interop-testing: Add status_code_and_message interop test

interop-testing/src/main/java/io/grpc/testing/integration/AbstractInteropTest.java

@@ -78,6 +78,7 @@ import io.grpc.stub.MetadataUtils;
 import io.grpc.stub.StreamObserver;
 import io.grpc.testing.StreamRecorder;
 import io.grpc.testing.TestUtils;
+import io.grpc.testing.integration.Messages.EchoStatus;
 import io.grpc.testing.integration.Messages.Payload;
 import io.grpc.testing.integration.Messages.PayloadType;
 import io.grpc.testing.integration.Messages.ResponseParameters;
@@ -924,6 +925,52 @@ public abstract class AbstractInteropTest {
     }
   }
 
+  @Test(timeout = 10000)
+  public void statusCodeAndMessage() throws Exception {
+    int errorCode = 2;
+    String errorMessage = "test status message";
+    EchoStatus responseStatus = EchoStatus.newBuilder()
+        .setCode(errorCode)
+        .setMessage(errorMessage)
+        .build();
+    SimpleRequest simpleRequest = SimpleRequest.newBuilder()
+        .setResponseStatus(responseStatus)
+        .build();
+    StreamingOutputCallRequest streamingRequest = StreamingOutputCallRequest.newBuilder()
+        .setResponseStatus(responseStatus)
+        .build();
+
+    // Test UnaryCall
+    try {
+      blockingStub.unaryCall(simpleRequest);
+      fail();
+    } catch (StatusRuntimeException e) {
+      assertEquals(Status.UNKNOWN.getCode(), e.getStatus().getCode());
+      assertEquals(errorMessage, e.getStatus().getDescription());
+    }
+    if (metricsExpected()) {
+      assertClientMetrics("grpc.testing.TestService/UnaryCall", Status.Code.UNKNOWN);
+    }
+
+    // Test FullDuplexCall
+    @SuppressWarnings("unchecked")
+    StreamObserver<StreamingOutputCallResponse> responseObserver =
+        (StreamObserver<StreamingOutputCallResponse>) mock(StreamObserver.class);
+    StreamObserver<StreamingOutputCallRequest> requestObserver
+        = asyncStub.fullDuplexCall(responseObserver);
+    requestObserver.onNext(streamingRequest);
+    requestObserver.onCompleted();
+
+    ArgumentCaptor<Throwable> captor = ArgumentCaptor.forClass(Throwable.class);
+    verify(responseObserver, timeout(operationTimeoutMillis())).onError(captor.capture());
+    assertEquals(Status.UNKNOWN.getCode(), Status.fromThrowable(captor.getValue()).getCode());
+    assertEquals(errorMessage, Status.fromThrowable(captor.getValue()).getDescription());
+    verifyNoMoreInteractions(responseObserver);
+    if (metricsExpected()) {
+      assertClientMetrics("grpc.testing.TestService/FullDuplexCall", Status.Code.UNKNOWN);
+    }
+  }
+
   /** Sends an rpc to an unimplemented method within TestService. */
   @Test(timeout = 10000)
   public void unimplementedMethod() {

interop-testing/src/main/java/io/grpc/testing/integration/TestCases.java

@@ -49,6 +49,7 @@ public enum TestCases {
   OAUTH2_AUTH_TOKEN("raw oauth2 access token auth"),
   PER_RPC_CREDS("per rpc raw oauth2 access token auth"),
   CUSTOM_METADATA("unary and full duplex calls with metadata"),
+  STATUS_CODE_AND_MESSAGE("request error code and message"),
   UNIMPLEMENTED_METHOD("call an unimplemented RPC method"),
   UNIMPLEMENTED_SERVICE("call an unimplemented RPC service"),
   CANCEL_AFTER_BEGIN("cancel stream after starting it"),

interop-testing/src/main/java/io/grpc/testing/integration/TestServiceClient.java

@@ -268,6 +268,11 @@ public class TestServiceClient {
         break;
       }
 
+      case STATUS_CODE_AND_MESSAGE: {
+        tester.statusCodeAndMessage();
+        break;
+      }
+
       case UNIMPLEMENTED_METHOD: {
         tester.unimplementedMethod();
         break;

interop-testing/src/main/java/io/grpc/testing/integration/TestServiceImpl.java

@@ -31,6 +31,7 @@
 
 package io.grpc.testing.integration;
 
