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https://issues.apache.org/jira/browse/BEAM-1884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17546379#comment-17546379
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Kenneth Knowles commented on BEAM-1884:
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This issue has been migrated to https://github.com/apache/beam/issues/18251
> Add DataflowRunner unit tests
> -----------------------------
>
> Key: BEAM-1884
> URL: https://issues.apache.org/jira/browse/BEAM-1884
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Ahmet Altay
> Priority: P3
> Labels: beam-fixit
>
> DataflowRunner does not have enough unit test coverage. This resulted in a
> silent failure where dataflow job graph was malformed for UI to display but
> job still completed
> (https://pantheon.corp.google.com/dataflow/job/2017-03-31_21_56_13-6233023862008864856?project=apache-beam-testing&organizationId=433637338589)
> It was a simple fix (https://github.com/apache/beam/pull/2429) that could be
> caught by a unit test to check step names are not empty.
> Also note that it is possible to use `dataflow_job_file` flag to create job
> files only without actually running jobs for the purpose of unit testing.
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