On 05/04/2021 06:25, Cameron Simpson wrote:
If you truly need to test msg() _without_ the file= parameter, you could
monkey patch module_2:
old_MSG_DESTINATION = module_2.MSG_DESTINATION
module_2.MSG_DESTINATION = sys.stderr
# now the module_2 module has an updated reference for sys.stderr
...
msg("a", "message")
...
module_2.MSG_DESTINATION = old_MSG_DESTINATION
# normality restored
I was about to write "use contextlib.redirect_sterr()", and noted my
error just before hitting send. There is a tool in the stdlib that might
work though:
from unittest import mock
with mock.patch("module_2.MSG_DESTINATION", sys.stderr):
msg("a", "message")
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