Bazel rules for jest

Runs tests with the https://jestjs.io/ test runner under Bazel.

Many companies are successfully testing with rules_jest. If you're getting value from the project, please let us know! Just comment on our Adoption Discussion.

rules_jest is just a part of what Aspect provides:

• Need help? This ruleset has support provided by https://aspect.build/services.
• See our other Bazel rules, especially those built for rules_js, such as rules_ts for TypeScript: https://github.com/aspect-build

Follow instructions from the release you wish to use: https://github.com/aspect-build/rules_jest/releases

Run all Jest tests in the workspace: bazel test --test_lang_filters=jest //...

Filter tests by file path: bazel test --test_filter="user" //my:test (uses Jest's testRegex)

See jest_test API documentation and the example usages in the example folder.

Note that the example also relies on code in the /MODULE.bazel file in the root of this repo.

For troubleshooting and common challenges, see docs/troubleshooting.md.