[Webkit-unassigned] [Bug 176122] New: Layout Test media/video-controls-drop-and-restore-timeline.html is flaky.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=176122

            Bug ID: 176122
           Summary: Layout Test
                    media/video-controls-drop-and-restore-timeline.html is
                    flaky.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jlewis3 at apple.com
                CC: graouts at apple.com, ryanhaddad at apple.com

media/video-controls-drop-and-restore-timeline.html is a flaky failure according to the flakiness dashboard.
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=media%2Fvideo-controls-drop-and-restore-timeline.html

The test has in the past failed with multiple media tests, but has since also started to fail on its own. The multiple failures are seen in bug:
https://bugs.webkit.org/show_bug.cgi?id=173978

The test will intermittently fail on all macOS WK2 testers.

current build:

https://build.webkit.org/results/Apple%20Sierra%20Release%20WK2%20(Tests)/r221386%20(3951)/results.html
https://build.webkit.org/builders/Apple%20Sierra%20Release%20WK2%20(Tests)/builds/3951

Diff:

--- /Volumes/Data/slave/sierra-release-tests-wk2/build/layout-test-results/media/video-controls-drop-and-restore-timeline-expected.txt
+++ /Volumes/Data/slave/sierra-release-tests-wk2/build/layout-test-results/media/video-controls-drop-and-restore-timeline-actual.txt
@@ -4,14 +4,14 @@
 EXPECTED (video.controls != 'null') OK
 EVENT(canplaythrough)
 EXPECTED (shadowRoot = internals.shadowRoot(video) != 'null') OK
-EXPECTED (timelineContainer = mediaControlsElement(shadowRoot.firstChild, "-webkit-media-controls-timeline-container") != 'null') OK
+EXPECTED (timelineContainer = mediaControlsElement(shadowRoot.firstChild, "-webkit-media-controls-timeline-container") != 'null'), OBSERVED 'null' FAIL
 Initital test at width = 200px
 EXPECTED (video.offsetWidth == '200') OK
-EXPECTED (timelineChildrenAreDropped() == 'true') OK
-EXPECTED (timelineChildrenAreNotDisplayed() == 'true') OK
+TypeError: null is not an object (evaluating 'timelineContainer.children')
+TypeError: null is not an object (evaluating 'timelineContainer.children')
 Second test at width = 500px
 EXPECTED (video.offsetWidth == '500') OK
-EXPECTED (timelineChildrenAreDropped() == 'false') OK
-EXPECTED (timelineChildrenAreNotDisplayed() == 'false') OK
+TypeError: null is not an object (evaluating 'timelineContainer.children')
+TypeError: null is not an object (evaluating 'timelineContainer.children')
 END OF TEST

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20170830/73b820a7/attachment.html>