public function testGetSecond()
{
$calendar = new Calendar();
$second = $calendar->getSecond(new \DateTime('2012-01-01 17:23:49'));
$this->assertInstanceOf('CalendR\\Period\\Second', $second);
$second = $calendar->getSecond(2012, 1, 1, 17, 23, 49);
$this->assertInstanceOf('CalendR\\Period\\Second', $second);
}