Cannot use jest --watch without SCM

[cyphernull]

Do you want to request a feature or report a bug?
bug
What is the current behavior?
When I run yarn test --watch , it's never going to work. and reports many errors.



My package.json file:

"scripts": {
    "build": "webpack",
    "dev-server": "webpack-dev-server",
    "test":"jest"
  },

I followed someones' guide that run yarn test -- --watch still not working.
It's my first time using a testing tool, is there anything ignored?
If the current behavior is a bug, please provide the steps to reproduce and either a repl.it demo through https://repl.it/languages/jest or a minimal repository on GitHub that we can yarn install and yarn test.

What is the expected behavior?

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system.
Jest : 21.2.1
node : 8.5.0
yarn : 1.2.1
system: macOS High Sierra 10.13

[thymikee]

Looks like you don't run in git/mercury repository? cc @aaronabramov

[cyphernull]

@thymikee yep, --watch works after repository initialized。

[SimenB]

Duplicate of #4419

[github-actions]

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