The Test[TestAction] command tests the result of executing the action specified by action in the context menu generated for the expression expr.

The parameter action, a list of strings, represents the sequence of nested menus that must be followed in the context-sensitive menu in order to select this action.  For example, to simulate the selection of the first element of the list  using context-sensitive menus, enter Test[TestAction](["Select Element", "1"], [1,2,3]).

The result returned by TestAction is a string, which represents the value that is returned to the worksheet if the action action is selected using context-sensitive menus.