Bug 280234 – [macOS iOS ] imported/w3c/web-platform-tests/html/dom/idlharness.https.html?exclude=(Document|Window|HTML.*) is a flaky timeout failure (EWS failure)

• Component: New Bugs
• Status: NEW

[Marta Darbinyan]

The following test is a flaky failure timeout on macOS and iOS Debug on main and appear as a false positive in Sonoma EWS queue. The test has ben flaky 

imported/w3c/web-platform-tests/html/dom/idlharness.https.html?exclude=(Document|Window|HTML.*)


Diff:
 PASS MediaError interface: constant MEDIA_ERR_SRC_NOT_SUPPORTED on interface prototype object
 PASS MediaError interface: attribute code
 PASS MediaError interface: attribute message
-PASS MediaError must be primary interface of errorVideo.error
-PASS Stringification of errorVideo.error
-PASS MediaError interface: errorVideo.error must inherit property "MEDIA_ERR_ABORTED" with the proper type
-PASS MediaError interface: errorVideo.error must inherit property "MEDIA_ERR_NETWORK" with the proper type
-PASS MediaError interface: errorVideo.error must inherit property "MEDIA_ERR_DECODE" with the proper type
-PASS MediaError interface: errorVideo.error must inherit property "MEDIA_ERR_SRC_NOT_SUPPORTED" with the proper type
-PASS MediaError interface: errorVideo.error must inherit property "code" with the proper type
-PASS MediaError interface: errorVideo.error must inherit property "message" with the proper type
+FAIL Stringification of errorVideo.error assert_class_string: class string of errorVideo.error expected "[object MediaError]" but got "[object Null]"
+FAIL MediaError interface: errorVideo.error must inherit property "MEDIA_ERR_ABORTED" with the proper type assert_inherits: provided value is not an object
+FAIL MediaError interface: errorVideo.error must inherit property "MEDIA_ERR_NETWORK" with the proper type assert_inherits: provided value is not an object
+FAIL MediaError interface: errorVideo.error must inherit property "MEDIA_ERR_DECODE" with the proper type assert_inherits: provided value is not an object
+FAIL MediaError interface: errorVideo.error must inherit property "MEDIA_ERR_SRC_NOT_SUPPORTED" with the proper type assert_inherits: provided value is not an object
+FAIL MediaError interface: errorVideo.error must inherit property "code" with the proper type assert_inherits: provided value is not an object
+FAIL MediaError interface: errorVideo.error must inherit property "message" with the proper type assert_inherits: provided value is not an object
 PASS AudioTrackList interface: existence and properties of interface object
 PASS AudioTrackList interface object length
 PASS AudioTrackList interface object name

Test results: https://build.webkit.org/results/Apple-Sonoma-Debug-WK2-Tests/284084@main%20(2443)/results.html

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fdom%2Fidlharness.https.html%3Fexclude%3D(Document%7CWindow%7CHTML.*)&style=debug

[Radar WebKit Bug Importer]

<rdar://problem/136538640>