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https://issues.apache.org/jira/browse/FLINK-1595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14526565#comment-14526565
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ASF GitHub Bot commented on FLINK-1595:
---------------------------------------

Github user szape commented on the pull request:

    https://github.com/apache/flink/pull/520#issuecomment-98689457
  
    Of course, I'm on it.
    I agree, separate tests would be much better. I'll try
    MiltipleProgramsTestBase for that purpose.
    
    Peter
    
    2015-05-04 10:21 GMT+02:00 Márton Balassi <notificati...@github.com>:
    
    > Hey,
    >
    > Sorry for not attending to this for a long time. It needed a rebase for
    > the API of the chaining. Now that I have updated that the test throws the
    > following NPE:
    >
    > Caused by: java.lang.NullPointerException
    > at
    > 
org.apache.flink.streaming.api.complex.ComplexIntegrationTest$MyTimestamp.getTimestamp(ComplexIntegrationTest.java:659)
    > at
    > 
org.apache.flink.streaming.api.complex.ComplexIntegrationTest$MyTimestamp.getTimestamp(ComplexIntegrationTest.java:654)
    > at
    > 
org.apache.flink.streaming.api.windowing.helper.TimestampWrapper.getTimestamp(TimestampWrapper.java:34)
    > at
    > 
org.apache.flink.streaming.api.windowing.windowbuffer.SlidingTimePreReducer.afterEmit(SlidingTimePreReducer.java:71)
    > at
    > 
org.apache.flink.streaming.api.windowing.windowbuffer.SlidingPreReducer.emitWindow(SlidingPreReducer.java:59)
    > ... 7 more
    >
    > It would be nice if we could separate the individual tests, so it is
    > easier to track an exception like that. Maybe a solution similar to
    > MiltipleProgramsTestBase for streaming would do the trick.
    >
    > @szape <https://github.com/szape>, could you please do an update with
    > these, then I'd merge it asap so that it does not get outdated again.
    > Thanks.
    >
    > —
    > Reply to this email directly or view it on GitHub
    > <https://github.com/apache/flink/pull/520#issuecomment-98628873>.
    >



> Add a complex integration test for Streaming API
> ------------------------------------------------
>
>                 Key: FLINK-1595
>                 URL: https://issues.apache.org/jira/browse/FLINK-1595
>             Project: Flink
>          Issue Type: Task
>          Components: Streaming
>            Reporter: Gyula Fora
>            Assignee: Péter Szabó
>              Labels: Starter
>
> The streaming tests currently lack a sophisticated integration test that 
> would test many api features at once. 
> This should include different merging, partitioning, grouping, aggregation 
> types, as well as windowing and connected operators.
> The results should be tested for correctness.
> A test like this would help identifying bugs that are hard to detect by 
> unit-tests.



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