+import com.google.common.base.Preconditions;
 import com.google.common.collect.Queues;
 import com.google.protobuf.ByteString;
 import com.google.protobuf.EmptyProtos;
@@ -55,6 +56,7 @@ import java.util.Queue;
 import java.util.Random;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
+import javax.annotation.concurrent.GuardedBy;
 
 /**
  * Implementation of the business logic for the TestService. Uses an executor to schedule chunks
@@ -131,6 +133,14 @@ public class TestServiceImpl extends TestServiceGrpc.TestServiceImplBase {
           .setType(compressable ? PayloadType.COMPRESSABLE : PayloadType.UNCOMPRESSABLE)
           .setBody(payload);
     }
+
+    if (req.hasResponseStatus()) {
+      obs.onError(Status.fromCodeValue(req.getResponseStatus().getCode())
+          .withDescription(req.getResponseStatus().getMessage())
+          .asRuntimeException());
+      return;
+    }
+
     responseObserver.onNext(responseBuilder.build());
     responseObserver.onCompleted();
   }
@@ -186,13 +196,22 @@ public class TestServiceImpl extends TestServiceGrpc.TestServiceImplBase {
     return new StreamObserver<StreamingOutputCallRequest>() {
       @Override
       public void onNext(StreamingOutputCallRequest request) {
+        if (request.hasResponseStatus()) {
+          dispatcher.cancel();
+          responseObserver.onError(Status.fromCodeValue(request.getResponseStatus().getCode())
+              .withDescription(request.getResponseStatus().getMessage())
+              .asRuntimeException());
+          return;
+        }
         dispatcher.enqueue(toChunkQueue(request));
       }
 
       @Override
       public void onCompleted() {
-        // Tell the dispatcher that all input has been received.
+        if (!dispatcher.isCancelled()) {
-        dispatcher.completeInput();
+          // Tell the dispatcher that all input has been received.
+          dispatcher.completeInput();
+        }
       }
 
       @Override
@@ -239,6 +258,7 @@ public class TestServiceImpl extends TestServiceGrpc.TestServiceImplBase {
     private final Queue<Chunk> chunks;
     private final StreamObserver<StreamingOutputCallResponse> responseStream;
     private boolean scheduled;
+    @GuardedBy("this") private boolean cancelled;
     private Throwable failure;
     private Runnable dispatchTask = new Runnable() {
       @Override
@@ -295,11 +315,27 @@ public class TestServiceImpl extends TestServiceGrpc.TestServiceImplBase {
       return this;
     }
 
+    /**
+     * Allows the service to cancel the remaining responses.
+     */
+    public synchronized void cancel() {
+      Preconditions.checkState(!cancelled, "Dispatcher already cancelled");
+      chunks.clear();
+      cancelled = true;
+    }
+
+    public synchronized boolean isCancelled() {
+      return cancelled;
+    }
+
     /**
      * Dispatches the current response chunk to the client. This is only called by the executor. At
      * any time, a given dispatch task should only be registered with the executor once.
      */
     private synchronized void dispatchChunk() {
+      if (cancelled) {
+        return;
+      }
       try {
         // Pop off the next chunk and send it to the client.
         Chunk chunk = chunks.remove();

interop-testing/src/test/java/io/grpc/testing/integration/TestCasesTest.java

@@ -58,8 +58,8 @@ public class TestCasesTest {
     String[] testCases = {"empty_unary", "large_unary", "client_streaming", "server_streaming",
       "ping_pong", "empty_stream", "compute_engine_creds", "service_account_creds",
       "jwt_token_creds", "oauth2_auth_token", "per_rpc_creds", "custom_metadata",
-      "unimplemented_method", "unimplemented_service", "cancel_after_begin",
+      "status_code_and_message", "unimplemented_method", "unimplemented_service",
-      "cancel_after_first_response", "timeout_on_sleeping_server"};
+      "cancel_after_begin", "cancel_after_first_response", "timeout_on_sleeping_server"};
 
     assertEquals(testCases.length, TestCases.values().length);