Port code from jest-preset-stylelint

[ybiquitous]

Which issue, if any, is this issue related to?

Closes #1

Is there anything in the PR that needs further explanation?

See https://github.com/stylelint/jest-preset-stylelint

Note: I don't think global features like getTestRule() are needed at this time.

[ybiquitous]

Porting is done. Feedback welcome. 🙏🏼

[jeddy3]

Amazing! This is fantastic, thank you.

I've ported stylelint-scales to it:
jeddy3/stylelint-scales#94

It all looks good to me. My only suggestion is to use a minor release number.

I think we can merge, release and then add something to the migration guide, e.g.:

---

If you get a segmentation fault while running the preset on Node.js 18, you can use jest-light-runner:

export default {
  preset: "jest-preset-stylelint",
  setupFiles: ["./jest.setup.js"],
+ runner: "jest-light-runner",
};

Alternatively, you can try our new stylelint-test-rule-node package that uses the test runner and assertions built into Node.js:

// my-plugin.test.js
+ import { testRule } from "stylelint-test-rule-node";

testRule({
 /* .. */
})

{
  "scripts": {
+    "test": "node --test"
-    "test": "jest"
  }
}

[ybiquitous]

Thanks for the review! I'll release the first version 0.1.0 soon. 🚀

[ybiquitous]

Released! https://www.npmjs.com/package/stylelint-test-rule-node