i changed setup n it works.
@Override protected void setUp() throws Exception {
MockRestServer mockRestServer = new MockRestServer();
mockRestServer.addMockCallResponseHandler(RestCommandFactoryImpl.getInstance().getBaseUrl() + "/category"
, "[ {\"id\":\"1\", \"parentId\":\"12\",\"iconURL\":\"MyIcon\",\"title\":\"APP_CATEGORY TITLE1\"}," +
"{\"id\":\"2\", \"parentId\":\"12\",\"iconURL\":\"MyIcon\",\"title\":\"APP_CATEGORY TITLE2\"} , " +
"{\"id\":\"3\", \"parentId\":\"12\",\"iconURL\":\"MyIcon\",\"title\":\"APP_CATEGORY TITLE3\"} ," +
"{\"id\":\"4\", \"parentId\":\"12\",\"iconURL\":\"MyIcon\",\"title\":\"APP_CATEGORY TITLE4\"} ," +
"{\"id\":\"5\", \"parentId\":\"12\",\"iconURL\":\"MyIcon\",\"title\":\"APP_CATEGORY TITLE5\"}," +
"{\"id\":\"6\", \"parentId\":\"11\",\"iconURL\":\"MyIcon\",\"title\":\"GAME_CATEGORY TITLE1\"}, " +
"{\"id\":\"7\", \"parentId\":\"11\",\"iconURL\":\"MyIcon\",\"title\":\"GAME_CATEGORY TITLE2\"}," +
"{\"id\":\"8\", \"parentId\":\"11\",\"iconURL\":\"MyIcon\",\"title\":\"GAME_CATEGORY TITLE3\"}," +
"{\"id\":\"9\", \"parentId\":\"11\",\"iconURL\":\"MyIcon\",\"title\":\"GAME_CATEGORY TITLE4\"}," +
"{\"id\":\"10\", \"parentId\":\"11\",\"iconURL\":\"MyIcon\",\"title\":\"GAME_CATEGORY TITLE5\"}," +
"{\"id\":\"11\", \"parentId\":null,\"iconURL\":\"MyIcon\",\"title\":\"بازی ها\"}," +
"{\"id\":\"12\", \"parentId\":null,\"iconURL\":\"MyIcon\",\"title\":\"برنامه ها\"}]");
mockRestServer.addRestCommandToMock("category", new GetAllCategoriesRestCommand());
mockRestServer.start();
super.setUp();
}