Bug 293642 – REGRESSION(295342@main): [iOS] imported/w3c/web-platform-tests/css/cssom/stylesheet-same-origin.sub.html is constant failure (flaky failure in EWS)

• Status: RESOLVED
• Resolution: FIXED
• Component: New Bugs

[Marta Darbinyan]

The following test is constantly failing on iOS on main and also appear as flaky test in EWS. Suspecting this failure started from 295342@main. 
imported/w3c/web-platform-tests/css/cssom/stylesheet-same-origin.sub.html 

 FAIL Origin-clean check in cross-origin CSSOM Stylesheets assert_throws_dom: stylesheet.cssRules should throw SecurityError. function "function () {
                     sheet.cssRules;
                 }" threw object "TypeError: null is not an object (evaluating 'sheet.cssRules')" that is not a DOMException SecurityError: property "code" is equal to undefined, expected 18
-FAIL Origin-clean check in cross-origin CSSOM Stylesheets (redirect from same-origin to cross-origin) assert_throws_dom: stylesheet.cssRules should throw SecurityError. function "function () {
-                    sheet.cssRules;
-                }" did not throw
+PASS Origin-clean check in cross-origin CSSOM Stylesheets (redirect from same-origin to cross-origin)
 FAIL Origin-clean check in cross-origin CSSOM Stylesheets (redirect from cross-origin to same-origin) assert_throws_dom: stylesheet.cssRules should throw SecurityError. function "function () {
                     sheet.cssRules;
                 }" threw object "TypeError: null is not an object (evaluating 'sheet.cssRules')" that is not a DOMException SecurityError: property "code" is equal to undefined, expected 18
-FAIL Origin-clean check in loading error CSSOM Stylesheets assert_throws_dom: stylesheet.cssRules should throw SecurityError. function "function () {
-                    sheet.cssRules;
-                }" did not throw
+PASS Origin-clean check in loading error CSSOM Stylesheets
 PASS Origin-clean check in same-origin CSSOM Stylesheets
-FAIL Origin-clean check in data:css CSSOM Stylesheets Not allowed to access cross-origin stylesheet
+PASS Origin-clean check in data:css CSSOM Stylesheets

Test history:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcssom%2Fstylesheet-same-origin.sub.html


Test result:
https://ews-build.webkit.org/#/builders/133/builds/19194

[Radar WebKit Bug Importer]

<rdar://problem/152111622>

[EWS]

Test gardening commit 295472@main (6806868e1c8d): <https://commits.webkit.org/295472@main>

Reviewed commits have been landed. Closing PR #45967 and removing active labels.

[Kiet Ho]

Pull request: https://github.com/WebKit/WebKit/pull/46009

[EWS]

Committed 295793@main (46083abd0d17): <https://commits.webkit.org/295793@main>

Reviewed commits have been landed. Closing PR #46009 and removing active labels.