tests: Add in a EchoCustomError for custom failure details for Rest and Grpc

Author: purvavasudeo

Google.Api.Generator.IntegrationTests/EchoTest.cs

@@ -18,6 +18,8 @@
 using System.Linq;
 using System.Threading.Tasks;
 using Xunit;
+using System;
+using Google.Api.Gax.Grpc;
 
 namespace Google.Api.Generator.IntegrationTests
 {
@@ -36,29 +38,55 @@ public void SimpleEcho()
         public void EchoError()
         {
             var client = CreateClient();
-            var request = new EchoRequest { Error = new Rpc.Status { Code = (int) Code.Cancelled } };
+            var request = new EchoRequest { Error = new Rpc.Status { Code = (int)Code.Cancelled } };
             var exception = Assert.Throws<RpcException>(() => client.Echo(request));
-            Assert.Equal(request.Error.Code, (int) exception.Status.StatusCode);
+            Assert.Equal(request.Error.Code, (int)exception.Status.StatusCode);
         }
 
-        // Note: header testing is currently at least tricky. (It may be feasible for a gRPC interceptor.)
-        // We'll defer that for now; perhaps in a future version of the server it could check the expected
-        // header values.
+        [SkippableFact]
+        protected void EchoCustomError()
+        {
+            var client = CreateClient();
+            var request = new FailEchoWithDetailsRequest();
+            RpcException e = Assert.Throws<RpcException>(() => client.FailEchoWithDetails(request));
+            Console.WriteLine(e);
+
+            // Assertions for meaningful data inside the exception
+            var rpcStatusDetails = e.GetRpcStatus();
+            Console.WriteLine($"Rpc Details: {rpcStatusDetails}");
+            Assert.NotNull(rpcStatusDetails);
+            Assert.Equal((int)Grpc.Core.StatusCode.Aborted, rpcStatusDetails.Code);
+            Assert.Equal("This is an error generated by the server", rpcStatusDetails.Message);
 
-        public class EchoRestTest : EchoTestBase { }
 
-        public class EchoGrpcTest : EchoTestBase
+            // Assertions for localized message
+            var localizedMessage = e.GetLocalizedMessage();
+            Assert.Equal("fr-CH", localizedMessage.Locale);
+            Assert.Equal("This LocalizedMessage should be treated specially", localizedMessage.Message);
+
+            // Asserts for the custom error (PoetryError)
+            // This currently fails for Rest
+            Assert.NotNull(e.GetStatusDetail<PoetryError>());
+        }
+    }
+
+    // Note: header testing is currently at least tricky. (It may be feasible for a gRPC interceptor.)
+    // We'll defer that for now; perhaps in a future version of the server it could check the expected
+    // header values.
+    public class EchoRestTest : EchoTestBase { }
+
+    public class EchoGrpcTest : EchoTestBase
+    {
+        // Note: currently only for gRPC as we don't support streaming methods in REST yet.
+        [SkippableFact]
+        public async Task Expand()
         {
-            // Note: currently only for gRPC as we don't support streaming methods in REST yet.
-            [SkippableFact]
-            public async Task Expand()
-            {
-                string content = "The rain in Spain stays mainly on the plain!";
-                var client = CreateClient();
-                var stream = client.Expand(new ExpandRequest { Content = content });
-                var items = await stream.GetResponseStream().Select(resp => resp.Content).ToListAsync();
-                Assert.Equal(content, string.Join(" ", items));
-            }
+            string content = "The rain in Spain stays mainly on the plain!";
+            var client = CreateClient();
+            var stream = client.Expand(new ExpandRequest { Content = content });
+            var items = await stream.GetResponseStream().Select(resp => resp.Content).ToListAsync();
+            Assert.Equal(content, string.Join(" ", items));
         }
     }
+
 }