Running CRA Jest in non-interactive mode

问题:

Update: my use case is mainly to run tests at CI, but overriding default CRA Jest parameters is something I'm generally wondering about.

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I'm running tests using the Jest, config that came with Create React App. It always launches into the interactive mode:

 › Press a to run all tests.
 › Press o to only run tests related to changed files.
 › Press p to filter by a filename regex pattern.
 › Press q to quit watch mode.
 › Press Enter to trigger a test run.

But I don't want it to wait for my input. I want it to run once and then terminate. I tried using the --bail or --no-watchman switches but it still launches in interactive mode.

If I globally install jest, and run it in the root of my project, it executes once and finish (just as I want). But when I run npm test which runs react-scripts test, it goes into the watch mode even when I'm not passing --watch.

Update: I've also filed an issue on CRA.

回答1:

CRA looks for a CI environment variable, if its present it doesn't run in watch mode.

CI=true npm test should do what you are looking for

See the User Guide -> Running Tests -> On your own environment

UPDATE For non-ci, eg running tests locally, from react-scripts@2.1.4 you can pass a --no-watch flag:

npm test --no-watch