Delivery date (#452)

- Add new models for smart rates with estimated delivery dates
- Add function to retrieve estimated delivery date using date parameter
- Add function to retrieve estimated delivery date using Parameters object
- Add new GetEstimatedDeliveryDate parameters object
- Add unit tests for getting estimated delivery date for a shipment
- Add cassettes, fixture data
- Change base class for TimeInTransit since it is ephemeral

EasyPost.Tests/BetaFeaturesTests/ServicesTests/ShipmentServiceTest.cs

@@ -367,6 +367,27 @@ public async Task TestRegenerateRatesWithCarbonOffset()
             Assert.NotNull(newRateWithCarbon.CarbonOffset);
         }
 
+        [Fact]
+        [Testing.Function]
+        public async Task TestRetrieveEstimatedDeliveryDates()
+        {
+            UseVCR("estimated_delivery_dates");
+
+            Shipment shipment = await Client.Shipment.Create(Fixtures.Parameters.Shipments.Create(Fixtures.BasicShipment));
+
+            BetaFeatures.Parameters.Shipments.RetrieveEstimatedDeliveryDate retrieveEstimatedDeliveryDatesParameters = new BetaFeatures.Parameters.Shipments.RetrieveEstimatedDeliveryDate
+            {
+                PlannedShipDate = Fixtures.PlannedShipDate,
+            };
+
+            List<RateWithEstimatedDeliveryDate> ratesWithEstimatedDeliveryDates = await Client.Shipment.RetrieveEstimatedDeliveryDate(shipment.Id, retrieveEstimatedDeliveryDatesParameters);
+
+            foreach (var rate in ratesWithEstimatedDeliveryDates)
+            {
+                Assert.NotNull(rate.EasyPostTimeInTransitData);
+            }
+        }
+
         #endregion
 
         #endregion

EasyPost.Tests/Fixture.cs

@@ -89,6 +89,8 @@ public static byte[] EventBody
 
         internal static string PickupService => GetFixtureStructure().ServiceNames.Usps.PickupService;
 
+        internal static string PlannedShipDate => "2023-05-02";
+
         internal static Dictionary<string, object> ReferralCustomer => GetFixtureStructure().Users.Referral;
 
         internal static string ReportDate => "2022-04-12";

EasyPost.Tests/ServicesTests/ShipmentServiceTest.cs

@@ -560,6 +560,22 @@ public async Task TestForms()
             }
         }
 
+        [Fact]
+        [Testing.Function]
+        public async Task TestRetrieveEstimatedDeliveryDates()
+        {
+            UseVCR("estimated_delivery_dates");
+
+            Shipment shipment = await Client.Shipment.Create(Fixtures.BasicShipment);
+
+            List<RateWithEstimatedDeliveryDate> ratesWithEstimatedDeliveryDates = await Client.Shipment.RetrieveEstimatedDeliveryDate(shipment.Id, Fixtures.PlannedShipDate);
+
+            foreach (var rate in ratesWithEstimatedDeliveryDates)
+            {
+                Assert.NotNull(rate.EasyPostTimeInTransitData);
+            }
+        }
+
         #endregion
 
         #endregion