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Add information about how to use Node debugger #1663

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Sep 10, 2016
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@skevy skevy commented Sep 10, 2016

This adds information in the troubleshooting section about how to use the Chrome inspector in Node versions greater than or equal to 6.3 to debug Jest tests.

Relevant to this tweet: https://twitter.com/cpojer/status/774440000553226240

This adds information in the troubleshooting section about how to use the Chrome inspector in Node versions greater than or equal to 6.3 to debug Jest tests.

Relevant to this tweet: https://twitter.com/cpojer/status/774440000553226240
@ghost ghost added the CLA Signed ✔️ label Sep 10, 2016
@cpojer cpojer merged commit 9b6304a into jestjs:master Sep 10, 2016
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cpojer commented Sep 10, 2016

you are the best! I shall invite you to a nice dinner and/or beer.


Place a `debugger;` statement in any of your tests, and then, in your project's directory, run:

`node --debug-brk --inspect ./node_modules/.bin/jest --i [any other arguments here]`
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Shouldn't be -i instead of --i?

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@Kerumen could you get this to work? I tried with node 6.5, it never stops at my debugger; line :-( I tried -i as well. thanks.

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the help says -i is correct

 --runInBand, -i                 Run all tests serially in the current process
                                  (rather than creating a worker pool of child
                                  processes that run tests). This is sometimes
                                  useful for debugging, but such use cases are
                                  pretty rare.                         [boolean]

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Yes, same here. I just read the PR and found this --i weird. But indeed after testing, it also never stops at my debugger; line.

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This problem listed here #1652

It will work if you use node debug --debug-brk ./node_modules/.bin/jest -i command

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oops, it was late last night and I was exhausted so I made a typo when I fixed up another typo by @skevy :D Fixed it now. -i is the right command.

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@maximderbin does it allow chrome debugger to connect with node debug. Which url should I use? tried http://127.0.0.1:5858/

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I feel like it's only nodejs repl...without inspector

tushardhole pushed a commit to tushardhole/jest that referenced this pull request Aug 21, 2017
* Add information about how to use Node debugger

This adds information in the troubleshooting section about how to use the Chrome inspector in Node versions greater than or equal to 6.3 to debug Jest tests.

Relevant to this tweet: https://twitter.com/cpojer/status/774440000553226240

* Update Troubleshooting.md
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5 participants