------------------------------------------------------------------------------
-- 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.Characters.Latin_1;
with Ada.Streams;
with Ada.Strings.Unbounded;
with Natools.S_Expressions;
with Natools.Smaz_256;
with Natools.Smaz_64;
with Natools.Smaz_Generic;
with Natools.Smaz_Original;
with Natools.Smaz_Test_Base_64_Hash;
package body Natools.Smaz_Tests is
generic
with package Smaz is new Natools.Smaz_Generic (<>);
with function Image (S : Ada.Streams.Stream_Element_Array) return String;
procedure Generic_Roundtrip_Test
(Test : in out NT.Test;
Dict : in Smaz.Dictionary;
Decompressed : in String;
Compressed : in Ada.Streams.Stream_Element_Array);
function Decimal_Image (S : Ada.Streams.Stream_Element_Array) return String;
function Direct_Image (S : Ada.Streams.Stream_Element_Array) return String
renames Natools.S_Expressions.To_String;
function To_SEA (S : String) return Ada.Streams.Stream_Element_Array
renames Natools.S_Expressions.To_Atom;
-----------------------
-- Test Dictionaries --
-----------------------
LF : constant Character := Ada.Characters.Latin_1.LF;
Dict_64 : constant Natools.Smaz_64.Dictionary
:= (Last_Code => 59,
Values_Last => 119,
Variable_Length_Verbatim => False,
Max_Word_Length => 6,
Offsets => (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 20, 22,
24, 25, 26, 28, 30, 31, 32, 36, 38, 40, 42, 44, 45, 47, 49, 51, 53,
56, 60, 63, 65, 68, 70, 72, 74, 76, 80, 82, 84, 88, 90, 92, 94, 98,
101, 102, 103, 105, 111, 112, 114, 115, 118),
Values => " ee stainruos l dt enescm p"
& Character'Val (16#C3#) & Character'Val (16#A9#)
& "pd de lere ld"
& "e" & LF & "on cqumede mentes aiquen teerou r sque , is m q"
& "ue" & Character'Val (16#C3#) & Character'Val (16#A0#)
& " v'tiweblogfanj." & LF & LF & "ch",
Hash => Natools.Smaz_Test_Base_64_Hash.Hash'Access);
Dict_64_V : constant Natools.Smaz_64.Dictionary
:= (Last_Code => 59,
Values_Last => 119,
Variable_Length_Verbatim => True,
Max_Word_Length => 6,
Offsets => (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 20, 22,
24, 25, 26, 28, 30, 31, 32, 36, 38, 40, 42, 44, 45, 47, 49, 51, 53,
56, 60, 63, 65, 68, 70, 72, 74, 76, 80, 82, 84, 88, 90, 92, 94, 98,
101, 102, 103, 105, 111, 112, 114, 115, 118),
Values => " ee stainruos l dt enescm p"
& Character'Val (16#C3#) & Character'Val (16#A9#)
& "pd de lere ld"
& "e" & LF & "on cqumede mentes aiquen teerou r sque , is m q"
& "ue" & Character'Val (16#C3#) & Character'Val (16#A0#)
& " v'tiweblogfanj." & LF & LF & "ch",
Hash => Natools.Smaz_Test_Base_64_Hash.Hash'Access);
------------------------------
-- Local Helper Subprograms --
------------------------------
function Decimal_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 Decimal_Image;
procedure Generic_Roundtrip_Test
(Test : in out NT.Test;
Dict : in Smaz.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.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.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.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.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 decompression of " & Image (Compressed));
end if;
Test.Report_Exception (Error, NT.Fail);
end;
end Generic_Roundtrip_Test;
procedure Roundtrip_Test is new Generic_Roundtrip_Test
(Natools.Smaz_256, Decimal_Image);
procedure Roundtrip_Test is new Generic_Roundtrip_Test
(Natools.Smaz_64, Direct_Image);
-------------------------
-- Complete Test Suite --
-------------------------
procedure All_Tests (Report : in out NT.Reporter'Class) is
begin
Report.Section ("Base 256");
All_Tests_256 (Report);
Report.End_Section;
Report.Section ("Base 64");
All_Tests_64 (Report);
Report.End_Section;
end All_Tests;
------------------------------
-- Test Suite for Each Base --
------------------------------
procedure All_Tests_256 (Report : in out NT.Reporter'Class) is
