Can I use WORKDIR in my Dockerfile with Github Actions?
I am switching from one CI provider to Github Actions and found that I had a step that runs docker run <temp_image> npm test -- --coverage and something seemed to be altering the way my Jest test were run, compared to my previous CI, and I would receive the error:
No tests found, exiting with code 1
Run with `--passWithNoTests` to exit with code 0
In /app
18 files checked.
testMatch: /**/?(*.)+(spec|test).[jt]s?(x) - 1 match
testPathIgnorePatterns: /.next/, /node_modules/, /testconfig/ - 16 matches
testRegex: - 0 matches
Pattern: - 0 matches
That one testMatch would run correctly in my previous CI solution, using the same command.
Some with this error were accidentally ignoring their test path : Jest No Tests found
I tried a bunch of different approaches -- the main hunch being that my tests were being run in the incorrect directory. Using my shotgun approach I tried:
- Specifying <rootdir> for testMatch and testPathIgnorePatterns
- Removing testPathIgnorePatterns altogether
- Specifying the --config path, also --no-cache, options for Jest
- Specifying the -w working directory on docker run options
- And a multi-command approach for docker run
/bin/sh/ (cd /app && npm test)
Ultimately, I found this line in Github Actions Docs: Dockerfile Instructions And Overrides
GitHub sets the working directory path in the GITHUB_WORKSPACE environment variable. It's recommended to not use the WORKDIR instruction in your Dockerfile.
Removing the WORKDIR instruction in my Dockerfile fixes my error
BUT, Is there a way around having to remove WORKDIR from my Dockerfile? It seems to maybe be a Docker best practice to use WORKDIR and I would prefer to follow Docker guidelines than Github Actions.
Thank you for your time!
