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https://issues.apache.org/jira/browse/TAP5-2239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14103610#comment-14103610
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Jochen Kemnade commented on TAP5-2239:
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Can you think of a way to do this in a cross-browser fashion? Maybe we can 
exchange the {{t5/core/console}} module for the tests?

> T5.4 Detect javascript errors while running selenium tests
> ----------------------------------------------------------
>
>                 Key: TAP5-2239
>                 URL: https://issues.apache.org/jira/browse/TAP5-2239
>             Project: Tapestry 5
>          Issue Type: Improvement
>    Affects Versions: 5.4
>            Reporter: Chris Poulsen
>              Labels: patch
>         Attachments: Check_browser_javascript_errors.patch, 
> [email protected]
>
>
> I've been wondering why it wasn't possible for selenium-based tests to report 
> back javascript errors as test failures, as they usually indicate some kind 
> of error.
> Taking yet another swing at this a couple of days ago I stumbled upon a 
> firefox plugin (https://github.com/mguillem/JSErrorCollector - Apache v2 
> licensed) for collecting javascript console errors.
> The plugin is made for webdriver, but it was trivial to get it going with 
> selenium1.
> The attached patch registers a testng listener that after each successful 
> selenium test checks to see if an error was registered in the browser 
> console. In case an error happened; the test success is changed to a failure 
> and some info from the console is set as the throwable.
> To get things going apply the attached patch, and drop the attached xpi into 
> the tapestry-core/src/test/conf/ff_profile_template/extensions folder.
> Then run the core tests. The plugin can be used the other selenium tests by 
> providing the extensions folder in their src/test/conf/ff_profile_template
> This test add-on exposes the ajaxformloop failure reported as TAP5-2228 and 
> TAP5-2230, a place or two where something fails with requirejs related error 
> and one or two other trivialities on my windows machine.



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