tests: Streamline testing for LRO

- Disable testing of snippets rather than having all the files with "test disabled"
- Remove the build test (which would require us to have snippet csproj files)
- Move the fakes out of the folder where we expect generated code to live
- Test against the full generated file instead of just small parts of it

Author: jskeet

Google.Api.Generator.Tests/ProtoTest.cs

@@ -251,7 +251,7 @@ void CleanUp(string path)
         public void Paginated0() => ProtoTestSingle("Paginated", ignoreCsProj: true);
 
         [Fact]
-        public void Lro0() => ProtoTestSingle("Lro");
+        public void Lro0() => ProtoTestSingle("Lro", ignoreSnippets: true);
 
         [Fact]
         public void ServerStreaming0() => ProtoTestSingle("ServerStreaming", ignoreCsProj: true, ignoreSnippets: true);
@@ -365,9 +365,6 @@ public void PublishingSettings() => ProtoTestSingle(
         [Fact]
         public void BuildBasic() => BuildTest("Basic", protoPackageVersion: "v1");
 
-        [Fact]
-        public void BuildLro() => BuildTest("Lro");
-
         [Fact]
         public void DuplicateResourceDefinitions()
         {

Google.Api.Generator.Tests/ProtoTests/Lro/Lro.proto

@@ -6,6 +6,7 @@ import "google/api/resource.proto";
 
 package testing.lro;
 
+// LRO service to test.
 service Lro {
   option (google.api.default_host) = "lro.example.com";
 

Google.Api.Generator.Tests/ProtoTests/Lro/LroFakes.cs

@@ -0,0 +1,66 @@
+// Copyright 2019 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using Google.LongRunning;
+using Google.Protobuf.Reflection;
+using Grpc.Core;
+using System;
+
+// Disable warning: Missing XML comment on public members.
+// Required to successfully build this generated test project.
+#pragma warning disable 1591
+
+namespace Testing.Lro;
+
+// gRPC fakes
+public static partial class Lro
+{
+    public static ServiceDescriptor Descriptor => null;
+    public partial class LroClient
+    {
+        private CallInvoker CallInvoker => throw new NotImplementedException();
+
+        public LroClient(CallInvoker callInvoker) { }
+        public virtual AsyncUnaryCall<Operation> SignatureMethodAsync(Request request, CallOptions options) => throw new NotImplementedException();
+        public virtual Operation SignatureMethod(Request request, CallOptions options) => throw new NotImplementedException();
+        public virtual AsyncUnaryCall<Operation> ResourcedMethodAsync(ResourceRequest request, CallOptions options) => throw new NotImplementedException();
+        public virtual Operation ResourcedMethod(ResourceRequest request, CallOptions options) => throw new NotImplementedException();
+    }
+}
+
+// Protobuf fakes
+public class Request : ProtoMsgFake<Request>
+{
+    public string Name { get; set; }
+}
+
+public partial class ResourceRequest : ProtoMsgFake<ResourceRequest>
+{
+    public string Name { get; set; }
+}
+
+public class LroResponse : ProtoMsgFake<LroResponse> {
+    public class Types
+    {
+        public class Nested : ProtoMsgFake<Nested> { }
+    }
+}
+
+public class LroMetadata : ProtoMsgFake<LroMetadata>
+{
+    public class Types
+    {
+        public class Nested : ProtoMsgFake<Nested> { }
+    }
+}