def f1():
return 10, True
def f2():
num, stat = f1()
return 2*num, stat
我如何使用Python的模拟库修补f1()
并返回一个自定义的结果,所以我可以测试f2()
编辑:有什么错我的测试? 这似乎并不奏效,所有的测试失败的AssertionError
from foo.bar import f2
from mock import patch
class MyTest(TestCase):
def test_f2_1(self):
with patch('project.module.f1') as some_func:
some_func.return_value = (20, False)
num, stat = f2()
self.assertEqual((num, stat), (40, False))
@patch('project.module.f1')
def test_f2_2(self, some_func):
some_func.return_value = (20, False)
num, stat = f2()
self.assertEqual((num, stat), (40, False))
第一示例表明,F1()和f2()相同的模块中定义。 因此,下面应该工作:
from foo.bar import f2
from mock import patch
class MyTest(TestCase):
@patch('foo.bar.f1')
def test_f2_2(self, some_func):
some_func.return_value = (20, False)
num, stat = f2()
self.assertEqual((num, stat), (40, False))
补丁是一样的进口: @patch('foo.bar.f1')
下面是对这个问题一个很好的答案:
http://bhfsteve.blogspot.nl/2012/06/patching-tip-using-mocks-in-python-unit.html
假设你正在使用这个模拟 libary:
def f1():
return 10, True
def f2():
num, stat = f1()
return 2*num, stat
import mock
print f2() # Unchanged f1 -> prints (20, True)
with mock.patch('__main__.f1') as MockClass: # replace f1 with MockClass
MockClass.return_value = (30, True) # Change the return value
print f2() # f2 with changed f1 -> prints (60, True)
如果您的代码模块分为你可能需要更换__main__.f1
的路径,以你的模块/功能。