Bug 208384 – [ Mac wk1 ] imported/w3c/web-platform-tests/requestidlecallback/callback-timeout-when-busy.html is flakey failing.

• Component: Tools / Tests
• Status: NEW

[Jason Lawrence]

imported/w3c/web-platform-tests/requestidlecallback/callback-timeout-when-busy.html

Description:
This test is flaky failing on Mac wk1. It appears to flaky fail throughout the visible history.

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Frequestidlecallback%2Fcallback-timeout-when-busy.html&flavor=wk1&platform=mac&limit=50000

Diff:
--- /Volumes/Data/slave/mojave-debug-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/requestidlecallback/callback-timeout-when-busy-expected.txt
+++ /Volumes/Data/slave/mojave-debug-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/requestidlecallback/callback-timeout-when-busy-actual.txt
@@ -1,6 +1,6 @@
 Test of requestIdleCallback timeout behavior
 
 
-FAIL requestIdleCallback not scheduled when event loop is busy. assert_false: IdleDeadline.didTimeout MUST be false if requestIdleCallback wasn't scheduled due to a timeout expected false got true
+FAIL requestIdleCallback not scheduled when event loop is busy. assert_equals: Busy event loop should be finished by the time we get scheduled expected 0 but got 7
 FAIL requestIdleCallback scheduled with timeout when event loop is busy. assert_true: IdleDeadline.timeRemaining MUST be equal to zero if requestIdleCallback was scheduled due to a timeout expected true got false

[Radar WebKit Bug Importer]

<rdar://problem/59895884>

[Jason Lawrence]

I have marked this test as failing while the issue is investigated.
https://trac.webkit.org/changeset/257646/webkit

[Jason Lawrence]

I can reproduce this issue with  r257738 by running the command below.

run-webkit-tests --iterations 1000 --exit-after-n-failures 4 --force -1 imported/w3c/web-platform-tests/requestidlecallback/callback-timeout-when-busy.html --no-retry

[1/1000] imported/w3c/web-platform-tests/requestidlecallback/callback-timeout-when-busy.html failed unexpectedly (text diff)
                                                                                 
999 tests ran as expected, 1 didn't: