------------------------------------------------------------------------------
--                        M A G I C   R U N T I M E                         --
--                                                                          --
--                       Copyright (C) 2020, AdaCore                        --
--                                                                          --
-- This library is free software;  you can redistribute it and/or modify it --
-- under terms of the  GNU General Public License  as published by the Free --
-- Software  Foundation;  either version 3,  or (at your  option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY;  without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE.                            --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
------------------------------------------------------------------------------

with VSS.Characters;
with VSS.Strings;

procedure Test_String_Buffer is

   use type VSS.Strings.Virtual_String;

begin
   --  Few append operations to null string.

   declare
      Buffer : VSS.Strings.Virtual_String;

   begin
      Buffer.Append ('A');
      Buffer.Append ('Б');
      Buffer.Append ('क');
      Buffer.Append ('𐌈');

      if Buffer /= VSS.Strings.To_Virtual_String ("AБक𐌈") then
         raise Program_Error;
      end if;
   end;

   --  Few append operations to small initial string, enough to overlow
   --  "in place" data buffer.

   declare
      Buffer : VSS.Strings.Virtual_String :=
        VSS.Strings.To_Virtual_String ("********");

   begin
      Buffer.Append ('A');
      Buffer.Append ('Б');
      Buffer.Append ('क');
      Buffer.Append ('𐌈');

      if Buffer /= VSS.Strings.To_Virtual_String ("********AБक𐌈") then
         raise Program_Error;
      end if;
   end;
end Test_String_Buffer;