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# -*- mode: perl -*-
##
## this is the 03stream.t test from Compress::Bzip2 1.03 with no changes
## (except for comments)
##
## - seems to run a lot slower than the 1.03 test, probably because the add
## routine is now perl, not perlxs.
##
# streaming test
use strict;
use Test::More tests => 208;
use Compress::Bzip2 qw(compress_init decompress_init decompress);
# globals
my $Level = 1;
my @AlNum = ('A'..'Z','a'..'z','0'..'9',' ');
my ($In,$Out) = (0,0);
my $Prefix = 0;
# subs
sub try {
my ($str,$chunk,$inc) = @_;
$chunk ||= 100;
$inc ||= 0;
my $stream = compress_init();
# piece it into chunks and feed it to the monster
my ($size,$pos,$out,$done,$status,$orig) = ($chunk,0,'');
for(;;) {
if($pos > length $str) {
$status = $stream->finish();
$done = 1;
} else {
my $piece = substr $str,$pos,$size;
$pos += $size;
$size += $inc;
$status = $stream->add($piece);
}
return 0 if not defined $status;
$out .= $status;
last if $done;
}
# see if we can get it back
if($Prefix) {
$orig = decompress($stream->prefix().$out);
} else {
$stream = decompress_init();
($size,$pos,$orig,$done) = ($chunk,0,'');
for(;;) {
if($pos > length $out) {
$status = $stream->finish();
$done = 1;
} else {
my $piece = substr $out,$pos,$size;
$pos += $size;
$size += $inc;
$status = $stream->add($piece);
}
return 0 if not defined $status;
$orig .= $status;
last if $done;
}
}
$In += length $orig;
$Out += length $out;
return $orig eq $str ? 1 : 0;
}
# tests
# some short strings
my $sum;
ok(try(''),'empty string');
pass('undef');
$sum = 0;
$sum += try($_) for @AlNum;
is($sum,scalar(@AlNum),'alphanumerics');
ok(try('FOO'),'FOO');
ok(try('bar'),'bar');
ok(try(' '),'spaces');
# references are supposed to work too
my $str = 'reference test';
$sum = 0;
for(1..5) {
$str = \$str;
$sum += try($str);
}
is($sum,5,'reference tests');
# random strings
$sum = 0;
for my $random(1..100) {
$Level = 9 if 80 == $random;
my $str = '';
$str .= $AlNum[rand @AlNum] for 1..rand 100;
$sum += try($str);
}
is($sum,100,'100 random strings');
# long strings with repetition
($In,$Out) = (0,0);
for my $random(1..100) {
$Level = 1 if 20 == $random;
my $str = '';
$str .= ($AlNum[rand @AlNum] x rand 1000) for 1..100+rand 900;
ok(try($str),"long string $random");
}
#diag(sprintf "compression ratio %.2f%%",100*$Out/$In);
# binary strings
($In,$Out) = (0,0);
for my $random(1..100) {
$Level = 9 if 80 == $random;
my $str = '';
$str .= chr(rand 256) for 1..1000+rand 9000;
ok(try($str),"binary string $random");
}
#diag(sprintf "compression ratio %.2f%%",100*$Out/$In);
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