Bug 231924 – [ Mac ] inspector/css/modify-css-property.html is a flaky failure

• Status: NEW
• Component: CSS

[Eric Hutchison]

inspector/css/modify-css-property.html

is a flaky failure on Mac.

History: https://results.webkit.org/?suite=layout-tests&test=inspector/css/modify-css-property.html

Build: https://ews-build.webkit.org/#/builders/60/builds/14758

Results: https://ews-build.s3-us-west-2.amazonaws.com/macOS-AppleSilicon-Big-Sur-Debug-WK2-Tests-EWS/r441631-14758/results.html

Diff: 
--- /Volumes/Data/worker/macOS-AppleSilicon-Big-Sur-Debug-WK2-Tests-EWS/build/layout-test-results/inspector/css/modify-css-property-expected.txt
+++ /Volumes/Data/worker/macOS-AppleSilicon-Big-Sur-Debug-WK2-Tests-EWS/build/layout-test-results/inspector/css/modify-css-property-actual.txt
@@ -12,9 +12,7 @@
 PASS: Style declaration text should update immediately.
 
 -- Running test case: ModifyCSSProperty.PropertiesChangedEvent
-PASS: Style declaration is unlocked.
-PASS: "width" property value should update to "200px".
-PASS: Inline style declaration text should update when not locked.
+!! TIMEOUT: took longer than 10000ms
 
 -- Running test case: Update inline style value when CSSStyleDeclaration locked and not locked
 PASS: Style declaration text should update immediately.
@@ -40,4 +38,11 @@
 PASS: Commented out property should be disabled.
 PASS: Style declaration text should update immediately with commented out property.
 PASS: Uncommented property should be enabled.
+PASS: Style declaration is unlocked.
+FAIL: "width" property value should update to "200px".
+    Expected: "200px"
+    Actual: "20px"
+FAIL: Inline style declaration text should update when not locked.
+    Expected: "width: 200px;"
+    Actual: "width: 20px;"
 
Reproduced on ToT (r284399) using run-webkit-tests --iterations 500 --exit-after-n-failures 1 --clobber-old-results inspector/css/modify-css-property.html

[Radar WebKit Bug Importer]

<rdar://problem/84394515>

[Eric Hutchison]

Updated test expectations at https://trac.webkit.org/changeset/284415/webkit