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python - 函数的monkeypatching中的setattr抛出属性错误

问题描述

我有以下代码

/tests/test_fixme.py

def make_my_patch():
    name = "Dinesh"
    return name


def test_make_patch(monkeypatch):

    monkeypatch.setattr(make_my_patch,"name","DineshKumar")

使用setattr设置name会引发属性错误。

注意：我已将这两个函数作为权宜之计放在同一个文件中，以避免模块/导入错误。

这是追溯。

================================================================== FAILURES ==================================================================
______________________________________________________________ test_make_patch _______________________________________________________________

monkeypatch = <_pytest.monkeypatch.MonkeyPatch object at 0x7fddd5675630>

    def test_make_patch(monkeypatch):

>       monkeypatch.setattr(make_my_patch,"name","DineshKumar")
E       AttributeError: <function make_my_patch at 0x7fddd5676048> has no attribute 'name'

tests/test_fixme.py:16: AttributeError
========================================================== short test summary info ===========================================================
FAILED tests/test_fixme.py::test_make_patch - AttributeError: <function make_my_patch at 0x7fddd5676048> has no attribute 'name'
============================================================= 1 failed in 0.02s ==============================================================
(testenv) user@user:~/MyGitHub/MyLearning/Python/MyUnitTests/Testing10$

如何正确修补名称属性？但是，如果我将代码放在一个类中，类变量的 setattr 就可以正常工作吗？您能否解释一下为什么它不适用于功能？

标签： pythonpython-3.xpytestmonkeypatching

解决方案

万一有人在这里结束。

您需要返回一个具有返回值的模拟对象，因此您的代码将类似于：

from unittest.mock import Mock

def make_my_patch():
    name = "Dinesh"
    return name


def test_make_patch(monkeypatch):
    monkeypatch.setattr(
        make_my_patch,
        Mock(return_value="DineshKumar")
    )

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