fix warnings in integration tests

src/csharp/Grpc.IntegrationTesting.Client/Grpc.IntegrationTesting.Client.csproj

@@ -10,6 +10,7 @@
     <PackageId>Grpc.IntegrationTesting.Client</PackageId>
     <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
     <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
   <ItemGroup>

src/csharp/Grpc.IntegrationTesting.QpsWorker/Grpc.IntegrationTesting.QpsWorker.csproj

@@ -11,6 +11,7 @@
     <ServerGarbageCollection>true</ServerGarbageCollection>
     <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
     <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
   <ItemGroup>

src/csharp/Grpc.IntegrationTesting.Server/Grpc.IntegrationTesting.Server.csproj

@@ -10,6 +10,7 @@
     <PackageId>Grpc.IntegrationTesting.Server</PackageId>
     <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
     <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
   <ItemGroup>

src/csharp/Grpc.IntegrationTesting.StressClient/Grpc.IntegrationTesting.StressClient.csproj

@@ -10,6 +10,7 @@
     <PackageId>Grpc.IntegrationTesting.StressClient</PackageId>
     <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
     <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
   <ItemGroup>

src/csharp/Grpc.IntegrationTesting/CustomErrorDetailsTest.cs

@@ -42,7 +42,7 @@ namespace Grpc.IntegrationTesting
         Channel channel;
         TestService.TestServiceClient client;
 
-        [TestFixtureSetUp]
+        [OneTimeSetUp]
         public void Init()
         {
             // Disable SO_REUSEPORT to prevent https://github.com/grpc/grpc/issues/10755
@@ -57,7 +57,7 @@ namespace Grpc.IntegrationTesting
             client = new TestService.TestServiceClient(channel);
         }
 
-        [TestFixtureTearDown]
+        [OneTimeTearDown]
         public void Cleanup()
         {
             channel.ShutdownAsync().Wait();
@@ -108,7 +108,7 @@ namespace Grpc.IntegrationTesting
 
         private class CustomErrorDetailsTestServiceImpl : TestService.TestServiceBase
         {
-            public override async Task<SimpleResponse> UnaryCall(SimpleRequest request, ServerCallContext context)
+            public override Task<SimpleResponse> UnaryCall(SimpleRequest request, ServerCallContext context)
             {
                 try
                 {

src/csharp/Grpc.IntegrationTesting/GeneratedServiceBaseTest.cs

@@ -65,7 +65,7 @@ namespace Grpc.IntegrationTesting
         }
 
         [Test]
-        public async Task UnimplementedByDefault_ClientStreaming()
+        public void UnimplementedByDefault_ClientStreaming()
         {
             var call = client.StreamingInputCall();
 
@@ -74,7 +74,7 @@ namespace Grpc.IntegrationTesting
         }
 
         [Test]
-        public async Task UnimplementedByDefault_ServerStreamingCall()
+        public void UnimplementedByDefault_ServerStreamingCall()
         {
             var call = client.StreamingOutputCall(new StreamingOutputCallRequest());
 
@@ -83,7 +83,7 @@ namespace Grpc.IntegrationTesting
         }
 
         [Test]
-        public async Task UnimplementedByDefault_DuplexStreamingCall()
+        public void UnimplementedByDefault_DuplexStreamingCall()
         {
             var call = client.FullDuplexCall();
 

src/csharp/Grpc.IntegrationTesting/Grpc.IntegrationTesting.csproj

@@ -10,6 +10,7 @@
     <PackageId>Grpc.IntegrationTesting</PackageId>
     <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);portable-net45</PackageTargetFallback>
     <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
   <ItemGroup>

src/csharp/Grpc.IntegrationTesting/InteropClientServerTest.cs

@@ -38,7 +38,7 @@ namespace Grpc.IntegrationTesting
         Channel channel;
         TestService.TestServiceClient client;
 
