public async void PollJobAsync_NullJobInfo_ArgumentNullException()
        {
            var client = new ForceClient("test", "test", "v32");
            await client.PollJobAsync((JobInfoResult)null);

            // expects exception
        }
        public async void PollJobAsync_NullJobId_ArgumentNullException()
        {
            IForceClient client = new ForceClient("test", "test", "v32");
            await client.PollJobAsync((string)null);

            // expects exception
        }
        public async void PollJobAsync_NullJobInfo_ArgumentNullException()
        {
            var client = new ForceClient("test", "test", "v32");
            await client.PollJobAsync((JobInfoResult)null);

            // expects exception
        }