[jira] [Resolved] (BEAM-85) PAssert needs sanity check that it's used correctly

["Kenneth Knowles (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-85?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kenneth Knowles resolved BEAM-85.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 0.5.0-incubating

When used as a `@Rule` this is now the case. Now we need to port the tests, which I'd say fits more into BEAM0-298 or potentially a new ticket.

> PAssert needs sanity check that it's used correctly
> ---------------------------------------------------
>
>                 Key: BEAM-85
>                 URL: https://issues.apache.org/jira/browse/BEAM-85
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-java-core
>            Reporter: Daniel Halperin
>            Assignee: Stas Levin
>             Fix For: 0.5.0-incubating
>
>
> We should validate two things:
> # DataflowAssert is not added to a pipeline that has already been run.
> # The pipeline is run after the DataflowAssert is added.
> If either of these are not validated, then it is possible that the test doesn't actually verify anything.
> This code should throw an assertion error or fail in some other way.
> {code}
> Pipeline p = TestPipeline.create();
> PCollection<Boolean> value = p.apply(Create.of(Boolean.FALSE));
> p.run();
> DataflowAssert.thatSingleton(value).isEqualTo(true);
> {code}
> but it would pass silently.
> similarly, this code wills pass silently:
> {code}
> Pipeline p = TestPipeline.create();
> PCollection<Boolean> value = p.apply(Create.of(Boolean.FALSE));
> DataflowAssert.thatSingleton(value).isEqualTo(true);
> {code}



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