Classic workers were implemented in denoland#11338, which also enabled the WPT
tests in the `workers` directory. However, the rest of WPT worker tests
were not enabled because a number of them were hanging due to
web-platform-tests/wpt#29777. Now that that WPT issue is fixed, the bulk
of worker tests can be enabled.
There are still a few tests that hang, and so haven't been enabled. In
particular:
- The following tests seem to hang because a promise fails to resolve.
We can detect such cases in non-worker tests because the process will
exit without calling the WPT completion callback, but in worker tests
the worker message ops will keep the event loop running. This will be
fixed when we add timeouts to WPT tests (denoland#9460).
- `/fetch/api/basic/error-after-response.any.worker.html`
- `/html/webappapis/microtask-queuing/queue-microtask-exceptions.any.worker.html`
- `/webmessaging/message-channels/worker-post-after-close.any.worker.html`
- `/webmessaging/message-channels/worker.any.worker.html`
- `/websockets/Create-on-worker-shutdown.any.worker.html`
- The following tests apparently hang because a promise rejection is
never handled, which will kill the process in the main thread but not
in workers (denoland#12221).
- `/streams/readable-streams/async-iterator.any.worker.html`
- `/workers/interfaces/WorkerUtils/importScripts/report-error-setTimeout-cross-origin.sub.any.worker.html`
- `/workers/interfaces/WorkerUtils/importScripts/report-error-setTimeout-redirect-to-cross-origin.sub.any.worker.html`
- `/workers/interfaces/WorkerUtils/importScripts/report-error-setTimeout-same-origin.sub.any.worker.html`
This commit implements classic workers, but only when the `--enable-testing-features-do-not-use` flag is provided. This change is not user facing. Classic workers are used extensively in WPT tests. The classic workers do not support loading from disk, and do not support TypeScript.
Co-authored-by: Luca Casonato <hello@lcas.dev>
Currently, a WPT test is considered failed if its status code is
anything other than 0, regardless of whether the test suite completed
running or not, and any subtests that haven't finished running are not
considered to be failures.
But a test can exit with a zero status code before it has completed
running, if the event loop has run out of tasks because of a bug in one
of the ops, leading to false positives. This change fixes that.
These reports can be consumed by tools like `wptreport` or
https://wpt.fyi. The old style report could be removed in a future PR
when wpt.deno.land is updated.
