+ok (!$background->fetch($sessionID, $background->id), "testing fetch");
+
+$background->set({ key1 => 'value1', key2 => 'value2' });
+is ($background->get('key1'), 'value1', 'fetched extra value for key key1');
+is ($background->get('key2'), 'value2', 'fetched extra value for key key2');
+
+$background->set({ size => 666 });
+is ($background->size, "56", '->set() does not scribble over private object data');
+