diff --git a/tests/compress/archive/.gitkeep b/tests/compress/archive/.gitkeep
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/compress/compress_test.php b/tests/compress/compress_test.php
new file mode 100644
index 0000000000..a88e5e5b32
--- /dev/null
+++ b/tests/compress/compress_test.php
@@ -0,0 +1,157 @@
+<?php
+/**
+ *
+ * @package testing
+ * @copyright (c) 2012 phpBB Group
+ * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+ *
+ */
+
+require_once __DIR__ . '/../../phpBB/includes/functions.php';
+require_once __DIR__ . '/../../phpBB/includes/functions_admin.php';
+require_once __DIR__ . '/../../phpBB/includes/functions_compress.php';
+
+class phpbb_compress_test extends phpbb_test_case
+{
+	const EXTRACT_DIR = '/extract/';
+	const ARCHIVE_DIR = '/archive/';
+
+	private $path;
+	protected $filelist = array(
+		'1.txt',
+		'dir/2.txt',
+		'dir/3.txt',
+		'dir/subdir/4.txt',
+	);
+
+	protected function setUp()
+	{
+		// Required for compress::add_file
+		global $phpbb_root_path;
+		$phpbb_root_path = '';
+
+		$this->path = __DIR__ . '/fixtures/';
+		$compress = new compress();
+
+		if (sizeof($compress->methods()) < 4)
+		{
+			$this->markTestSkipped('PHP needs to be compiled with --with-zlib and --with-bz2 in order to run these tests');
+		}
+	}
+
+	protected function tearDown()
+	{
+		foreach (array(__DIR__ . self::EXTRACT_DIR, __DIR__ . self::ARCHIVE_DIR) as $dir) {
+			$this->clear_dir($dir);
+		}
+	}
+
+	protected function clear_dir($dir)
+	{
+		$iterator = new DirectoryIterator($dir);
+		foreach ($iterator as $fileinfo)
+		{
+			$name = $fileinfo->getFilename();
+			$path = $fileinfo->getPathname();
+
+			if ($name[0] !== '.')
+			{
+				if ($fileinfo->isDir())
+				{
+					$this->clear_dir($path);
+					rmdir($path);
+				}
+				else
+				{
+					unlink($path);
+				}
+			}
+		}
+	}
+
+	protected function archive_files($compress)
+	{
+		$compress->add_file($this->path . '1.txt', $this->path);
+		$compress->add_file(
+			'tests/compress/fixtures/dir/',
+			'tests/compress/fixtures/',
+			'',
+			// The comma here is not an error, this is a comma-separated list
+			'subdir/4.txt,3.txt'
+		);
+		$compress->add_custom_file($this->path . 'dir/3.txt', 'dir/3.txt');
+		$compress->add_data(file_get_contents($this->path . 'dir/subdir/4.txt'), 'dir/subdir/4.txt');
+	}
+
+	protected function valid_extraction()
+	{
+		foreach ($this->filelist as $filename)
+		{
+			$path = __DIR__ . self::EXTRACT_DIR . $filename;
+			$this->assertTrue(file_exists($path));
+
+			// Check the file's contents is correct
+			$this->assertEquals(basename($filename, '.txt') . "\n", file_get_contents($path));
+		}
+	}
+
+	public function tar_archive_list()
+	{
+		return array(
+			array('archive.tar', '.tar'),
+			array('archive.tar.gz', '.tar.gz'),
+			array('archive.tar.bz2', '.tar.bz2'),
+		);
+	}
+
+	/**
+	 * @dataProvider tar_archive_list
+	 */
+	public function test_extract_tar($filename, $type)
+	{
+		$compress = new compress_tar('r', $this->path . $filename);
+		$compress->extract('tests/compress/' . self::EXTRACT_DIR);
+		$this->valid_extraction();
+	}
+
+	public function test_extract_zip()
+	{
+		$compress = new compress_zip('r', $this->path . 'archive.zip');
+		$compress->extract('tests/compress/' . self::EXTRACT_DIR);
+		$this->valid_extraction();
+	}
+
+	/**
+	 * @depends test_extract_tar
+	 * @dataProvider tar_archive_list
+	 */
+	public function test_compress_tar($filename, $type)
+	{
+		$tar = __DIR__ . self::ARCHIVE_DIR . $filename;
+		$compress = new compress_tar('w', $tar);
+		$this->archive_files($compress);
+		$compress->close();
+		$this->assertTrue(file_exists($tar));
+
+		$compress->mode = 'r';
+		$compress->open();
+		$compress->extract('tests/compress/' . self::EXTRACT_DIR);
+		$this->valid_extraction();
+	}
+
+	/**
+	 * @depends test_extract_zip
+	 */
+	public function test_compress_zip()
+	{
+		$zip =  __DIR__ . self::ARCHIVE_DIR . 'archive.zip';
+		$compress = new compress_zip('w', $zip);
+		$this->archive_files($compress);
+		$compress->close();
+		$this->assertTrue(file_exists($zip));
+
+		$compress = new compress_zip('r', $zip);
+		$compress->extract('tests/compress/' . self::EXTRACT_DIR);
+		$this->valid_extraction();
+	}
+}
diff --git a/tests/compress/extract/.gitkeep b/tests/compress/extract/.gitkeep
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/compress/fixtures/1.txt b/tests/compress/fixtures/1.txt
new file mode 100644
index 0000000000..d00491fd7e
--- /dev/null
+++ b/tests/compress/fixtures/1.txt
@@ -0,0 +1 @@
+1
diff --git a/tests/compress/fixtures/archive.tar b/tests/compress/fixtures/archive.tar
new file mode 100644
index 0000000000..54ed56084e
Binary files /dev/null and b/tests/compress/fixtures/archive.tar differ
diff --git a/tests/compress/fixtures/archive.tar.bz2 b/tests/compress/fixtures/archive.tar.bz2
new file mode 100644
index 0000000000..04c0eccd74
Binary files /dev/null and b/tests/compress/fixtures/archive.tar.bz2 differ
diff --git a/tests/compress/fixtures/archive.tar.gz b/tests/compress/fixtures/archive.tar.gz
new file mode 100644
index 0000000000..195e7a060a
Binary files /dev/null and b/tests/compress/fixtures/archive.tar.gz differ
diff --git a/tests/compress/fixtures/archive.zip b/tests/compress/fixtures/archive.zip
new file mode 100644
index 0000000000..bdb618fc26
Binary files /dev/null and b/tests/compress/fixtures/archive.zip differ
diff --git a/tests/compress/fixtures/dir/2.txt b/tests/compress/fixtures/dir/2.txt
new file mode 100644
index 0000000000..0cfbf08886
--- /dev/null
+++ b/tests/compress/fixtures/dir/2.txt
@@ -0,0 +1 @@
+2
diff --git a/tests/compress/fixtures/dir/3.txt b/tests/compress/fixtures/dir/3.txt
new file mode 100644
index 0000000000..00750edc07
--- /dev/null
+++ b/tests/compress/fixtures/dir/3.txt
@@ -0,0 +1 @@
+3
diff --git a/tests/compress/fixtures/dir/subdir/4.txt b/tests/compress/fixtures/dir/subdir/4.txt
new file mode 100644
index 0000000000..b8626c4cff
--- /dev/null
+++ b/tests/compress/fixtures/dir/subdir/4.txt
@@ -0,0 +1 @@
+4