Bug 215515

Summary:	[ macOS iOS ] imported/w3c/web-platform-tests/user-timing/measure_navigation_timing.html is a flaky failure
Product:	WebKit	Reporter:	Hector Lopez <hector_i_lopez>
Component:	New Bugs	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Hector Lopez 2020-08-14 10:46:54 PDT

imported/w3c/web-platform-tests/user-timing/measure_navigation_timing.html

Test is a flaky failure for macOS and iOS according to history. First occurrence of failure on iOS is at r259150 and on macOS at r252370.

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fuser-timing%2Fmeasure_navigation_timing.html&platform=ios&platform=mac&limit=50000

Diff:
--- /Volumes/Data/slave/ios-simulator-13-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/user-timing/measure_navigation_timing-expected.txt
+++ /Volumes/Data/slave/ios-simulator-13-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/user-timing/measure_navigation_timing-actual.txt
@@ -12,7 +12,7 @@
 PASS window.performance.getEntriesByName("measure_nav_start_no_end")[0].name == "measure_nav_start_no_end" 
 PASS window.performance.getEntriesByName("measure_nav_start_no_end")[0].startTime is correct 
 PASS window.performance.getEntriesByName("measure_nav_start_no_end")[0].entryType == "measure" 
-PASS window.performance.getEntriesByName("measure_nav_start_no_end")[0].duration is approximately correct (up to 20ms difference allowed) 
+FAIL window.performance.getEntriesByName("measure_nav_start_no_end")[0].duration is approximately correct (up to 20ms difference allowed) assert_true: window.performance.getEntriesByName("measure_nav_start_no_end")[0].duration is approximately correct (up to 20ms difference allowed) expected true got false
 PASS window.performance.getEntriesByName("measure_nav_start_mark_end")[0].name == "measure_nav_start_mark_end" 
 PASS window.performance.getEntriesByName("measure_nav_start_mark_end")[0].startTime is correct 
 PASS window.performance.getEntriesByName("measure_nav_start_mark_end")[0].entryType == "measure"

Comment 1 Radar WebKit Bug Importer 2020-08-14 10:47:12 PDT

<rdar://problem/67082688>

Comment 2 Hector Lopez 2020-08-14 11:29:36 PDT

Test expectation while investigated:

https://trac.webkit.org/changeset/265680/webkit