S.No Test Scenario
1 ComboBox Demo
  1. Press Left/Right arrow key until ComboBox icon has focus. Press 'Space' to choose.
  2. Tab until the "ComboBox Demo" tab has focus. Press 'space'. Press 'tab'.
  3. Use Tab and Shift-Tab to move between the four ComboBox widgets.
  4. Use the space and down arrow keys to bring up the drop-down list.
  5. Use the up and down arrows to navigate up and down the list.
  6. Use the 'space' key to make the selection.
  7. Repeat 4,5 but hit Esc key to cancel the drop-down.
Expected Result
  1. Verify that space and down arrow bring up the drop-down list.
  2. Verify that up and down arrows move up and down the list.
  3. Verify that 'space' makes the selection (the drop-down list should collapse).