public void TestFormationOfUrl()
        {
            string id           = "32638320";
            string access_token = "44b3c3bebd86029c26eb607cc2144247bcaa27c77a55b62922c3d219107b0316c0cc5c263d379e3d2a4a2";
            string url          = "https://api.vk.com/method/users.get";
            VkApi  vk           = new VkApi(new TestrequestProvider());
            string result       = vk.GetUsers(url, id, access_token);

            Assert.AreEqual("ok", result);
        }
        public void TestGetOneUser()
        {
            string id           = "32638320";
            string access_token = "44b3c3bebd86029c26eb607cc2144247bcaa27c77a55b62922c3d219107b0316c0cc5c263d379e3d2a4a2";
            string url          = "http://localhost:3000/testGetUsers";
            VkApi  vk           = new VkApi(new RealRequestProvider());
            Error  error;
            string expected = "Катомин";

            List <User> users = vk.GetUsers(url, id, access_token, out error);

            Assert.AreEqual(expected, users[0].last_name);
        }