These pages are copied from Chromium accessibility dump tests to validate native and ARIA form role mappings, including Linux ATK behavior used by Orca.
testing/xvfb.py out/Default/content_browsertests \
--gtest_filter='All/DumpAccessibilityTreeTest.AccessibilityAriaForm/*:All/DumpAccessibilityTreeTest.AccessibilityAriaPosinset/*:All/DumpAccessibilityTreeTest.AccessibilityForm/*:All/DumpAccessibilityTreeTest.AccessibilityInputRadio/*' \
--test-launcher-jobs=1
form.html: unnamed native form is not a landmark, named form is a landmark.input-radio.html: radio controls announce correctly with grouping semantics.aria-form.html: named role="form" appears as form landmark.aria-posinset.html: set size and position announcements are stable.