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https://issues.apache.org/jira/browse/BEAM-317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15323456#comment-15323456
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ASF GitHub Bot commented on BEAM-317:
-------------------------------------

Github user kennknowles closed the pull request at:

    https://github.com/apache/incubator-beam/pull/437


> Implement PAssert without using Side Inputs
> -------------------------------------------
>
>                 Key: BEAM-317
>                 URL: https://issues.apache.org/jira/browse/BEAM-317
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-java-core
>            Reporter: Thomas Groh
>            Assignee: Kenneth Knowles
>            Priority: Minor
>
> SideInputs are not supported equally by all runners. Implementing assertions 
> as a main input and a serialized assertion allows runner implementors to test 
> their implementations prior to constructing side inputs.
> satisfies is the same, but accumulates the entire input into a single pane 
> which it takes as a main input.
> containsInAnyOrder encodes the expected elements as they need not be 
> serializable, and then can be implemented in terms of satisfies.
> empty can be implemented by failing if provided with any elements, so long as 
> the success counter is not the means by which success is measured.



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