-- CXA4001.A
--
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- OBJECTIVE:
--      Check that the types, operations, and other entities defined within
--      the package Ada.Strings.Maps are available and/or produce correct
--      results.
--
-- TEST DESCRIPTION:
--      This test demonstrates the availability and function of the types and
--      operations defined in package Ada.Strings.Maps.  It demonstrates the
--      use of these types and functions as they would be used in common
--      programming practice.
--      Character set creation, assignment, and comparison are evaluated
--      in this test.  Each of the functions provided in package
--      Ada.Strings.Maps is utilized in creating or manipulating set objects,
--      and the function results are evaluated for correctness.
--      Character sequences are examined using the functions provided for 
--      manipulating objects of this type.  Likewise, character maps are
--      created, and their contents evaluated.  Exception raising conditions
--      from the function To_Mapping are also created.
--      Note: Throughout this test, the set logical operators are printed in
--      capital letters to enhance their visibility.
--      
--       
-- CHANGE HISTORY:
--      06 Dec 94   SAIC    ACVC 2.0
--
--!

with Ada.Strings.Maps;
with Report;

procedure CXA4001 is

   use Ada.Strings;
   use type Maps.Character_Set;
  
begin

   Report.Test ("CXA4001", "Check that the types, operations, and other "   &
                           "entities defined within the package "           &
                           "Ada.Strings.Maps are available and/or produce " &
                           "correct results");

   Test_Block:
   declare

      MidPoint_Letter  : constant := 13;
      Last_Letter      : constant := 26;

      Vowels           : constant Maps.Character_Sequence := "aeiou";
      Quasi_Vowel      : constant Character := 'y';

      Alphabet         :  Maps.Character_Sequence (1..Last_Letter);
      Half_Alphabet    :  Maps.Character_Sequence (1..MidPoint_Letter);
      Inverse_Alphabet :  Maps.Character_Sequence (1..Last_Letter);

      Alphabet_Set,
      Consonant_Set,
      Vowel_Set,
      Full_Vowel_Set,
      First_Half_Set,
      Second_Half_Set  : Maps.Character_Set;

   begin

      -- Load the alphabet string for use in creating sets.


      for i in 0..12 loop
         Half_Alphabet(i+1) := Character'Val(Character'Pos('a') + i);
      end loop;

      for i in 0..25 loop
         Alphabet(i+1) := Character'Val(Character'Pos('a') + i);
      end loop;


      -- Initialize a series of Character_Set objects.
      
      Alphabet_Set    := Maps.To_Set(Alphabet);
      Vowel_Set       := Maps.To_Set(Vowels);
      Full_Vowel_Set  := Vowel_Set   OR  Maps.To_Set(Quasi_Vowel);
      Consonant_Set   := Vowel_Set  XOR  Alphabet_Set;

      First_Half_Set  := Maps.To_Set(Half_Alphabet);
      Second_Half_Set := Alphabet_Set  XOR  First_Half_Set;


      -- Evaluation of Set objects, operators, and functions.

      if Alphabet_Set /= (Vowel_Set OR Consonant_Set) then
         Report.Failed("Incorrect set combinations using OR operator");
      end if;


      for i in 1..5 loop
         if not Maps.Is_In(Vowels(i), Vowel_Set)    or
            not Maps.Is_In(Vowels(i), Alphabet_Set) or
            Maps.Is_In(Vowels(i), Consonant_Set) 
         then
            Report.Failed("Incorrect function Is_In use with set " &
                          "combinations - " & Integer'Image(i));
         end if;
      end loop;


      if Maps.Is_Subset(Vowel_Set, First_Half_Set)    or
         Maps."<="(Vowel_Set, Second_Half_Set)        or
         not Maps.Is_Subset(Vowel_Set, Alphabet_Set)
      then
         Report.Failed("Incorrect set evaluation using Is_Subset function");
      end if;

     
      if not (Full_Vowel_Set = Maps.To_Set("aeiouy")) then
         Report.Failed("Incorrect result for ""="" set operator");
      end if;


      if not ((Vowel_Set AND First_Half_Set) OR 
              (Full_Vowel_Set AND Second_Half_Set)) = Full_Vowel_Set then
         Report.Failed
           ("Incorrect result for AND, OR, or ""="" set operators");
      end if;


      if (Alphabet_Set AND Maps.Null_Set) /= Maps.Null_Set  or
         (Alphabet_Set OR  Maps.Null_Set) /= Alphabet_Set
      then
         Report.Failed("Incorrect result for AND or OR set operators");
      end if;


      Vowel_Set := Full_Vowel_Set;
      Vowel_Set := Vowel_Set AND (NOT Maps.To_Set(Quasi_Vowel));
      
      if not (Vowels = Maps.To_Sequence(Vowel_Set)) then
         Report.Failed("Incorrect Set to Sequence translation");
      end if;

      
      for i in 1..26 loop
         Inverse_Alphabet(i) := Alphabet(27-i);
      end loop;

      declare
         Inverse_Map : Maps.Character_Mapping :=
                         Maps.To_Mapping(Alphabet, Inverse_Alphabet);
      begin
         if Maps.Value(Maps.Identity, 'b') /= Maps.Value(Inverse_Map,'y') 
         then
            Report.Failed("Incorrect Inverse mapping");
         end if;
      end;


      -- Check that Translation_Error is raised when a character is
      -- repeated in the parameter "From" string.
      declare
         Bad_Map : Maps.Character_Mapping;
      begin
         Bad_Map := Maps.To_Mapping(From => "aa", To => "yz");
         Report.Failed("Exception not raised with repeated character");
      exception
         when Translation_Error => null;  -- OK
         when others            => 
            Report.Failed("Incorrect exception raised in To_Mapping with " &
                          "a repeated character");
      end;


      -- Check that Translation_Error is raised when the parameters of the
      -- function To_Mapping are of unequal lengths.
      declare
         Bad_Map : Maps.Character_Mapping;
      begin
         Bad_Map := Maps.To_Mapping("abc", "yz");
         Report.Failed("Exception not raised with unequal parameter lengths");
      exception
         when Translation_Error => null;  -- OK
         when others            => 
            Report.Failed("Incorrect exception raised in To_Mapping with " &
                          "unequal parameter lengths");
      end;


   exception
      when others => Report.Failed ("Exception raised in Test_Block");
   end Test_Block;


   Report.Result;

end CXA4001;