Bug: Perma a11y-checks TEST-UNEXPECTED-FAIL | browser/components/sidebar/tests/browser/browser_vertical_tabs.js | Node is not accessible via accessibility API: id: , tagName: html:slot, className:  -
Status: RESOLVED
Priority: P5
Resolution: FIXED
Created: 2024-09-26 05:54:49+00:00
Resolved: 2024-09-30 06:08:12+00:00

**Filed by:** imoraru [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=475852630&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/KNrW0Yr5RjCliv1ka1iF1w/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2024-09-26T04:41:55.022Z] 04:41:55     INFO - TEST-PASS | browser/components/sidebar/tests/browser/browser_vertical_tabs.js | Container should extend far beyond the last tab. - 825.75 > 500 - 
[task 2024-09-26T04:41:55.023Z] 04:41:55     INFO - Buffered messages finished
[task 2024-09-26T04:41:55.023Z] 04:41:55     INFO - TEST-UNEXPECTED-FAIL | browser/components/sidebar/tests/browser/browser_vertical_tabs.js | Node is not accessible via accessibility API: id: , tagName: html:slot, className:  - 
[task 2024-09-26T04:41:55.023Z] 04:41:55     INFO - Stack trace:
[task 2024-09-26T04:41:55.023Z] 04:41:55     INFO - chrome://mochikit/content/browser-test.js:test_ok:1597
[task 2024-09-26T04:41:55.023Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/AccessibilityUtils.js:a11yFail:755
[task 2024-09-26T04:41:55.023Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/AccessibilityUtils.js:assertCanBeClicked:1164
[task 2024-09-26T04:41:55.023Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/AccessibilityUtils.js:runIfA11YChecks/this.AccessibilityUtils:1140
[task 2024-09-26T04:41:55.024Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/AccessibilityUtils.js:handleEvent:1257
[task 2024-09-26T04:41:55.024Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/EventUtils.js:synthesizeMouseAtPoint:819
[task 2024-09-26T04:41:55.024Z] 04:41:55     INFO - chrome://mochitests/content/browser/browser/components/sidebar/tests/browser/browser_vertical_tabs.js:test_toggle_vertical_tabs:138
[task 2024-09-26T04:41:55.024Z] 04:41:55     INFO - chrome://mochikit/content/browser-test.js:handleTask:1145
[task 2024-09-26T04:41:55.024Z] 04:41:55     INFO - chrome://mochikit/content/browser-test.js:_runTaskBasedTest:1217
[task 2024-09-26T04:41:55.024Z] 04:41:55     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1358
[task 2024-09-26T04:41:55.024Z] 04:41:55     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:1134
[task 2024-09-26T04:41:55.024Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/<:1058
[task 2024-09-26T04:41:55.024Z] 04:41:55     INFO - Not taking screenshot here: see the one that was previously logged
[task 2024-09-26T04:41:55.025Z] 04:41:55     INFO - TEST-UNEXPECTED-FAIL | browser/components/sidebar/tests/browser/browser_vertical_tabs.js | Node is not accessible via accessibility API: id: , tagName: html:slot, className:  - 
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - Stack trace:
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/browser-test.js:test_ok:1597
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/AccessibilityUtils.js:a11yFail:755
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/AccessibilityUtils.js:assertCanBeClicked:1164
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/AccessibilityUtils.js:runIfA11YChecks/this.AccessibilityUtils:1140
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/AccessibilityUtils.js:handleEvent:1257
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/EventUtils.js:synthesizeMouseAtPoint:819
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochitests/content/browser/browser/components/sidebar/tests/browser/browser_vertical_tabs.js:test_toggle_vertical_tabs:143
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/browser-test.js:handleTask:1145
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/browser-test.js:_runTaskBasedTest:1217
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1358
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:1134
[task 2024-09-26T04:41:55.026Z] 04:41:55     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/<:1058
[task 2024-09-26T04:41:55.028Z] 04:41:55     INFO - TEST-PASS | browser/components/sidebar/tests/browser/browser_vertical_tabs.js | Tabstrip now has three tabs - 
```