public function testConferenceWithOnHandler()
{
$say = new Say('Welcome to the conference. Press the pound key to exit.');
// Set up an On object to handle the event.
// Note - statically calling the properties of the Event object can be used
// as the first parameter to the On Object constructor.
$on = new On(Event::$join, NULL, $say);
$options = array('id' => 1234, 'mute' => 'false', 'terminator' => '#', 'playTones' => false, 'name' => 'foo', 'on' => $on);
$tropo = new Tropo();
$tropo->Conference($options);
$this->assertEquals('{"tropo":[{"conference":{"id":1234,"mute":false,"on":{"event":"join","say":{"value":"Welcome to the conference. Press the pound key to exit."},"name":"foo","playTones":false,"terminator":"#"}}]}', sprintf($tropo));
}