Description: ------------ At the moment, Services_Hatena instantiates XML_RPC clients in the middle of methods to get code. Basically, classes do: class Foo extends Services_Hatena { public function execute() { // new XML_RPC_Client() in here } } If you were to change the API to expect you to instantiate an XML_RPC_Client in the constructor, testability is markedly improved - you can inject a mock client which provides dummy results, but otherwise asserts your package functions correctly. IE - You could do: $service = new Services_Hatena_Bookmarknum(new XML_RPC_Client()); $service = new Services_Hatena_Bookmarknum(new Mock_XML_RPC_Client()); (or pass it in to the factory method) If the factory doesn't get passed any particular arguments, you could still instantiate the relevant XML_RPC client. This would prevent Bug #14872 from ever occurring again.