Bug 196298 - [iOS WK2] fast/viewport/ios/use-minimum-device-width-for-page-without-viewport-meta.html is a flaky failure
Summary: [iOS WK2] fast/viewport/ios/use-minimum-device-width-for-page-without-viewpor...
Alias: None
Product: WebKit
Classification: Unclassified
Component: Tools / Tests (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Wenson Hsieh
Keywords: InRadar
Depends on:
Reported: 2019-03-27 08:45 PDT by Shawn Roberts
Modified: 2019-10-25 19:36 PDT (History)
11 users (show)

See Also:

Patch (7.89 KB, patch)
2019-10-25 14:17 PDT, Wenson Hsieh
no flags Details | Formatted Diff | Diff
Fix a ChangeLog typo (7.88 KB, patch)
2019-10-25 14:20 PDT, Wenson Hsieh
no flags Details | Formatted Diff | Diff

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Description Shawn Roberts 2019-03-27 08:45:36 PDT
The following layout test is failing on iOS Simulator Release WK2


Probable cause:

Test has been a flaky failure since the test was added in https://trac.webkit.org/changeset/238946/webkit . Failing around 4 times on average in 500 iterations from r238946 up until r240911

Changes made in https://trac.webkit.org/changeset/240912/webkit made test fail a lot more frequently. During testing found from 240912 up until current r243537 is failing approximately 10 times 60 attempts (setting testing to exit after 10 failures)

Reproduced with : 

run-webkit-tests fast/viewport/ios/use-minimum-device-width-for-page-without-viewport-meta.html --iterations 500 -f --ios-simulator --exit-after-n-failures=10

Flakiness Dashboard:


--- /Volumes/Data/slave/ios-simulator-12-release-tests-wk2/build/layout-test-results/fast/viewport/ios/use-minimum-device-width-for-page-without-viewport-meta-expected.txt
+++ /Volumes/Data/slave/ios-simulator-12-release-tests-wk2/build/layout-test-results/fast/viewport/ios/use-minimum-device-width-for-page-without-viewport-meta-actual.txt
@@ -1,7 +1,7 @@
-window size: [640, 1096]
+window size: [320, 548]
 square size: [64, 110]
-zoom scale: 0.50
+zoom scale: 1.00
 window size: [768, 1315]
Comment 1 Shawn Roberts 2019-03-27 08:46:47 PDT
Adding Yongjun Zhang who created the test.

Adding Simon Fraser who authored the change that made test more flaky.
Comment 2 Radar WebKit Bug Importer 2019-03-27 08:48:38 PDT
Comment 3 Shawn Roberts 2019-03-27 09:45:12 PDT
Marked flaky in https://trac.webkit.org/changeset/243548/webkit
Comment 4 Wenson Hsieh 2019-10-25 14:17:43 PDT Comment hidden (obsolete)
Comment 5 Wenson Hsieh 2019-10-25 14:20:41 PDT
Created attachment 381966 [details]
Fix a ChangeLog typo
Comment 6 WebKit Commit Bot 2019-10-25 19:36:27 PDT
Comment on attachment 381966 [details]
Fix a ChangeLog typo

Clearing flags on attachment: 381966

Committed r251625: <https://trac.webkit.org/changeset/251625>
Comment 7 WebKit Commit Bot 2019-10-25 19:36:29 PDT
All reviewed patches have been landed.  Closing bug.