------------------------------------------------------------------------------
-- Copyright (c) 2015-2016, Natacha Porté --
-- --
-- Permission to use, copy, modify, and distribute this software for any --
-- purpose with or without fee is hereby granted, provided that the above --
-- copyright notice and this permission notice appear in all copies. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. --
------------------------------------------------------------------------------
with Ada.Streams;
with Ada.Strings.Unbounded;
with Natools.Smaz_256;
with Natools.Smaz_Original;
package body Natools.Smaz_Tests is
function Image (S : Ada.Streams.Stream_Element_Array) return String;
procedure Roundtrip_Test
(Test : in out NT.Test;
Dict : in Smaz_256.Dictionary;
Decompressed : in String;
Compressed : in Ada.Streams.Stream_Element_Array);
------------------------------
-- Local Helper Subprograms --
------------------------------
function Image (S : Ada.Streams.Stream_Element_Array) return String is
use Ada.Strings.Unbounded;
Result : Unbounded_String;
begin
for I in S'Range loop
Append (Result, Ada.Streams.Stream_Element'Image (S (I)));
end loop;
return To_String (Result);
end Image;
procedure Roundtrip_Test
(Test : in out NT.Test;
Dict : in Smaz_256.Dictionary;
Decompressed : in String;
Compressed : in Ada.Streams.Stream_Element_Array)
is
use type Ada.Streams.Stream_Element_Array;
use type Ada.Streams.Stream_Element_Offset;
begin
declare
First_OK : Boolean := False;
begin
declare
Buffer : constant Ada.Streams.Stream_Element_Array
:= Smaz_256.Compress (Dict, Decompressed);
begin
First_OK := True;
if Buffer /= Compressed then
Test.Fail ("Bad compression of """ & Decompressed & '"');
Test.Info ("Found: " & Image (Buffer));
Test.Info ("Expected:" & Image (Compressed));
declare
Round : constant String
:= Smaz_256.Decompress (Dict, Buffer);
begin
if Round /= Decompressed then
Test.Info ("Roundtrip failed, got: """ & Round & '"');
else
Test.Info ("Roundtrip OK");
end if;
end;
end if;
end;
exception
when Error : others =>
if not First_OK then
Test.Info ("During compression of """ & Decompressed & '"');
end if;
Test.Report_Exception (Error, NT.Fail);
end;
declare
First_OK : Boolean := False;
begin
declare
Buffer : constant String
:= Smaz_256.Decompress (Dict, Compressed);
begin
First_OK := True;
if Buffer /= Decompressed then
Test.Fail ("Bad decompression of " & Image (Compressed));
Test.Info ("Found: """ & Buffer & '"');
Test.Info ("Expected:""" & Decompressed & '"');
declare
Round : constant Ada.Streams.Stream_Element_Array
:= Smaz_256.Compress (Dict, Buffer);
begin
if Round /= Compressed then
Test.Info ("Roundtrip failed, got: " & Image (Round));
else
Test.Info ("Roundtrip OK");
end if;
end;
end if;
end;
exception
when Error : others =>
if not First_OK then
Test.Info ("During compression of " & Image (Compressed));
end if;
Test.Report_Exception (Error, NT.Fail);
end;
end Roundtrip_Test;
-------------------------
-- Complete Test Suite --
-------------------------
procedure All_Tests (Report : in out NT.Reporter'Class) is
begin
Sample_Strings (Report);
end All_Tests;
----------------------
-- Individual Tests --
----------------------
procedure Sample_Strings (Report : in out NT.Reporter'Class) is
Test : NT.Test := Report.Item ("Roundtrip on sample strings");
begin
Roundtrip_Test (Test, Smaz_Original.Dictionary,
"This is a small string",
(254, 84, 76, 56, 172, 62, 173, 152, 62, 195, 70));
Roundtrip_Test (Test, Smaz_Original.Dictionary,
"foobar",
(220, 6, 90, 79));
Roundtrip_Test (Test, Smaz_Original.Dictionary,
"the end",
(1, 171, 61));
Roundtrip_Test (Test, Smaz_Original.Dictionary,
"not-a-g00d-Exampl333",
(132, 204, 4, 204, 59, 255, 12, 48, 48, 100, 45, 69, 120, 97, 109,
112, 108, 51, 51, 51));
Roundtrip_Test (Test, Smaz_Original.Dictionary,
"Smaz is a simple compression library",
(254, 83, 173, 219, 56, 172, 62, 226, 60, 87, 161, 45, 60, 33, 166,
107, 205, 8, 90, 130, 12, 83));
Roundtrip_Test (Test, Smaz_Original.Dictionary,
"Nothing is more difficult, and therefore more precious, "
& "than to be able to decide",
(254, 78, 223, 102, 99, 116, 45, 42, 11, 129, 44, 44, 131, 38, 22, 3,
148, 63, 210, 68, 11, 45, 42, 11, 60, 33, 28, 144, 164, 36, 203,
143, 96, 92, 25, 90, 87, 82, 165, 215, 237, 2));
Roundtrip_Test (Test, Smaz_Original.Dictionary,
"this is an example of what works very well with smaz",
(155, 56, 172, 41, 2, 250, 4, 45, 60, 87, 32, 159, 135, 65, 42, 254,
107, 23, 231, 71, 145, 152, 243, 227, 10, 173, 219));
Roundtrip_Test (Test, Smaz_Original.Dictionary,
"1000 numbers 2000 will 10 20 30 compress very little",
(255, 3, 49, 48, 48, 48, 236, 38, 45, 92, 221, 0, 255, 3, 50, 48, 48,
48, 243, 152, 0, 255, 7, 49, 48, 32, 50, 48, 32, 51,
48, 161, 45, 60, 33, 166, 0, 231, 71, 151, 3, 3, 87));
Roundtrip_Test (Test, Smaz_Original.Dictionary,
": : : :",
(255, 6, 58, 32, 58, 32, 58, 32, 58));
exception
when Error : others => Test.Report_Exception (Error);
end Sample_Strings;
end Natools.Smaz_Tests;