public function testAliasesSymmetry() {
		$data = array(
			'house' => array('Haus', 'Häuser')
		);
		Catalog::write('message', 'de', $data, array('name' => 'runtime'));

		$filters = Message::aliases();
		$t = $filters['t'];
		$tn = $filters['tn'];

		$expected = Message::translate('house', array('locale' => 'de'));
		$result = $t('house', array('locale' => 'de'));
		$this->assertEqual($expected, $result);

		$expected = Message::translate('house', array('locale' => 'de', 'count' => 1));
		$result = $tn('house', 'houses', 1, array('locale' => 'de'));
		$this->assertEqual($expected, $result);

		$expected = Message::translate('house', array('locale' => 'de', 'count' => 3));
		$result = $tn('house', 'houses', 3, array('locale' => 'de'));
		$this->assertEqual($expected, $result);
	}