Implement support for the crypto.randomUUID operation

[oleiade]

This PR addresses #20.

It adds an implementation for the crypto.randomUUID operation to the extension.

import { crypto } from "k6/x/webcrypto";

export default function () {
  const myUUID = crypto.randomUUID();

  console.log(myUUID);
}

It implements the function according to the Web Crypto API's specification. Please note that this feature is part of a restricted feature set of the API.

Under the hood, it uses Google's UUID package, version v1.2.2 like in k6, to produce UUID values.

Let me know what you think 🙇🏻

[imiric]

LGTM 👍

I would DRY the tests a bit since there's a lot of repetition, but it's not a big deal.

[oleiade]

@imiric thanks 🙇🏻

I believe I mentioned it in the tests, but those are almost verbatim copies of the Web Platform Tests covering the Web Crypto API. Thus the not dryness is not my fact 🥥