[Webkit-unassigned] [Bug 196300] New: [ iOS Sim WK2 ] Layout Test fast/visual-viewport/ios/min-scale-greater-than-one.html is a flaky failure

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Mar 27 09:28:59 PDT 2019


            Bug ID: 196300
           Summary: [ iOS Sim WK2 ] Layout Test
                    ml is a flaky failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sroberts at apple.com
                CC: lforschler at apple.com

The following layout test is failing on iOS Simulator Release WK2


Probable cause:

Test recently started showing up on the dashboard around r242531 as a flaky failure on iOS Sim Release. Is a very flaky failure on dashboard, when running test locally it fails 10 times in 60 iterations with 1 child process, unsure if it's because I'm running iterations, but I do get the same diff that is on the bots.

I tested with several revisions from when it was made until current, but there appears to be a lot of code changes so I do not get consistent results. 

Reproduced with: 

run-webkit-tests fast/visual-viewport/ios/min-scale-greater-than-one.html --iterations 500 --child-process 1 --ios-simulator --exit-after-n-failures=10 --no-retry

Flakiness Dashboard:



--- /Volumes/Data/slave/ios-simulator-12-release-tests-wk2/build/layout-test-results/fast/visual-viewport/ios/min-scale-greater-than-one-expected.txt
+++ /Volumes/Data/slave/ios-simulator-12-release-tests-wk2/build/layout-test-results/fast/visual-viewport/ios/min-scale-greater-than-one-actual.txt
@@ -2,7 +2,6 @@
 Scrolling to bottom
 PASS window.scrollY is expectedTop
 PASS Math.round(boundingClientRect.top) is expectedTop
-Tap dispatched
 Target clicked
 PASS successfullyParsed is true

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