AX: VO+Space does not trigger click on web textfields or selects. Should be same as mouse behavior. Use test case in https://bugs.webkit.org/show_bug.cgi?id=9069
Test case here: https://bug-9069-attachments.webkit.org/attachment.cgi?id=8489
AXTextfield does expose AXPress in the AXActions list, so either VO isn’t sending AXPress, or WebKit isn’t firing the click.
<rdar://problem/19220662>
Also in this APG example: https://www.w3.org/WAI/ARIA/apg/patterns/combobox/examples/combobox-select-only/