public function testTimezoneToStringOutput()
 {
     $tz = new qCal_Timezone("America/Los_Angeles", -28800, "PST");
     $tz->setFormat("T P");
     $this->assertEqual($tz->__toString(), "PST -08:00");
     $tz->setFormat("Z");
     $this->assertEqual($tz->__toString(), "-28800");
 }