Bug 181966 – Layout Test media/W3C/audio/events/event_progress.html is flaky

• Component: New Bugs
• Status: RESOLVED FIXED

[Matt Lewis]

The following layout tests are flaky on macOS Debug

media/W3C/audio/events/event_progress.html
media/W3C/video/events/event_order_loadstart_progress.html

Probable cause:

This has been flaky for an extended period of time and the failures extend beyond the flakiness dashboard 

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=media%2FW3C%2Faudio%2Fevents%2Fevent_progress.html

build:
https://build.webkit.org/results/Apple%20High%20Sierra%20Debug%20WK2%20(Tests)/r227351%20(1725)/results.html
https://build.webkit.org/builders/Apple%20High%20Sierra%20Debug%20WK2%20(Tests)/builds/1725

diff:

--- /Volumes/Data/slave/highsierra-debug-tests-wk2/build/layout-test-results/media/W3C/audio/events/event_progress-expected.txt
+++ /Volumes/Data/slave/highsierra-debug-tests-wk2/build/layout-test-results/media/W3C/audio/events/event_progress-actual.txt
@@ -6,6 +6,9 @@
 PASS true is true
 
 TEST COMPLETE
+PASS true is true
+
+TEST COMPLETE
 spec reference
 
 It looks like the tests are intermittently duplicating the pass message.

[Matt Lewis]

Flakiness dashboard for media/W3C/video/events/event_order_loadstart_progress.html

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=media%2FW3C%2Fvideo%2Fevents%2Fevent_order_loadstart_progress.html

[Matt Lewis]

Marked as flaky in https://trac.webkit.org/changeset/227454/webkit

[Radar WebKit Bug Importer]

<rdar://problem/51449034>

[Peng Liu]

*** Bug 175678 has been marked as a duplicate of this bug. ***

[Peng Liu]

*** Bug 177663 has been marked as a duplicate of this bug. ***

[Peng Liu]

Created attachment 380689 [details]
Patch

[Peng Liu]

Created attachment 380697 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 380697 [details]
Patch

Clearing flags on attachment: 380697

Committed r251009: <https://trac.webkit.org/changeset/251009>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Alexey Proskuryakov]

Comment on attachment 380697 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=380697&action=review

> LayoutTests/ChangeLog:16
> +        * http/tests/resources/js-test-pre.js:
> +        (isSuccessfullyParsed):

I don't see any changes to this file in this patch.

> LayoutTests/ChangeLog:25
> +        * platform/ios/TestExpectations:
> +        * platform/mac/TestExpectations:

I related some more bugs about tests unmarked here.

> LayoutTests/media/W3C/audio/events/event_order_loadstart_progress.html:20
> +var firstProgressEvent = true;

I think that you can just use {once: true} here and elsewhere in this change.

> LayoutTests/media/W3C/audio/events/event_order_loadstart_progress.html:22
> +  if (!firstProgressEvent) return;

WebKit coding style would be to have "return;" on its own line. But perhaps you are matching coding style of this test suite? I don't see existing examples in this diff.

[Peng Liu]

Comment on attachment 380697 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=380697&action=review

>> LayoutTests/ChangeLog:16
>> +        (isSuccessfullyParsed):
> 
> I don't see any changes to this file in this patch.

Ah, forgot to review the list of changes after revising the patch.

>> LayoutTests/media/W3C/audio/events/event_order_loadstart_progress.html:20
>> +var firstProgressEvent = true;
> 
> I think that you can just use {once: true} here and elsewhere in this change.

Right!

>> LayoutTests/media/W3C/audio/events/event_order_loadstart_progress.html:22
>> +  if (!firstProgressEvent) return;
> 
> WebKit coding style would be to have "return;" on its own line. But perhaps you are matching coding style of this test suite? I don't see existing examples in this diff.

Right, it needs to be fixed. If we use the "once" option on addEventListner, then this line needs to be removed.

[Peng Liu]

Reopening to attach new patch.

[Peng Liu]

Created attachment 380779 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 380779 [details]
Patch

Clearing flags on attachment: 380779

Committed r251030: <https://trac.webkit.org/changeset/251030>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Peng Liu]

*** Bug 196637 has been marked as a duplicate of this bug. ***

[Peng Liu]

*** Bug 184614 has been marked as a duplicate of this bug. ***