public function testCustomData()
 {
     $expected = array("registration_id" => "", "collapse_key" => AndroidMessage::DEFAULT_COLLAPSE_KEY, "data.message" => "", "custom" => array("foo" => "bar"));
     $msg = new AndroidMessage();
     $msg->setData(array("custom" => array("foo" => "bar")));
     $this->assertEquals($expected, $msg->getMessageBody());
 }