testing: allow to instantiate an empty AsyncTestCase #3374
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unittest.TestCase
has a feature where it allows instantiatingMyTestClass()
with the default method namerunTest
even if arunTest
method doesn't actually exist. This is documented inTestCase
's docs under "Changed in version 3.2" (link).Since version 8.2, pytest relies on this, and started breaking on Tornado's
AsyncTestCase
, see pytest-dev/pytest#12263.Change
AsyncTestCase
to allow empty instatiation, by matching the upstream code.