小编Ric*_*man的帖子

首先，我的项目目录的相关部分如下所示：

??? my_package
    ??? my_subpackage
    ?   ??? my_module.py
    |   ??? other_module.py
    ??? tests
        ??? my_subpackage
            ??? unit_test.py

我正在编写一些测试unit_test.py，需要在模块级别模拟外部资源。我想使用pytest fixture模块级范围并pytest monkeypatch完成此操作。这是我尝试过的片段unit_test.py：

import unittest.mock as mock
import pytest
from my_package.my_subpackage.my_module import MyClass


@pytest.fixture(scope='function')
def external_access(monkeypatch):
    external_access = mock.MagicMock()
    external_access.get_something = mock.MagicMock(
        return_value='Mock was used.')
    monkeypatch.setattr(
        'my_package.my_subpackage.my_module.ExternalAccess.get_something',
        external_access.get_something)


def test_get_something(external_access):
    instance = MyClass()
    instance.get_something()
    assert instance.data == 'Mock was used.'

一切正常。但是当我尝试将第 8 行从 更改@pytest.fixture(scope='function')为 时@pytest.fixture(scope='module')，出现以下错误。

ScopeMismatch: You tried to access the …