public function testSkipWday()
{
// $_n == +1
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-12 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_SUNDAY)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-09 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_THURSDAY)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-15 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_WEDNESDAY)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-05 00:00:00');
$this->assertEquals('2009-04-12 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_SUNDAY)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-05 00:00:00');
$this->assertEquals('2009-04-09 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_THURSDAY)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-05 00:00:00');
$this->assertEquals('2009-04-08 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_WEDNESDAY)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-04 00:00:00');
$this->assertEquals('2009-04-05 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_SUNDAY)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-04 00:00:00');
$this->assertEquals('2009-04-09 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_THURSDAY)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-04 00:00:00');
$this->assertEquals('2009-04-08 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_WEDNESDAY)->toString(Tinebase_Record_Abstract::ISO8601LONG));
// $_n == +2
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-19 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_SUNDAY, 2)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-21 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_TUESDAY, 2)->toString(Tinebase_Record_Abstract::ISO8601LONG));
// $_n == -1
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-06 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_MONDAY, -1)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-02 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_THURSDAY, -1)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-01 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_WEDNESDAY, -1)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-05 00:00:00');
$this->assertEquals('2009-04-04 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_SATURDAY, -1)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-04 00:00:00');
$this->assertEquals('2009-03-29 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_SUNDAY, -1)->toString(Tinebase_Record_Abstract::ISO8601LONG));
// $_n == -2
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-03-29 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_SUNDAY, -2)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-03-31 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_TUESDAY, -2)->toString(Tinebase_Record_Abstract::ISO8601LONG));
// $_considerDateItself == TRUE
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-08 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_WEDNESDAY, 1, TRUE)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$this->assertEquals('2009-04-08 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_WEDNESDAY, -1, TRUE)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-15 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_WEDNESDAY, 2, TRUE)->toString(Tinebase_Record_Abstract::ISO8601LONG));
$date = new Tinebase_DateTime('2009-04-08 00:00:00');
$this->assertEquals('2009-04-01 00:00:00', Calendar_Model_Rrule::skipWday($date, Calendar_Model_Rrule::WDAY_WEDNESDAY, -2, TRUE)->toString(Tinebase_Record_Abstract::ISO8601LONG));
}
