django1/tests/signals/test_deprecation.py

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import warnings
from django.dispatch import Signal
from django.test import SimpleTestCase
from django.utils.deprecation import RemovedInDjango40Warning
class SignalDeprecationTests(SimpleTestCase):
def test_providing_args_warning(self):
msg = (
'The providing_args argument is deprecated. As it is purely '
'documentational, it has no replacement. If you rely on this '
'argument as documentation, you can move the text to a code '
'comment or docstring.'
)
with self.assertWarnsMessage(RemovedInDjango40Warning, msg):
Signal(providing_args=['arg1', 'arg2'])
def test_without_providing_args_does_not_warn(self):
with warnings.catch_warnings(record=True) as recorded:
Signal()
self.assertEqual(len(recorded), 0)