Support "setupFilesAfterEnv"

[kayahr]

Custom matcher libraries like jest-extended suggest to load the extension by specifying setupFilesAfterEnv in the Jest configuration. This doesn't work with jest-light-runner, it is simply ignored so I have to load jest-extended in every test file manually. Maybe it would be possible to support the setupFilesAfterEnv configuration?

[nicolo-ribaudo]

Hi! Would you like to open a PR for this? We can probably:

• Get that option from config in

  jest-light-runner/src/index.js

  Lines 11 to 23 in 5258d9e

  	constructor(config) {
  	this.#config = config;
  	this.#piscina = new Piscina({
  	filename: new URL("./worker-runner.js", import.meta.url).href,
  	maxThreads: this.#config.maxWorkers,
  	env: {
  	// Workers don't have a tty; we whant them to inherit
  	// the color support level from the main thread.
  	FORCE_COLOR: supportsColor.stdout.level,
  	...process.env,
  	},
  	});

  , and pass it to Piscina using the workerData option
• In the top level of https://github.com/nicolo-ribaudo/jest-light-runner/blob/main/src/worker-runner.js, do something like const setupP = Promise.all(setupFilesAfterEnv.map(path => import(path)));
• In the worker main function at

  jest-light-runner/src/worker-runner.js

  Line 27 in 5258d9e

  export default async function ({

  , before doing anything (before port.postMessage("start");), we should await setupP to make sure that the setup files are loaded before running any test.

[nicolo-ribaudo]

Ignore the previous message. After that #21 is merge, it can be implemented in the same way that setupFiles is implemented.

[nicolo-ribaudo]

Ok, I ended up implementing this by myself in #21.