我如何修补/模拟logging.getlogger()

问题描述

我有要测试的代码:

log = logging.getLogger(__name__)


class A(object):
    def __init__(self):
        log.debug('Init')

但是我不知道如何断言log.debug是用'Init'调用的

but I cannot figure out how to assert that log.debug was called with 'Init'

我尝试修补记录器，但检查它却只发现了一个getLogger模拟.

I tried patching logger but inspecting it I only found a getLogger mock.

我确定它很简单，但我只是想不通！

I'm sure its simple, but I just cant figure it!

在此先感谢您提供所有帮助！

Thanks in advance for any and all help!

推荐答案

替代解决方案，通过该解决方案，您还可以验证自己是否使用了正确的记录器:

Alternative solution, which lets you verify that you're using the correct logger too:

logger = logging.getLogger('path.to.module.under.test')
with mock.patch.object(logger, 'debug') as mock_debug:
    run_code_under_test()
    mock_debug.assert_called_once_with('Init')

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