I am trying to use caplog in pytest to capture logs when unit testing my IO manager but the caplog doesn't show anything from dagster (only vanilla python logging output) I tried using:

with caplog.at_level(logging.DEBUG, logger="dagster.builtin"):
    manager.handle_output(context, obj)
...

But that doesn't capture anything. Is there something I am doing wrong / is there a way to inspect the dagster logs so I can assert some messages being logged?

hi @martin o leary -- I think using capsys and examining the stderr stream will yield better results here. You'll only get log messages flowing through the standard python logging stream when using

get_dagster_logger()

(this is circumvented when using

context.log()

)

Brilliant @owen that did it thanks!!