public async Task Get_UserInfo_Success()
        {
            string ip           = "40.0.0.1";
            string iata         = "MOW";
            string callbackName = "useriata";
            string json         = String.Concat(callbackName, "({'iata':'", iata, "','name':'Москва'})");

            _mockRequestManager
            .Setup(r => r.Get(It.IsAny <Uri>(), It.IsAny <string>(), It.IsAny <bool>()))
            .ReturnsAsync(json);

            var userInfo = await _userInfoProvider.GetUserLocationAsync(ip);

            Assert.IsNotNull(userInfo, "UserInfo is null.");
            Assert.AreEqual(userInfo.Code, iata, "IATA code is not equal.");
        }