Logging gobbled up after pytest.main executed

[westhomas]

I'm having some issues with my logs being gobbled up after I execute pytest.main. But it seems to be related to using logging.config.dictConfig. When I manually configure my logging, it seems to work.

Overall, I'm just confused as to what's going on. Here's a sample. logging_option1 works while logging_option2 does not.

# test_pytestmain.py
import logging

logger = logging.getLogger(__name__)

def logging_option1():
    logger.setLevel(logging.DEBUG)
    ch = logging.StreamHandler()
    logger.addHandler(ch)

def logging_option2():
    import logging.config
    LOGGING = {
        'version': 1,
        'disable_existing_loggers': False,
        'handlers': {
            'console': {
                'class': 'logging.StreamHandler',
            }
        },
        'loggers': {
            '': {
                'handlers': ['console'],
                'level': 'DEBUG',
            }
        }
    }
    logging.config.dictConfig(LOGGING)


def test_dummy():
    logger.info("LOG: inside test")
    assert True



# THIS WORKS
logging_option1()

# THIS DOESN'T
# logging_option2()


if __name__ == '__main__':

    logger.info("LOG: test starting")

    import pytest
    returncode = pytest.main([
        "test_pytestmain.py"
    ])

    logger.info("LOG: test ended with return code: %s", returncode)

[nicoddemus]

Hmm unfortunately logging configuration is always global so it might be tricky to "undo" the changes in configuration that pytest does to capture logging. A few things to try:

1. Disable the logging plugin in case you are not really interested on it: returncode = pytest.main(["test_pytestmain.py", '-p', 'no:logging'])
2. Test the features branch, this might be related with logging.py: Don't change log level of the root logger to bigger numeric value #3307. To install the features branch:

   pip install git+https://github.com/pytest-dev/pytest.git@features