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#!/usr/bin/perl
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
use v5.36;
use Test::More tests => 48;
use Test::Dpkg qw(:paths);
use IPC::Cmd qw(can_run);
use ok 'Dpkg::Compression';
use ok 'Dpkg::Compression::FileHandle';
my $tmpdir = test_get_temp_path();
my @lines = ("One\n", "Two\n", "Three\n");
my $fh;
my $have_gunzip = can_run('gunzip');
sub test_write {
my ($filename, $check_result) = @_;
$fh = Dpkg::Compression::FileHandle->new();
open $fh, '>', $filename or die 'open failed';
print { $fh } $lines[0];
syswrite($fh, $lines[1]);
printf { $fh } '%s', $lines[2];
close $fh or die 'close failed';
$check_result->($filename, 'std functions');
unlink $filename or die "cannot unlink $filename";
$fh = Dpkg::Compression::FileHandle->new();
$fh->open($filename, 'w');
$fh->print($lines[0]);
$fh->write($lines[1], length($lines[1]));
$fh->printf('%s', $lines[2]);
$fh->close() or die 'close failed';
$check_result->($filename, 'IO::Handle methods');
}
sub check_uncompressed {
my ($filename, $method) = @_;
open(my $read_fh, '<', $filename) or die "cannot read $filename";
my @read = <$read_fh>;
close $read_fh or die 'cannot close';
is_deeply(\@lines, \@read, "$filename correctly written ($method)");
}
sub check_compressed {
my ($filename, $method) = @_;
open my $read_fh, '-|', 'gunzip', '-c', "$tmpdir/myfile.gz"
or die 'cannot fork zcat';
my @read = <$read_fh>;
close $read_fh or die 'cannot close';
is_deeply(\@lines, \@read, "$filename correctly written ($method)");
}
sub test_read {
my $filename = shift;
$fh = Dpkg::Compression::FileHandle->new();
open($fh, '<', $filename) or die 'open failed';
my @read = <$fh>;
close $fh or die 'close failed';
is_deeply(\@lines, \@read, "$filename correctly read (std functions)");
@read = ();
$fh = Dpkg::Compression::FileHandle->new();
$fh->open($filename, 'r') or die 'open failed';
@read = $fh->getlines();
$fh->close() or die 'close failed';
is_deeply(\@lines, \@read, "$filename correctly read (IO::Handle methods)");
}
# Check compression properties.
my @compressors = compression_get_list();
is_deeply([ sort @compressors ] , [ qw(bzip2 gzip lzma xz) ],
'supported compressors');
is(compression_get_default(), 'xz', 'default compressor is xz');
eval {
compression_set_default('invented-compressor');
};
ok($@, 'cannot set compressor to an unsupported name');
is(compression_get_default(), 'xz', 'default compressor is still xz');
compression_set_default('gzip');
is(compression_get_default(), 'gzip', 'default compressor changed to gzip');
compression_set_default('xz');
is(compression_get_default(), 'xz', 'default compressor reset to xz');
ok(compression_is_supported('gzip'), 'gzip is supported');
ok(compression_is_supported('xz'), 'xz is supported');
ok(compression_is_supported('bzip2'), 'bzip2 is supported');
ok(compression_is_supported('lzma'), 'lzma is supported');
is(compression_guess_from_filename('filename'), undef,
'compressor <none> guessed from "filename"');
is(compression_guess_from_filename('filename.gz'), 'gzip',
'compressor <none> guessed from "filename"');
is(compression_guess_from_filename('filename.xz'), 'xz',
'compressor <none> guessed from "filename"');
is(compression_guess_from_filename('filename.bz2'), 'bzip2',
'compressor <none> guessed from "filename"');
is(compression_guess_from_filename('filename.lzma'), 'lzma',
'compressor <none> guessed from "filename"');
is(compression_get_file_extension('gzip'), 'gz', 'gzip file ext');
is(compression_get_file_extension('xz'), 'xz', 'xz file ext');
is(compression_get_file_extension('bzip2'), 'bz2', 'bzip2 file ext');
is(compression_get_file_extension('lzma'), 'lzma', 'lzma file ext');
is(compression_get_level('gzip'), 9, 'gzip level is 9');
compression_set_level('gzip', 1);
is(compression_get_level('gzip'), 1, 'gzip level is now 1');
compression_set_level('gzip');
is(compression_get_level('gzip'), 9, 'gzip level is back to 9');
is(compression_get_level('xz'), 6, 'xz level is 6');
is(compression_get_level('bzip2'), 9, 'bzip2 level is 9');
is(compression_get_level('lzma'), 6, 'lzma level is 6');
my $ext_regex = compression_get_file_extension_regex();
ok('filename.gz' =~ m/\.$ext_regex$/, '.gz matches regex');
ok('filename.xz' =~ m/\.$ext_regex$/, '.xz matches regex');
ok('filename.bz2' =~ m/\.$ext_regex$/, '.bz2 matches regex');
ok('filename.lzma' =~ m/\.$ext_regex$/, '.lzma matches regex');
# Test changing the default compression levels.
my $old_level = compression_get_default_level();
compression_set_default_level(1);
is(compression_get_default_level(), 1, 'change default compression level');
compression_set_default_level(5);
is(compression_get_default_level(), 5, 'change default compression level');
compression_set_default_level(undef);
is(compression_get_default_level(), $old_level, 'reset default compression level');
ok(! compression_is_valid_level(0), 'compression 0 is invalid');
ok(compression_is_valid_level(1), 'compression 1 is valid');
ok(compression_is_valid_level(5), 'compression 5 is valid');
ok(compression_is_valid_level(9), 'compression 9 is valid');
ok(compression_is_valid_level('fast'), 'compression fast is valid');
ok(compression_is_valid_level('best'), 'compression best is valid');
# Test write on uncompressed file.
test_write("$tmpdir/myfile", \&check_uncompressed);
SKIP: {
skip 'gunzip not available', 1 if not $have_gunzip;
# Test write on compressed file.
test_write("$tmpdir/myfile.gz", \&check_compressed);
}
# Test read on uncompressed file.
test_read("$tmpdir/myfile");
# Test read on compressed file.
test_read("$tmpdir/myfile.gz");
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