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with Natools.S_Expressions.Parsers;
with Natools.S_Expressions.Test_Tools;

package body Natools.S_Expressions.Printers.Pretty.Tests is

   package Latin_1 renames Ada.Characters.Latin_1;

   procedure Check_Stream
     (Test : in out NT.Test;
      Stream : in Test_Tools.Memory_Stream);
      --  On error in Stream, report error and dump relevant information.

   procedure Parse_Print_Test
     (Test : in out NT.Test;
      Param : in Parameters;
      Expected : in Atom);
      --  Parse Expected and feed it into a new pretty printer, checking
      --  the result is identical to Expected.



   ------------------------------
   -- Local Helper Subprograms --
   ------------------------------

   procedure Check_Stream
     (Test : in out NT.Test;
      Stream : in Test_Tools.Memory_Stream) is
   begin
      if Stream.Has_Mismatch or else Stream.Unread_Expected /= Null_Atom then
         if Stream.Has_Mismatch then
            Test.Fail ("Mismatch at position"
              & Count'Image (Stream.Mismatch_Index));

            declare
               Stream_Data : Atom renames Stream.Get_Data;
            begin
               Test_Tools.Dump_Atom
                 (Test,
                  Stream_Data (Stream_Data'First .. Stream.Mismatch_Index - 1),
                  "Matching data");
               Test_Tools.Dump_Atom
                 (Test,
                  Stream_Data (Stream.Mismatch_Index .. Stream_Data'Last),
                  "Mismatching data");
            end;
         end if;

         if Stream.Unread_Expected /= Null_Atom then
            Test.Fail;
            Test_Tools.Dump_Atom
              (Test,
               Stream.Unread_Expected,
               "Left to expect");
         end if;
      end if;
   end Check_Stream;


   procedure Parse_Print_Test
     (Test : in out NT.Test;
      Param : in Parameters;
      Expected : in Atom) is
   begin
      declare
         Input, Output : aliased Test_Tools.Memory_Stream;
         Parser : aliased Parsers.Parser;
         Subparser : Parsers.Subparser (Parser'Access, Input'Access);
         Pretty_Printer : Printer (Output'Access);
         Event : Events.Event;
      begin
         Input.Set_Data (Expected);
         Output.Set_Expected (Expected);
         Pretty_Printer.Set_Parameters (Param);
         Subparser.Next (Event);
         Transfer (Subparser, Pretty_Printer);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;
   exception
      when Error : others =>
         Test.Report_Exception (Error);
   end Parse_Print_Test;
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            & "    3637#)"));
         Pr.Set_Parameters (Param);

         Pr.Open_List;
         Pr.Append_Atom (To_Atom ("01234567"));
         Pr.Close_List;

         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;

      Param.Fallback := Base64;

      declare
         Output : aliased Test_Tools.Memory_Stream;
         Pr : Printer (Output'Access);
      begin
         Output.Set_Expected (To_Atom ("(" & Latin_1.LF
            & "   |  YWJj" & Latin_1.LF
            & "      REVG" & Latin_1.LF
            & "      Z2hp" & Latin_1.LF
            & "      SktM" & Latin_1.LF
            & "   |)"));
         Pr.Set_Parameters (Param);

         Pr.Open_List;
         Pr.Append_Atom (To_Atom ("abcDEFghiJKL"));
         Pr.Close_List;

         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;
   exception
      when Error : others => Test.Report_Exception (Error);
   end Atom_Width;


   procedure Basic_Printing (Report : in out NT.Reporter'Class) is
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         P.Open_List;
         P.Append_Atom (To_Atom ("subarg"));
         P.Close_List;
         P.Append_Atom (To_Atom ("arg"));
         P.Close_List;
         P.Append_Atom (To_Atom ("end"));

         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;
   exception
      when Error : others => Test.Report_Exception (Error);
   end Basic_Printing;


   procedure Indentation (Report : in out NT.Reporter'Class) is
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         Output.Set_Expected (To_Atom
           ("(begin" & Latin_1.CR
            & " ""quot\" & Latin_1.CR
            & "ed" & Latin_1.CR
            & "\n" & Latin_1.CR
            & "str"")"));
         Print (Pr);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;

      Param.Newline := LF;

      declare
         Output : aliased Test_Tools.Memory_Stream;
         Pr : Printer (Output'Access);
      begin
         Pr.Set_Parameters (Param);
         Output.Set_Expected (To_Atom
           ("(begin" & Latin_1.LF
            & " ""quot\" & Latin_1.LF
            & "ed\r" & Latin_1.LF
            & "\rstr"")"));
         Print (Pr);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;

      Param.Newline := CR_LF;

      declare
         Output : aliased Test_Tools.Memory_Stream;
         Pr : Printer (Output'Access);
      begin
         Pr.Set_Parameters (Param);
         Output.Set_Expected (To_Atom
           ("(begin" & Latin_1.CR & Latin_1.LF
            & " ""quot\" & Latin_1.CR & Latin_1.LF
            & "ed" & Latin_1.CR & Latin_1.LF
            & "\rstr"")"));
         Print (Pr);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;

