### Question:
RestAuthConfirmationCallbackHandler extends AbstractRestAuthCallbackHandler<ConfirmationCallback> { public String getCallbackClassName() { return CALLBACK_NAME; }  ConfirmationCallback handle(HttpServletRequest request, HttpServletResponse response,
            JsonValue postBody, ConfirmationCallback originalCallback); String getCallbackClassName(); JsonValue convertToJson(ConfirmationCallback callback, int index); ConfirmationCallback convertFromJson(ConfirmationCallback callback, JsonValue jsonCallback);  }### Answer:
@Test public void shouldGetCallbackClassName() { String callbackClassName = restAuthConfirmationCallbackHandler.getCallbackClassName(); assertEquals(ConfirmationCallback.class.getSimpleName(), callbackClassName); }