tests: new typescript WPT runner

[lucacasonato]

This is a new WPT runner, written in TypeScript. It is a lot more advanced than the integration test for WPT we had previously.

1. It can auto setup /etc/hosts.
2. It can run only a subset of tests.
3. It can automatically update test expectations based on reality.
4. It can output JSON for consumption by deno.land (not yet integrated).
5. A lot easier to extend in the future.
6. Uses HTML WPT tests (from the WPT test util) and parses out scripts using a WASM based DOM parser, instead of trying to do all of the resolving of meta comments ourselves.

---

TODO:

• automatically acquire manifest.json
• run filtering: wpt.ts run -- encoding
• wpt.ts setup to auto configure /etc/hosts file and check correct python version
• wpt.ts update to update the expectation.json based on currently passing tests
• filtering for wpt.ts update
• move tools/wpt/readme.md to manual, and expand

[lucacasonato]

@kitsonk @bartlomieju @ry @kt3k @piscisaureus @bnoordhuis Please try this out locally:

./tools/wpt.ts setup
./tools/wpt.ts run --quiet

I want to make sure it actually works for everyone before proceeding.

[kt3k]

Is this section necessary? test_util/wpt in .gitmodules seems still pointing to the upstream.

[lucacasonato]

Probably not, but I think it doesn't hurt to be clear about it.

[kt3k]

sudo ./tools/wpt.ts setup worked great without prompt issues, and ./tools/wpt.ts run worked and passed without any problem on my machine! great job!

The instruction and the error messages look great. I hope this addresses the issues concerning new contributors.

[ry]

Nit: if I haven't compiled Deno yet, I get an error which is difficult to understand:

~/src/deno> ./tools/wpt.ts run --quiet
Going to run 186 test files.
----------------------------------------
/WebCryptoAPI/getRandomValues.any.html

error: Uncaught (in promise) NotFound: No such file or directory (os error 2)
    throw new ErrorClass(res.err.message);
          ^
    at processResponse (deno:core/core.js:212:11)
    at Object.jsonOpSync (deno:core/core.js:235:12)
    at opRun (deno:runtime/js/40_process.js:19:17)
    at Object.run (deno:runtime/js/40_process.js:103:17)
    at runSingleTest (runner.ts:70:21)
    at async wpt.ts:154:22
    at async runWithTestUtil (runner.ts:35:12)
    at async run (wpt.ts:149:19)
    at async wpt.ts:48:5

[ry]

Works for me.

[lucacasonato]

@ry Addressed this by automatically invoking cargo build before starting the tests now.