1863002 - [wpt-sync] Sync PR 42944 - Add tests for async modules not blocking execution of sibling modules

Status: RESOLVED FIXED

(Core :: DOM: Core & HTML, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 42944 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/42944
Details from upstream follow.

Nicolò Ribaudo <[e-mail]> wrote:

Add tests for async modules not blocking execution of sibling modules

Current results:

	Chrome, Node.js, Deno	Firefox	Safari, Bun
Async modules only scheduling microtasks don't block execution of sibling modules	✅	❌	❌
Async modules scheduling tasks don't block execution of sibling modules	✅	✅	❌

This behavior is entirely specified in ECMA-262 (at https://tc39.es/ecma262/#sec-innermoduleevaluation) and the table above makes it look as if the behavior is engine-based.

However, when trying to add this as a test262 test all the engines passed it (see CI at https://github.com/tc39/test262/pull/3955). Only testing it in complete platforms show the failures, hence why the PR in this repo. This is not surprising, given how modules are implemented half in JS engines and half in embedding platforms.

Comment 1

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=ccfc713af8e7494e47cef6e875e1721eb4639e5b

Comment 2

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

CI Results

Ran 9 Firefox configurations based on mozilla-central, and Firefox, Chrome, and Safari on GitHub CI

Total 2 tests and 2 subtests

Status Summary

Firefox

OK : 2
PASS: 2
FAIL: 2

Chrome

OK : 2
PASS: 4

Safari

OK : 2
FAIL: 4

Links

Gecko CI (Treeherder)
GitHub PR Head
GitHub PR Base

Details

New Tests That Don't Pass

• /html/semantics/scripting-1/the-script-element/module/top-level-await/sibling-imports-not-blocked.any.worker.html [wpt.fyi]
  • Async modules only scheduling microtasks don't block execution of sibling modules: FAIL (Chrome: PASS, Safari: FAIL)
• /html/semantics/scripting-1/the-script-element/module/top-level-await/sibling-imports-not-blocked.any.html [wpt.fyi]
  • Async modules only scheduling microtasks don't block execution of sibling modules: FAIL (Chrome: PASS, Safari: FAIL)

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/fd637ca97d4a
[wpt PR 42944] - Add tests for async modules not blocking execution of sibling modules, a=testonly
https://hg.mozilla.org/integration/autoland/rev/ef1ce90688a4
[wpt PR 42944] - Update wpt metadata, a=testonly

Comment 4

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/fd637ca97d4a
https://hg.mozilla.org/mozilla-central/rev/ef1ce90688a4