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https://issues.apache.org/jira/browse/BEAM-10697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17181512#comment-17181512
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Udi Meiri commented on BEAM-10697:
----------------------------------
Adding 1000 extra test cases makes the failures more likely. My assumption is
that another test is affecting the results so there's a better chance that some
of these will insert themselves in the correct order. (Side note: we're using
pytest-xdist which seems to non-deterministically split and order the tests
among subprocesses.)
{code}
@parameterized.expand((i,) for i in range(1000))
def test_bytestring(self, unused_param):
self.assertEqual(typehints.List[bytes],
convert_to_beam_type(typing.List[bytes]))
{code}
> Python Precommit failing due to type check failure.
> ---------------------------------------------------
>
> Key: BEAM-10697
> URL: https://issues.apache.org/jira/browse/BEAM-10697
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core, test-failures
> Reporter: Daniel Oliveira
> Assignee: Udi Meiri
> Priority: P0
> Fix For: 2.24.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Test suite: https://ci-beam.apache.org/job/beam_PreCommit_Python_Cron/
> First failure: https://ci-beam.apache.org/job/beam_PreCommit_Python_Cron/3110/
> Looks like it's failing for about a day now.
> Error:
> {noformat}
> self = <apache_beam.transforms.ptransform_test.PTransformTypeCheckTestCase
> testMethod=test_pardo_properly_type_checks_using_type_hint_decorators>
> def test_pardo_properly_type_checks_using_type_hint_decorators(self):
> @with_input_types(a=str)
> @with_output_types(typing.List[str])
> def to_all_upper_case(a):
> return [a.upper()]
>
> # If this type-checks than no error should be raised.
> d = (
> self.p
> | 'T' >> beam.Create(['t', 'e', 's', 't']).with_output_types(str)
> | 'Case' >> beam.FlatMap(to_all_upper_case))
> assert_that(d, equal_to(['T', 'E', 'S', 'T']))
> self.p.run()
>
> # Output type should have been recognized as 'str' rather than
> List[str] to
> # do the flatten part of FlatMap.
> > self.assertEqual(str, d.element_type)
> E AssertionError: <type 'str'> != Any
> apache_beam/transforms/ptransform_test.py:1182: AssertionError
> {noformat}
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