public function testPreferredFromConsoleRequestEmptyLocales() {
		$request = new ConsoleRequest(array(
			'env' => array('LC_ALL' => 'C', 'LANG' => null, 'LANGUAGE' => null)
		));
		$result = Locale::preferred($request);
		$this->assertNull($result);

		$request = new ConsoleRequest(array(
			'env' => array('LC_ALL' => 'POSIX', 'LANG' => null, 'LANGUAGE' => null)
		));
		$result = Locale::preferred($request);
		$this->assertNull($result);

		$request = new ConsoleRequest(array(
			'env' => array('LC_ALL' => '', 'LANG' => null, 'LANGUAGE' => null)
		));
		$result = Locale::preferred($request);
		$this->assertNull($result);
	}