python module_error ai_generated true

AssertionError: 预期 'send_email' 被调用一次。实际调用 0 次。

AssertionError: Expected 'send_email' to have been called once. Called 0 times.

ID: python/unittest-mock-method-not-called

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80%修复率

89%置信度

0证据数

2024-03-29首次发现

版本兼容性

版本	状态	引入	弃用	备注
3.x	active	—	—	—

根因分析

被测函数调用的是导入到其自身模块中的名称（`from myapp.mail import send_email`），但测试补丁了 `myapp.mail.send_email`。本地绑定仍指向原始函数。

English

The function under test calls a name that was imported into its own module (`from myapp.mail import send_email`), but the test patched `myapp.mail.send_email`. The local binding still points to the original function.

generic

解决方案

95% 成功率

from unittest import mock

# services.py does: from myapp.mail import send_email
def test_signup():
    with mock.patch("myapp.services.send_email") as fake_send:
        signup("[email protected]")
        fake_send.assert_called_once_with("[email protected]")

88% 成功率

# services.py
import myapp.mail as mail

def signup(email):
    mail.send_email(email)

# test
with mock.patch("myapp.mail.send_email") as fake_send:
    signup("[email protected]")

无效尝试

常见但无效的做法:

85% 失败
The mock was never invoked; changing args doesn't help.
60% 失败
Works only if you patch the correct binding; patching the definition module alone is a no-op for the caller.