Test popovers with screen readers to ensure proper announcements.
Expected sequence:
- Trigger focused: "Settings, button"
- Enter pressed: Popover opens
- Content announced: "Settings, dialog, Settings options"
- Focus moves to first focusable element
- Escape pressed: Popover closes, focus returns to trigger
Form Popover Announcements Expected announcement: "Sign In, button" → "Sign In, dialog, Username, edit text" when popover opens.
Close Button Announcements Expected announcement: "Close, button" when close button is focused, and popover closes when activated.