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https://issues.apache.org/jira/browse/DERBY-6642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14048024#comment-14048024
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Dag H. Wanvik commented on DERBY-6642:
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The patch works by always collecting columns and rows as they are read. The
method JDBC#addRsToReport takes these collections and what's left of the result
set and formats a dump of the result set and adds it to the text of already
existing assertion failure. This is then (re)thrown.
> Make the JUnit result set assertion methods dump the actual rs when assertion
> fails
> -----------------------------------------------------------------------------------
>
> Key: DERBY-6642
> URL: https://issues.apache.org/jira/browse/DERBY-6642
> Project: Derby
> Issue Type: Improvement
> Components: Test
> Reporter: Dag H. Wanvik
> Attachments: derby-6642.diff
>
>
> Often, when researching intermittent regression test errors, an assertion on
> a result set fails, but the error report only shows which column in which row
> first fails to meet expectations. It would be good if the assertion methods
> could dump the actual result set in such cases so we'd have more information
> to go on when trying to understand the cause of the problem.
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