ARIA 1.0 Test Case 763
    
    
      Option 1
 
      Option 2
 
      Option 3
     
    
    Description
      A div element with the role='listbox' has three child div elements each with 
        role='option' and aria-setsize='3'.   The 1st child div element has aria-posinset='1', 
        the 2nd child div element has aria-posinset='2' and the 3rd child div element 
        has aria-posinset='3'.
      Expected Results
      
      MSAA + UIA Express
      
      - role="tree": ROLE_SYSTEM_LIST
- role="treeitem": ROLE_SYSTEM_LISTITEM
- LegacyIAccessible.Description will be in the form X of Y, 
        where X is the value of aria-posinset and Y is the value of aria-setsize
      
MSAA + IAccessible2
      
        - role="tree": ROLE_SYSTEM_LIST
- role="treeitem": ROLE_SYSTEM_LISTITEM
- The structure should be reflected in the accessibility tree as directed by aria-posinset.
- function groupPosition() should be available and have the following results:
          
            - groupLevel: 1
- similarItemsInGroup: 3
- positionInGroup: aria-posinest value
 
UIA
      
        - role="tree": List
- role="treeitem": ListItem
- LegacyIAccessible.Description will be in the form X of Y, 
          where X is the value of aria-posinset and Y is the value of aria-setsize
ATK/AT-SPI
      
        - role="tree": ROLE_LIST
- role="treeitem": ROLE_LISTITEM
- aria-setsize: not mapped to setsize: value
- aria-posinset: is mapped to  posinset: value
AXAPI
      
        - role="tree": AXList = 'list'
- role="treeitem": AXGroup = 'group'
- aria-setsize: is mapped to AXARIASetSize: value
- aria-posinset: is mapped to AXARIAPosInSet: value