python config_error ai_generated true

AssertionError: assert 'expected message' in [] 其中 [] = caplog.messages

AssertionError: assert 'expected message' in [] where [] = caplog.messages

ID: python/pytest-caplog-not-captured

其他格式: JSON · Markdown 中文 · English

80%修复率

85%置信度

0证据数

2024-10-03首次发现

版本兼容性

版本	状态	引入	弃用	备注
7.x	active	—	—	—
8.x	active	—	—	—

根因分析

被测代码使用的 logger 设置了 propagate=False，或日志配置使用了绕过根 logger 的 handler，导致 caplog 的根 handler 从未收到日志记录。

English

The logger used by the code under test has propagate=False, or logging was configured with a handler that bypasses the root logger, so caplog's root handler never receives the record.

generic

解决方案

90% 成功率

def test_x(caplog):
    logging.getLogger('myapp').propagate = True
    with caplog.at_level(logging.INFO, logger='myapp'):
        run()
    assert 'expected message' in caplog.text

92% 成功率

import logging

def test_x():
    records = []
    h = logging.Handler()
    h.emit = records.append
    log = logging.getLogger('myapp')
    log.addHandler(h)
    try:
        run()
    finally:
        log.removeHandler(h)
    assert any('expected' in r.getMessage() for r in records)

无效尝试

常见但无效的做法:

85% 失败
Level is not the issue if propagate=False; the record never reaches the root logger's handlers regardless of level.
90% 失败
Both attributes are populated from the same captured records; an empty capture yields empty results in either.