Sabre\VObject\Recur\EventIterator::next PHP Method

    public function next()
    {
        $this->currentOverriddenEvent = null;
        $this->counter++;
        if ($this->nextDate) {
            // We had a stored value.
            $nextDate = $this->nextDate;
            $this->nextDate = null;
        } else {
            // We need to ask rruleparser for the next date.
            // We need to do this until we find a date that's not in the
            // exception list.
            do {
                if (!$this->recurIterator->valid()) {
                    $nextDate = null;
                    break;
                }
                $nextDate = $this->recurIterator->current();
                $this->recurIterator->next();
            } while (isset($this->exceptions[$nextDate->getTimeStamp()]));
        }
        // $nextDate now contains what rrule thinks is the next one, but an
        // overridden event may cut ahead.
        if ($this->overriddenEventsIndex) {
            $offset = end($this->overriddenEventsIndex);
            $timestamp = key($this->overriddenEventsIndex);
            if (!$nextDate || $timestamp < $nextDate->getTimeStamp()) {
                // Overridden event comes first.
                $this->currentOverriddenEvent = $this->overriddenEvents[$offset];
                // Putting the rrule next date aside.
                $this->nextDate = $nextDate;
                $this->currentDate = $this->currentOverriddenEvent->DTSTART->getDateTime($this->timeZone);
                // Ensuring that this item will only be used once.
                array_pop($this->overriddenEventsIndex);
                // Exit point!
                return;
            }
        }
        $this->currentDate = $nextDate;
    }

    /**
     * A pretty slow test. Had to be marked as 'medium' for phpunit to not die
     * after 1 second. Would be good to optimize later.
     *
     * @medium
     */
    function testGetDTEnd()
    {
        $ics = <<<ICS
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Apple Inc.//iCal 4.0.4//EN
CALSCALE:GREGORIAN
BEGIN:VEVENT
TRANSP:OPAQUE
DTEND;TZID=America/New_York:20070925T170000
UID:uuid
DTSTAMP:19700101T000000Z
LOCATION:
DESCRIPTION:
STATUS:CONFIRMED
SEQUENCE:18
SUMMARY:Stuff
DTSTART;TZID=America/New_York:20070925T160000
CREATED:20071004T144642Z
RRULE:FREQ=MONTHLY;INTERVAL=1;UNTIL=20071030T035959Z;BYDAY=5TU
END:VEVENT
END:VCALENDAR
ICS;
        $vObject = Reader::read($ics);
        $it = new Recur\EventIterator($vObject, (string) $vObject->VEVENT->UID);
        while ($it->valid()) {
            $it->next();
        }
        // If we got here, it means we were successful. The bug that was in the
        // system before would fail on the 5th tuesday of the month, if the 5th
        // tuesday did not exist.
        $this->assertTrue(true);
    }