Watch mode

[jperl]

It would be nice to have a watch mode that automatically re-runs tests when the file is saved similar to cypress. #6

• Allow the user to keep the browser open and close it when the file is re-run
• After hook to allow cleanup (ideally the same ones in beforeAll/afterAll #8 setup/teardown #9)

[JoelEinbinder]

This should mostly work out of the box today!

Keeping the browser open requires global cleanup for Jest runners. I filed it as jestjs/jest#9795 and they seem open to it.

[jperl]

It's a total hack but we implemented this behavior in qawolf by creating a Jest watch plugin. We use shouldRunTestSuite to send a command via a tcp server to the test to close the browser. I would love to get rid of this and swap it out for playwright-runner.

[laurentpayot]

I use the following npm scripts to implement this behaviour with chokidar-cli:

"test:e2e": "cd tests/e2e && folio --workers `grep -c ^processor /proc/cpuinfo` --param screenshotOnFailure",
"test:e2e:watch": "npm run test:e2e ; cd tests/e2e && chokidar './**/*.ts' -c 'echo \"\n{path} was modified\n\" && cd ../.. && npm run test:e2e -- --test-match \"{path}\"'",

but it is nothing compared to the watch options Jest spoils us with.

@mxschmitt don't you think this issue should be re-opened?

[mxschmitt]

yeah lets open I guess.

[mxschmitt]

Closing as duplicate of https://github.com/microsoft/folio/issues/150 we track it there.