[jira] [Created] (FLINK-4002) [py] Improve testing infraestructure

[Shang Yuanchun (Jira)]

Omar Alvarez created FLINK-4002:
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             Summary: [py] Improve testing infraestructure
                 Key: FLINK-4002
                 URL: https://issues.apache.org/jira/browse/FLINK-4002
             Project: Flink
          Issue Type: Bug
          Components: Python API
    Affects Versions: 1.0.3
            Reporter: Omar Alvarez
            Priority: Minor


The Verify() test function errors out when array elements are missing:

{code:python}
env.generate_sequence(1, 5)\
         .map(Id()).map_partition(Verify([1,2,3,4], "Sequence")).output()
{code}

{quote}
IndexError: list index out of range
{quote}

There should also be more documentation in test functions.



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