1932798 - [wpt-sync] Sync PR 49325 - Enable ShadowRealm testing for ErrorEvent

Status: NEW

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

Description

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

Sync web-platform-tests PR 49325 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/49325
Details from upstream follow.

Philip Chimento <[e-mail]> wrote:

Enable ShadowRealm testing for ErrorEvent

Adapt the tests for the onerror event on Worker global scopes to cover ShadowRealm global scopes as well.

One of the tests uses setTimeout() directly to fire the global onerror event. Use queueMicrotask() instead, since that is [Exposed=*]. We cannot use t.step_timeout() because that wraps the callback in a t.step_func() which catches the error and fails the test.