Extending the Jest default runner to run tests serially by default
--- Simple wrapper over the default Jest runner that forces serial execution of test files. This is equivalent to running with `--runInBand` flag by default. **Why?** Sometimes you have limited/restricted resources on the test machine (like in a docker container) and running the default `jest-runner` always runs in parallel unless specified otherwise. Integration tests are another scenario where running concurrent instances causes issues so using this runner ensures only 1 test runs at a time. ## Installation ```sh npm install @codejedi365/jest-serial-runner --save-dev ``` ## Usage **Option 1:** Specify the runner in your `Jest` config ```jsonc /* jest.config.json */ { // ... "runner": "@codejedi365/jest-serial-runner" // ... } ``` **Option 2:** To specify the runner for a subset of files such as for integration tests. ```js /* jest.config.js */ module.exports = { // ... projects: [ { // Uses the jest default runner for specification testing displayName: "UNIT", testMatch: ["