public void TestCreateAndRetrieve()
{
const string carrier = "USPS";
const string trackingCode = "EZ1000000001";
var tracker = _client.CreateTracker(carrier, trackingCode).Result;
Assert.AreEqual(tracker.TrackingCode, trackingCode);
Assert.IsNotNull(tracker.EstDeliveryDate);
Assert.IsNotNull(tracker.Carrier);
Assert.IsNotNull(tracker.PublicUrl);
var t = _client.GetTracker(tracker.Id).Result;
Assert.AreEqual(t.Id, tracker.Id);
}