public function testEscapeUnescape() {
		$this->adapter->mo = false;
		$file = "{$this->_path}/de/LC_MESSAGES/default.po";

		$chars = array(
			"\0" => '\000',
			"\1" => '\001',
			"\2" => '\002',
			"\3" => '\003',
			"\4" => '\004',
			"\5" => '\005',
			"\6" => '\006',
			"\7" => '\a',
			"\10" => '\b',
			"\11" => '\t',
			"\12" => '\n',
			"\13" => '\v',
			"\14" => '\f',
			"\15" => '\r',
			"\16" => '\016',
			"\17" => '\017',
			"\20" => '\020',
			"\21" => '\021',
			"\22" => '\022',
			"\23" => '\023',
			"\24" => '\024',
			"\25" => '\025',
			"\26" => '\026',
			"\30" => '\030',
			"\31" => '\031',
			"\32" => '\032',
			"\33" => '\033',
			"\34" => '\034',
			"\35" => '\035',
			"\36" => '\036',
			"\37" => '\037',
			'"' => '\"',
			'\\' => '\\\\'
		);

		foreach ($chars as $unescaped => $escaped) {
			$ord = decoct(ord($unescaped));

			$catalog = array(
				"this is the{$unescaped}message" => array(
					'id' => "this is the{$unescaped}message",
					'ids' => array('singular' => "this is the{$unescaped}message"),
					'flags' => array(),
					'translated' => "this is the{$unescaped}translation",
					'occurrences' => array(),
					'comments' => array()
				)
			);
			$po = <<<EOD
msgid "this is the{$escaped}message"
msgstr "this is the{$escaped}translation"
EOD;
			file_put_contents($file, $po);
			$result = $this->adapter->read('message', 'de', null);
			$message  = "`{$unescaped}` (ASCII octal {$ord}) was not escaped to `{$escaped}`";
			$message .= "\n{:message}";
			$this->assertEqual($catalog, $result, $message);

			unlink($file);

			$this->adapter->write('message', 'de', null, $catalog);
			$result = file_get_contents($file);
			$message  = "`{$escaped}` was not unescaped to `{$unescaped}` (ASCII octal {$ord})";
			$message .= "\n{:message}";
			$this->assertPattern('/' . preg_quote($po, '/') . '/', $result, $message);

			unlink($file);
		}
	}