if __name__ == '__main__':
unittest.main()
提及myLibrary.py和TestMyLibrary.py位于同一文件夹中可能很重要,但myOtherLibrary.py位于不同的文件夹级别。
我希望你能帮助我找到我在这里失踪的东西。
任何建议都将得到很好的赞赏。 感谢。
答案 0 :(得分:0)
你不能patch
这样,因为你试图模拟的方法是类方法而不是函数。所以你需要使用patch.object
。
@mock.patch.object(myLibrary, 'method1')
@mock.patch.object(myOtherLibrary, 'method2')
...