chromium/content/test/data/accessibility/html/details-expected-mac.txt

AXWebArea AXRoleDescription='HTML content'
++AXGroup AXRoleDescription='details'
++++AXButton AXExpanded=0 AXRoleDescription='disclosure triangle' AXTitle='details tag'
++++++AXStaticText AXRoleDescription='text' AXValue='details tag'
++AXGroup AXRoleDescription='details'
++++AXButton AXExpanded=1 AXRoleDescription='disclosure triangle' AXTitle='details tag open'
++++++AXStaticText AXRoleDescription='text' AXValue='details tag open'
++++AXGroup AXRoleDescription='group'
++++++AXStaticText AXRoleDescription='text' AXValue='The details tag with open specifies that the details should be visible (open) to the user.'