Mac OS test watcher failing

Is this a bug report?

I believe this is a bug. I’m just not sure who’s?

Did you try recovering your dependencies?

I have tried this by using only npm.

Which terms did you search for in User Guide?

Error watching file for changes: EMFILE

Environment

1. node -v: 8.10.0 and 9.9.0
2. npm -v: 5.7.1
3. yarn --version (if you use Yarn):
4. npm ls react-scripts (if you haven’t ejected):

Then, specify:

1. Operating system: Mac OS High Siera
2. Browser and version (if relevant):

Steps to Reproduce

https://github.com/mnemanja/failing-tests-repo

1. Clone repo
2. Install
3. Run tests

From the list of 3 (currently found) problematic dependencies removing one makes the tests watcher work properly:

• node-sass-chokidar: 1.2.2
• material-ui: 0.20.0
• enzyme: 3.3.0

Expected Behavior

Tests should be successfully executed and the watch mode should be active.

Actual Behavior

The watch mode exists and error messages are shown.

Reproducible Demo

https://github.com/mnemanja/failing-tests-repo

I have also created similar reports on all involved repos: https://github.com/michaelwayman/node-sass-chokidar/issues/50 https://github.com/airbnb/enzyme/issues/1593 https://github.com/mui-org/material-ui/issues/10801

I have tried installing the Watchman via brew, as per many suggestions found in this repo and several others, but after the installation, nothing has changed.

[gaearon]

This problem was solved in more recent Jest versions, which you can use through our 2.x alpha. Instructions: https://github.com/facebook/create-react-app/issues/3815

Unfortunately there’s no fix coming for the 1.x branch of react-scripts. So your best bet is to either start using 2.x alphas (warning: they’re somewhat unstable) or to keep trying different workarounds in the threads you linked to.

[yashka713]

@mnemanja brew install watchman solve my problem, but before I had the same Issue. "test": "react-scripts test --env=jsdom I, also, have this line Maybe, you should remove node_modules yarn.lock package.json.lock(if present) And start yarn to recreate dependency?