1 files changed, 108 insertions, 0 deletions
diff --git a/scripts/t/Dpkg_Compression.t b/scripts/t/Dpkg_Compression.t
new file mode 100644
index 0000000..3babe5f
--- /dev/null
+++ b/scripts/t/Dpkg_Compression.t
@@ -0,0 +1,108 @@
+#!/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 strict;
+use warnings;
+
+use Test::More tests => 13;
+use Test::Dpkg qw(:paths);
+
+use_ok('Dpkg::Compression');
+use_ok('Dpkg::Compression::FileHandle');
+
+my $tmpdir = test_get_temp_path();
+my @lines = ("One\n", "Two\n", "Three\n");
+my $fh;
+
+sub test_write {
+    my ($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 $read_fh, '-|', 'zcat', "$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)");
+}
+
+# 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(), $old_level, 'reset default compression level');
+
+# Test write on uncompressed file
+test_write("$tmpdir/myfile", \&check_uncompressed);
+
+# 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");