public async Task TestPostValuesAsync()
        {
            try
            {
                var client = new InfluxDBClient (influxUrl, dbUName, dbpwd);
                var val = new Random ();
                var values = new Dictionary<string, double> () { { "filed1", val.NextDouble () * 10 }, { "filed2", val.NextDouble () * 10 }, { "filed3", val.NextDouble () * 10 } };
                var r = await client.PostValuesAsync (dbName, measurementName, DateTime.UtcNow.ToEpoch (TimePrecision.Seconds), TimePrecision.Seconds, "testTag=testTagValue",values);
                Assert.IsTrue (r, "PostValuesAsync retunred false");
            }
            catch ( Exception e )
            {

                Assert.Fail ("Unexpected exception of type {0} caught: {1}",
                            e.GetType (), e.Message);
                return;
            }
        }