public function testIsValid()
{
// test invalid by normal validation actions
$rrule = new Calendar_Model_Rrule(array('interval' => 'NotAnInt'), true);
$rrule->bypassFilters = false;
$this->assertFalse($rrule->isValid(false));
// count and until are not allowed together
$rrule = new Calendar_Model_Rrule(array('count' => '10', 'until' => '2012-01-09 09:33:00'), true);
$this->assertFalse($rrule->isValid(false), 'until & count');
// test invalid by setFromString
$this->setExpectedException('Tinebase_Exception_Record_Validation');
$rruleString = "FREQ=WEEKLY;INTERVAL=NotAnInt";
$rrule = new Calendar_Model_Rrule(array());
$rrule->setFromString($rruleString);
}