/**
* @param $interval
*
* @return \DateInterval
* @throws DateTimeObjectException
*/
private function parseDateInterval($interval)
{
try {
if (!$this->isInstanceOf($interval, 'DateInterval')) {
$interval = new StringObject($interval);
if ($interval->startsWith('P')) {
$interval = new \DateInterval($interval);
} else {
$interval = \DateInterval::createFromDateString($interval);
}
}
} catch (\Exception $e) {
throw new DateTimeObjectException(DateTimeObjectException::MSG_INVALID_DATE_INTERVAL, [$interval]);
}
return $interval;
}
public function testStartsWith2()
{
$s = new StringObject('Marry had a little lamb.');
$this->assertFalse($s->startsWith('lamb'));
}
