Jest: Be able to temporarily pause test --watch runner.
š Feature Proposal
Provide a way to pause --watch mode so it stops listening to changes without actually killing the process.
Motivation
Watch mode is super useful, and I often find it repeatedly running up to a hundred related tests while I'm refactoring stuff and toggling among windows. It'd be great to tell it to chill out, pause, and then resume when prompted without actually killing/restarting the process.
It seems simple into to just quit and restart, but I was just surprised there isn't a way to simple tell it to simmer down for a period of time.
AndrewSouthpaw
All 12 comments
Really cool - can this be done with a custom watch mode plugin?
rickhanlonii
on 20 Jun 2018
You can work around it by setting a dummy test path/name. It'll still watch, but not trigger any tests.
Not sure if it's possible to do currently without a hack like that. Might need a change in core first? Haven't dug into it, though
SimenB
on 20 Jun 2018
I've never poked around in the source of Jest, but you if you have any suggestions on where to start I'd be happy to look into it.
AndrewSouthpaw
on 27 Jun 2018
Based on @SimenB idea, one could create a watch plugin passing empty testNamePattern to config like here: https://github.com/jest-community/jest-watch-typeahead/blob/1b6dbfb4237b07a5c96716f418a621ac72ac9871/src/test_name_plugin/plugin.js#L52
thymikee
on 6 Jul 2018
A plugin should be able to achieve this... Iāll add more details later tonight.
The basic idea would be āpress s to pauseā and that would clear the screen and show you a message saying āJest is paused, press any key to resumeā
rogeliog
on 6 Jul 2018
It would be very useful for Jest Puppeteer. Actually we have jestPuppeteer.debug() but it does not stop the test completely. Do you have a current solution to pause a test (avoiding timeout)?
gregberge
on 15 Aug 2018
You are probably thinking of something different. I'm proposing a feature to pause the watch functionality, not to pause a test.
AndrewSouthpaw
on 16 Aug 2018
Yes I am thinking about a way to pause a test. I will open another issue.
gregberge
on 16 Aug 2018
+1
surfjedi
on 28 Sep 2018
+1
bmeeder22
on 31 Oct 2018
This can be implemented as a custom watch plugin, see https://jestjs.io/docs/en/watch-plugins
If anybody does this, please send a PR to awesome-jest to add it to the list of watch plugins there!
SimenB
on 31 Oct 2018
For reference: This is now implemented by this plugin https://github.com/unional/jest-watch-suspend
rogeliog
on 28 Jun 2019
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Most helpful comment
A plugin should be able to achieve this... Iāll add more details later tonight.
The basic idea would be āpress s to pauseā and that would clear the screen and show you a message saying āJest is paused, press any key to resumeā