      Param.Newline := LF_CR;

      declare
         Output : aliased Test_Tools.Memory_Stream;
         Pr : Printer (Output'Access);
      begin
         Pr.Set_Parameters (Param);
         Output.Set_Expected (To_Atom
           ("(begin" & Latin_1.LF & Latin_1.CR
            & " ""quot\" & Latin_1.LF & Latin_1.CR
            & "ed\r" & Latin_1.LF & Latin_1.CR
            & "str"")"));
         Print (Pr);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;
   exception
      when Error : others => Test.Report_Exception (Error);
   end Newline_Formats;


   procedure Parameter_Mutators (Report : in out NT.Reporter'Class) is
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         Output.Set_Expected
           (Encodings.Hex_Atom_Begin
            & Encodings.Encode_Hex
               (Source (Source'First + 1 .. Source'Last), Param.Hex_Casing)
            & Encodings.Hex_Atom_End);
         Pr.Set_Parameters (Param);
         Pr.Append_Atom (Source (Source'First + 1 .. Source'Last));
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;

      declare
         Output : aliased Test_Tools.Memory_Stream;
         Pr : Printer (Output'Access);
      begin
         Output.Set_Expected (To_Atom
           ("""Special: \b\t\n\v\f\r\\\""\x00"
            & "UTF-8 sequences: \xC3\xA9, \xE2\x88\x92, \xF0\x9F\x81\xA1, "
            & "\xF9\x88\xB4\x95\xA7, \xFD\xB6\x95\x83\x88\x90"
            & "Invalid UTF-8 sequences: "
            & "\xAA, \xC3, \xE2\x88, \xF0\x9F\x81, \xF9\x88\xB4\x95, "
            & "\xFD\xB6\x95\x83\x88, \xFE." & Latin_1.CR & Latin_1.LF
            & "<>\r\n"""));
         Pr.Set_Parameters (Param);
         Pr.Append_Atom (Source);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;

      Param.Char_Encoding := Latin;
      Param.Hex_Casing := Encodings.Lower;

      declare
         Output : aliased Test_Tools.Memory_Stream;
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            & Character'Val (16#B4#) & "\x95, "
            & Character'Val (16#FD#) & Character'Val (16#B6#)
            & "\x95\x83\x88, " & Character'Val (16#FE#) & '.'
            & Latin_1.CR & Latin_1.LF
            & "<>\r\n"""));
         Pr.Set_Parameters (Param);
         Pr.Append_Atom (Source);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;

      Param.Char_Encoding := UTF_8;
      Param.Quoted_Escape := Octal_Escape;

      declare
         Output : aliased Test_Tools.Memory_Stream;
         Pr : Printer (Output'Access);
      begin
         Output.Set_Expected (To_Atom ("""Special: \b\t\n\v\f\r\\\""\000")
            & Source (18 .. 62)
            & To_Atom ("Invalid UTF-8 sequences: "
               & "\252, \303, \342\210, \360\237\201, "
               & "\371\210\264\225, \375\266\225\203\210, \376."
               & Latin_1.CR & Latin_1.LF
               & "<>\r\n"""));
         Pr.Set_Parameters (Param);
         Pr.Append_Atom (Source);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;

      Param.Width := 31;

      declare
         Output : aliased Test_Tools.Memory_Stream;
         Pr : Printer (Output'Access);
      begin
         Output.Set_Expected (To_Atom ("""Special: \b\t\n\v\f\r\\\""\000"
                                 & '\' & Latin_1.CR & Latin_1.LF)
            & Source (18 .. 62)
            & To_Atom ('\' & Latin_1.CR & Latin_1.LF
               & "Invalid UTF-8 sequences: \252,\" & Latin_1.CR & Latin_1.LF
               & " \303, \342\210, \360\237\201,\" & Latin_1.CR & Latin_1.LF
               & " \371\210\264\225, \375\266\" & Latin_1.CR & Latin_1.LF
               & "\225\203\210, \376."
               & Latin_1.CR & Latin_1.LF
               & "<>\r\n"""));
         Pr.Set_Parameters (Param);
         Pr.Append_Atom (Source);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;
   exception
      when Error : others => Test.Report_Exception (Error);
   end Quoted_String_Escapes;


   procedure Separators (Report : in out NT.Reporter'Class) is
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      declare
         Output : aliased Test_Tools.Memory_Stream;
         Pr : Printer (Output'Access);
      begin
         Output.Set_Expected (To_Atom ("5:begin(()(4:head4:tail))3:end"));
         Pr.Set_Parameters (Param);
         Test_Exp (Pr);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;

      Param.Space_At := (others => (others => True));

      declare
         Output : aliased Test_Tools.Memory_Stream;
         Pr : Printer (Output'Access);
      begin
         Output.Set_Expected
           (To_Atom ("5:begin ( ( ) ( 4:head 4:tail ) ) 3:end"));
         Pr.Set_Parameters (Param);
         Test_Exp (Pr);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;

      Param.Newline_At := (others => (others => True));
      Param.Newline := LF;

      declare
         Output : aliased Test_Tools.Memory_Stream;
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           & "4:head" & Latin_1.LF
           & "4:tail" & Latin_1.LF
           & ')' & Latin_1.LF
           & ')' & Latin_1.LF
           & "3:end"));
         Pr.Set_Parameters (Param);
         Test_Exp (Pr);
         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;
   exception
      when Error : others => Test.Report_Exception (Error);
   end Separators;


   procedure Token_Separation (Report : in out NT.Reporter'Class) is
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         Pr.Set_Fallback (Base64);
         Pr.Append_Atom (To_Atom ("Base-64" & Latin_1.LF));
         Pr.Append_Atom (Token);
         Pr.Close_List;
         Pr.Append_Atom (To_Atom ("end"));
         Pr.Close_List;

         Check_Stream (Test, Output);
         Output.Check_Stream (Test);
      end;
   exception
      when Error : others => Test.Report_Exception (Error);
   end Token_Separation;

end Natools.S_Expressions.Printers.Pretty.Tests;
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