public void Service_IsActive_property()
        {
            var file = "../../../Stocks.Service/companyData.json";
              var configurationService = new ConfigurationService(file);
              using (var webClientShim = new WebClientShim(new WebClient()))
              {

            var service = new StocksService(
              configurationService,
              webClientShim);

            Assert.Equal(false, service.IsActive);

            using (var task = Task.Factory.StartNew(() =>
              {
            service.Start();
            Assert.Equal(true, service.IsActive);

            using (var task2 = Task.Factory.StartNew(() => Thread.Sleep(50)))
            { task2.Wait(); }
            service.Stop();
            Assert.Equal(false, service.IsActive);
              }))
            {
              task.Wait();
            }
              }
        }