/**
* @ŧest
*/
public function testSubMonth()
{
$date = new HammerTime('2014-05-31 12:00:00');
$date->subMonths(1);
$this->assertEquals(new HammerTime('2014-04-30 12:00:00'), $date);
$date = new HammerTime('2014-05-31 12:00:00');
$date->subMonths(2);
$this->assertEquals(new HammerTime('2014-03-31 12:00:00'), $date);
}