-        [TestFixtureSetUp]
+        [OneTimeSetUp]
         public void Init()
         {
             // Disable SO_REUSEPORT to prevent https://github.com/grpc/grpc/issues/10755
@@ -58,7 +58,7 @@ namespace Grpc.IntegrationTesting
             client = new TestService.TestServiceClient(channel);
         }
 
-        [TestFixtureTearDown]
+        [OneTimeTearDown]
         public void Cleanup()
         {
             channel.ShutdownAsync().Wait();

src/csharp/Grpc.IntegrationTesting/RunnerClientServerTest.cs

@@ -35,7 +35,7 @@ namespace Grpc.IntegrationTesting
     {
         IServerRunner serverRunner;
 
-        [TestFixtureSetUp]
+        [OneTimeSetUp]
         public void Init()
         {
             var serverConfig = new ServerConfig
@@ -45,7 +45,7 @@ namespace Grpc.IntegrationTesting
             serverRunner = ServerRunners.CreateStarted(serverConfig);
         }
 
-        [TestFixtureTearDown]
+        [OneTimeTearDown]
         public void Cleanup()
         {
             serverRunner.StopAsync().Wait();

src/csharp/Grpc.IntegrationTesting/SslCredentialsTest.cs

@@ -41,7 +41,7 @@ namespace Grpc.IntegrationTesting
         Channel channel;
         TestService.TestServiceClient client;
 
-        [TestFixtureSetUp]
+        [OneTimeSetUp]
         public void Init()
         {
             var rootCert = File.ReadAllText(TestCredentials.ClientCertAuthorityPath);
@@ -69,7 +69,7 @@ namespace Grpc.IntegrationTesting
             client = new TestService.TestServiceClient(channel);
         }
 
-        [TestFixtureTearDown]
+        [OneTimeTearDown]
         public void Cleanup()
         {
             channel.ShutdownAsync().Wait();
@@ -94,15 +94,15 @@ namespace Grpc.IntegrationTesting
 
         private class SslCredentialsTestServiceImpl : TestService.TestServiceBase
         {
-            public override async Task<SimpleResponse> UnaryCall(SimpleRequest request, ServerCallContext context)
+            public override Task<SimpleResponse> UnaryCall(SimpleRequest request, ServerCallContext context)
             {
-                return new SimpleResponse { Payload = CreateZerosPayload(request.ResponseSize) };
+                return Task.FromResult(new SimpleResponse { Payload = CreateZerosPayload(request.ResponseSize) });
             }
 
             public override async Task<StreamingInputCallResponse> StreamingInputCall(IAsyncStreamReader<StreamingInputCallRequest> requestStream, ServerCallContext context)
             {
                 var authContext = context.AuthContext;
-                await requestStream.ForEachAsync(async request => {});
+                await requestStream.ForEachAsync(request => TaskUtils.CompletedTask);
 
                 Assert.IsTrue(authContext.IsPeerAuthenticated);
                 Assert.AreEqual("x509_subject_alternative_name", authContext.PeerIdentityPropertyName);

src/csharp/Grpc.IntegrationTesting/TestServiceImpl.cs

@@ -63,9 +63,10 @@ namespace Grpc.Testing
             await EnsureEchoMetadataAsync(context);
 
             int sum = 0;
-            await requestStream.ForEachAsync(async request =>
+            await requestStream.ForEachAsync(request =>
             {
                 sum += request.Payload.Body.Length;
+                return TaskUtils.CompletedTask;
             });
             return new StreamingInputCallResponse { AggregatedPayloadSize = sum };
         }
@@ -85,7 +86,7 @@ namespace Grpc.Testing
             });
         }
 
-        public override async Task HalfDuplexCall(IAsyncStreamReader<StreamingOutputCallRequest> requestStream, IServerStreamWriter<StreamingOutputCallResponse> responseStream, ServerCallContext context)
+        public override Task HalfDuplexCall(IAsyncStreamReader<StreamingOutputCallRequest> requestStream, IServerStreamWriter<StreamingOutputCallResponse> responseStream, ServerCallContext context)
         {
             throw new NotImplementedException();
         }