test: initialize test/wpt to run URL and console .js tests

This patch:

- Creates a new test suite `wpt` that can be used to run a subset
  of Web Platform Tests
- Adds a `WPTRunner` in `test/common/wpt.js` that can run the WPT
  subset in `test/fixtures/wpt` with a vm and the WPT harness
  while taking the status file in `test/wpt/status` into account.
  Here we use a new format of status file (in JSON) to handle specific
  requirements (like ICU requirements) in the tests and to handle
  expected failures and TODOs.
- Adds documentation on how the runner and the update automation works
- Runs the WHATWG URL tests and the console tests with the new test
  runner.

With this patch we eliminates the need of copy-pasting with manual
modifications to update a large chunk of our WPT subset previously
maintained in `test/parallel`. Now the tests run in `test/wpt` can
be automatically updated with `git node wpt` without modifications
by the actual WPT harness instead of our home-grown mock.

There are still a few URL tests left that need to be migrated in the
upstream to be placed in .js instead of .html - we currently still use
the legacy harness mock in the test files.

PR-URL: #24035
Refs: #23192
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>

Makefile

@@ -496,6 +496,9 @@ test-debug: test-build
 test-message: test-build
 	$(PYTHON) tools/test.py $(PARALLEL_ARGS) message
 
+test-wpt: all
+	$(PYTHON) tools/test.py $(PARALLEL_ARGS) wpt
+
 test-simple: | cctest bench-addons-build  # Depends on 'all'.
 	$(PYTHON) tools/test.py $(PARALLEL_ARGS) parallel sequential
 

test/common/README.md

@@ -772,12 +772,19 @@ Deletes and recreates the testing temporary directory.
 
 ## WPT Module
 
-The wpt.js module is a port of parts of
-[W3C testharness.js](https://github.com/w3c/testharness.js) for testing the
-Node.js
-[WHATWG URL API](https://nodejs.org/api/url.html#url_the_whatwg_url_api)
-implementation with tests from
-[W3C Web Platform Tests](https://github.com/w3c/web-platform-tests).
+### harness
+
+A legacy port of [Web Platform Tests][] harness.
+
+See the source code for definitions. Please avoid using it in new
+code - the current usage of this port in tests is being migrated to
+the original WPT harness, see [the WPT tests README][].
+
+### Class: WPTRunner
+
+A driver class for running WPT with the WPT harness in a vm.
+
+See [the WPT tests README][] for details.
 
 
 [<Array>]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array
@@ -792,3 +799,5 @@ implementation with tests from
 [`hijackstdio.hijackStdErr()`]: #hijackstderrlistener
 [`hijackstdio.hijackStdOut()`]: #hijackstdoutlistener
 [internationalization]: https://github.com/nodejs/node/wiki/Intl
+[Web Platform Tests]: https://github.com/web-platform-tests/wpt
+[the WPT tests README]: ../wpt/README.md