Running jest in docker with watch option throw me not supported without git/hg error

Do you want to request a feature or report a bug?

bug

What is the current behavior?

Running with jest --watch in docker exits with --watch is not supported without git/hg, please use --watchAll error.

Running with jest --watchAll could run test successfully, however when I am trying to update snapshot with option u or o it still exits with --watch is not supported without git/hg, please use --watchAll error.

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.

https://github.com/zushenyan/docker-jest-issue

What is the expected behavior?

Running Jest in Docker without errors like local machine.

Please provide your exact Jest configuration and mention your Jest, node, yarn/npm version and operating system.

• docker Version 17.12.0-ce-mac49 (21995)
• node 8.9.4-alpine
• jest 22.2.2
• yarn 1.3.2 (included in node:8.9.4-alpine)

[christopher-francisco]

I have the same problem, but my container DOES have git installed. I even installed watchman on it (built from source) but no luck

[zushenyan]

Actually it was me being silly~

Docker image node:8.9.4-alpine doesn’t come with git or hg utilities.

--watch is not supported without git/hg as this error says, to get Jest work with normal watch mode you will have to install these utilities manually in your image.

For anyone puzzled by this issue please take a look at this branch for solution.

Thank you guys for answering.