python install_error ai_generated true

fixture 'mocker' 未找到可用 fixtures: cache, capfd, capsys, ...

fixture 'mocker' not found available fixtures: cache, capfd, capsys, ...

ID: python/pytest-mock-not-installed

其他格式: JSON · Markdown 中文 · English

80%修复率

90%置信度

0证据数

2024-03-27首次发现

版本兼容性

版本	状态	引入	弃用	备注
3.10	active	—	—	—
3.11	active	—	—	—
3.12	active	—	—	—

根因分析

`mocker` fixture 由 pytest-mock 提供，但未安装或不在当前激活的环境中。

English

The `mocker` fixture is provided by pytest-mock, which is not installed or not in the active environment.

generic

解决方案

98% 成功率

pip install pytest-mock
# or
poetry add --group dev pytest-mock
# or
uv add --dev pytest-mock

90% 成功率

from unittest import mock

def test_x():
    with mock.patch('myapp.views.requests.get') as m:
        m.return_value.json.return_value = {}
        myapp.views.fetch()

无效尝试

常见但无效的做法:

95% 失败
mock is a module, not a fixture; pytest tries to resolve it as a fixture and fails.
90% 失败
Returns the module, not a MagicMock controller; tests expecting `mocker.patch` fail with AttributeError.
90% 失败
pytest runs in the currently active env; installing elsewhere doesn't make the fixture available.