Bug 225421 – [ macOS ] imported/w3c/web-platform-tests/webaudio/the-audio-api/the-convolvernode-interface/active-processing.https.html is a flaky text failure

• Component: New Bugs
• Status: NEW

[Robert Jenner]

imported/w3c/web-platform-tests/webaudio/the-audio-api/the-convolvernode-interface/active-processing.https.html

is a flakey text failure on macOS Catalina and higher.

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fwebaudio%2Fthe-audio-api%2Fthe-convolvernode-interface%2Factive-processing.https.html&platform=mac

TEXT DIFF:
 PASS < [initialize] All assertions passed. (total 1 assertions)
 PASS > [test]
 PASS   Test 0: Number of convolver output channels is equal to 2.
-FAIL X Number of distinct values is not equal to 2. Got 1. assert_true: expected true got false
-FAIL < [test] 1 out of 2 assertions were failed. assert_true: expected true got false
+FAIL X Test 1: Number of convolver output channels is not equal to 1. Got 0. assert_true: expected true got false
+PASS   Number of distinct values is equal to 2.
+FAIL < [test] 1 out of 3 assertions were failed. assert_true: expected true got false
 FAIL # AUDIT TASK RUNNER FINISHED: 1 out of 2 tasks were failed. assert_true: expected true got false

[Radar WebKit Bug Importer]

<rdar://problem/77581874>

[Robert Jenner]

Was able to reproduce the failure at BigSur Release ToT using the following test:

run-webkit-tests imported/w3c/web-platform-tests/webaudio/the-audio-api/the-convolvernode-interface/active-processing.https.html --iterations 100 -f

This test appears to have been flaky for a long time. I was able to reproduce the failures over 8,000 revisions back. 

Updated test expectations to Pass Failure here:
https://trac.webkit.org/changeset/277054/webkit