Add refund function in insurance service

CHANGELOG.md

@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## Next release
+
+- Add Refund function in insurance service for requesting a refund for standalone insurance.
+
 ## v6.2.1 (2024-03-18)
 
 - Fix serialization bug for carrier accounts parameter on `RetrieveStatelessRates` parameter set

EasyPost.Tests/ServicesTests/InsuranceServiceTest.cs

@@ -102,6 +102,25 @@ public async Task TestRetrieve()
             Assert.Equal(insurance.Id, retrievedInsurance.Id);
         }
 
+        [Fact]
+        [CrudOperations.Create]
+        [Testing.Function]
+        public async Task TestRefund()
+        {
+            UseVCR("refund");
+
+            Dictionary<string, object> parameters = Fixtures.BasicInsurance;
+            parameters.Add("tracking_code", "EZ1000000001");
+
+            Insurance insurance = await Client.Insurance.Create(parameters);
+            Insurance cancelledInsurance = await Client.Insurance.Refund(insurance.Id);
+
+            Assert.IsType<Insurance>(insurance);
+            Assert.StartsWith("ins_", cancelledInsurance.Id);
+            Assert.Equal("cancelled", cancelledInsurance.Status);
+            Assert.Equal("Insurance was cancelled by the user.", cancelledInsurance.Messages[0]);
+        }
+
         #endregion
 
         #endregion