begin
Test_Validity_256 (Report);
Sample_Strings_256 (Report);
end All_Tests_256;
procedure All_Tests_64 (Report : in out NT.Reporter'Class) is
begin
Test_Validity_64 (Report);
Sample_Strings_64 (Report);
Sample_Strings_VLV_64 (Report);
end All_Tests_64;
-------------------------------
-- Individual Base-256 Tests --
-------------------------------
procedure Sample_Strings_256 (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_256;
procedure Test_Validity_256 (Report : in out NT.Reporter'Class) is
Test : NT.Test := Report.Item ("Test dictionary validity");
begin
if not Natools.Smaz_256.Is_Valid (Smaz_Original.Dictionary) then
Test.Fail;
end if;
exception
when Error : others => Test.Report_Exception (Error);
end Test_Validity_256;
------------------------------
-- Individual Base-64 Tests --
------------------------------
procedure Sample_Strings_64 (Report : in out NT.Reporter'Class) is
Test : NT.Test := Report.Item ("Roundtrip on sample strings");
begin
Roundtrip_Test (Test, Dict_64,
"Simple Test",
To_SEA ("+TBGSVYA+UBQE"));
-- <S>imp* <T>*t
Roundtrip_Test (Test, Dict_64,
"SiT",
To_SEA ("/ATlGV"));
-- <SiT> smaller than <S>i<T> ("+TBG+UB")
Roundtrip_Test (Test, Dict_64,
"sIMple TEST_WITH_14_B",
To_SEA ("D9J1EVYA8UVETR1XXlEVI9VM08lQ"));
-- s<IM>p* <TE ST_ WIT H_1 4_B>
-- TE 001010_10 1010_0010 00
-- ST_ 110010_10 0010_1010 11_111010
-- WIT 111010_10 1001_0010 00_101010
-- H_1 000100_10 1111_1010 10_001100
-- 4_B 001011_00 1111_1010 01_000010
Roundtrip_Test (Test, Dict_64,
"'7B_Verbatim'",
To_SEA ("0+3IC9lVlJnYF1S0"));
-- '<7B_Verb >a*m'
-- 7 111011_00 0100
-- B_V 010000_10 1111_1010 01_101010
-- erb 101001_10 0100_1110 01_000110
-- "erb" could have been encoded separately as "o+iB", which has
-- the same length, but the tie is broken in favor of the longer
-- verbatim fragment to help with corner cases.
Roundtrip_Test (Test, Dict_64,
"'49 bytes of data to show a verbatim count issue'",
To_SEA ("090kTgIWenLK3NFEFAEKs/Ao92dAFAzo+iBF1SepHOvDJB0"));
-- '<49 by >tsof_ata_to_< how>_a_ve<b>atm_ontisue'
-- e_ d s r i cu _s
-- 49 001011_00 1001_1100 10
-- by 000001_00 0100_0110 10_011110
-- how 000101_10 1111_0110 11_101110
--- b 010001_10 0000
Roundtrip_Test (Test, Dict_64,
Character'Val (16#C3#) & Character'Val (16#A9#) & 'v'
& Character'Val (16#C3#) & Character'Val (16#A8#) & "nement",
To_SEA ("Uz9DjKHBi"));
-- év<è >nement
-- è 110000_11 0001_0101 00
exception
when Error : others => Test.Report_Exception (Error);
end Sample_Strings_64;
procedure Sample_Strings_VLV_64 (Report : in out NT.Reporter'Class) is
Test : NT.Test := Report.Item
("Roundtrip on sample strings with variable-length verbatim");
begin
Roundtrip_Test (Test, Dict_64_V,
"Simple Test",
To_SEA ("+TBGSVYA+UBQE"));
-- <S>imp* <T>*t
Roundtrip_Test (Test, Dict_64_V,
"SiT",
To_SEA ("8TlGV"));
-- <SiT> smaller than <S>i<T> ("+TBG+UB")
Roundtrip_Test (Test, Dict_64_V,
"sIMple TEST_WITH_14_B",
To_SEA ("D9J1EVYA/KUVETR1XXlEVI9VM08lQ"));
-- s<IM>p* < TE ST_ WIT H_1 4_B>
-- TE 001010_10 1010_0010 00
-- ST_ 110010_10 0010_1010 11_111010
-- WIT 111010_10 1001_0010 00_101010
-- H_1 000100_10 1111_1010 10_001100
-- 4_B 001011_00 1111_1010 01_000010
Roundtrip_Test (Test, Dict_64_V,
"'7B_Verbatim'",
To_SEA ("0/D3AC9lVlJnYF1S0"));
-- '< 7B_Verb >a*m'
-- 7 111011_00 0000
-- B_V 010000_10 1111_1010 01_101010
-- erb 101001_10 0100_1110 01_000110
exception
when Error : others => Test.Report_Exception (Error);
end Sample_Strings_VLV_64;
procedure Test_Validity_64 (Report : in out NT.Reporter'Class) is
Test : NT.Test := Report.Item ("Test dictionary validity");
begin
if not Natools.Smaz_64.Is_Valid (Dict_64) then
Test.Fail;
end if;
if not Natools.Smaz_64.Is_Valid (Dict_64_V) then
Test.Fail;
end if;
exception
when Error : others => Test.Report_Exception (Error);
end Test_Validity_64;
end Natools.Smaz_Tests;