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https://issues.apache.org/jira/browse/FLINK-4002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15314030#comment-15314030
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ASF GitHub Bot commented on FLINK-4002:
---------------------------------------

Github user omaralvarez commented on the issue:

    https://github.com/apache/flink/pull/2063
  
    Sorry, I said it wrong, it's the opposite. The case that fails in Verify() 
and Verify2(), is when we have more values in expected than in the resulting 
DataSet.


> [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
>              Labels: Python, Testing
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> The Verify() test function errors out when array elements are missing:
> {code}
> 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.
> I am already working on a pull request to fix this.



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