[gRPC/iOS] Moving remote interop test from to interop test suite (#29808)

src/objective-c/tests/Common/GRPCBlockCallbackResponseHandler.h

@@ -0,0 +1,34 @@
+/*
+ *
+ * Copyright 2019 gRPC authors.
+ *
+ * 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
+ *
+ *     http://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.
+ *
+ */
+
+#import <Foundation/Foundation.h>
+#import <GRPCClient/GRPCCall.h>
+
+// Convenience class to use blocks as callbacks
+@interface GRPCBlockCallbackResponseHandler : NSObject <GRPCResponseHandler>
+
+- (instancetype)initWithInitialMetadataCallback:(void (^)(NSDictionary *))initialMetadataCallback
+                                messageCallback:(void (^)(id))messageCallback
+                                  closeCallback:(void (^)(NSDictionary *, NSError *))closeCallback
+                              writeDataCallback:(void (^)(void))writeDataCallback;
+
+- (instancetype)initWithInitialMetadataCallback:(void (^)(NSDictionary *))initialMetadataCallback
+                                messageCallback:(void (^)(id))messageCallback
+                                  closeCallback:(void (^)(NSDictionary *, NSError *))closeCallback;
+
+@end

src/objective-c/tests/Common/GRPCBlockCallbackResponseHandler.m

@@ -0,0 +1,78 @@
+/**
+ * Copyright 2022 gRPC authors.
+ *
+ * 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
+ *
+ *     http://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.
+ */
+
+#import "GRPCBlockCallbackResponseHandler.h"
+
+@implementation GRPCBlockCallbackResponseHandler {
+  void (^_initialMetadataCallback)(NSDictionary *);
+  void (^_messageCallback)(id);
+  void (^_closeCallback)(NSDictionary *, NSError *);
+  void (^_writeDataCallback)(void);
+  dispatch_queue_t _dispatchQueue;
+}
+
+- (instancetype)initWithInitialMetadataCallback:(void (^)(NSDictionary *))initialMetadataCallback
+                                messageCallback:(void (^)(id))messageCallback
+                                  closeCallback:(void (^)(NSDictionary *, NSError *))closeCallback
+                              writeDataCallback:(void (^)(void))writeDataCallback {
+  if ((self = [super init])) {
+    _initialMetadataCallback = initialMetadataCallback;
+    _messageCallback = messageCallback;
+    _closeCallback = closeCallback;
+    _writeDataCallback = writeDataCallback;
+    _dispatchQueue = dispatch_queue_create(nil, DISPATCH_QUEUE_SERIAL);
+  }
+  return self;
+}
+
+- (instancetype)initWithInitialMetadataCallback:(void (^)(NSDictionary *))initialMetadataCallback
+                                messageCallback:(void (^)(id))messageCallback
+                                  closeCallback:(void (^)(NSDictionary *, NSError *))closeCallback {
+  return [self initWithInitialMetadataCallback:initialMetadataCallback
+                               messageCallback:messageCallback
+                                 closeCallback:closeCallback
+                             writeDataCallback:nil];
+}
+
+- (void)didReceiveInitialMetadata:(NSDictionary *)initialMetadata {
+  if (self->_initialMetadataCallback) {
+    self->_initialMetadataCallback(initialMetadata);
+  }
+}
+
+- (void)didReceiveRawMessage:(id)message {
+  if (self->_messageCallback) {
+    self->_messageCallback(message);
+  }
+}
+
+- (void)didCloseWithTrailingMetadata:(NSDictionary *)trailingMetadata error:(NSError *)error {
+  if (self->_closeCallback) {
+    self->_closeCallback(trailingMetadata, error);
+  }
+}
+
+- (void)didWriteData {
+  if (self->_writeDataCallback) {
+    self->_writeDataCallback();
+  }
+}
+
+- (dispatch_queue_t)dispatchQueue {
+  return _dispatchQueue;
+}
+
+@end

src/objective-c/tests/InteropTests/InteropTestsRemote.m

@@ -17,10 +17,22 @@
  */
 
 #import <GRPCClient/GRPCCall+Tests.h>
+#import <GRPCClient/GRPCCall.h>
 #import <GRPCClient/internal_testing/GRPCCall+InternalTests.h>
+#import <RxLibrary/GRXWriter+Immediate.h>
+
+#import "../Common/GRPCBlockCallbackResponseHandler.h"
+
+#import "src/objective-c/tests/RemoteTestClient/Messages.pbobjc.h"
+#import "src/objective-c/tests/RemoteTestClient/Test.pbobjc.h"
+#import "src/objective-c/tests/RemoteTestClient/Test.pbrpc.h"
 
 #import "InteropTests.h"
 
+// Package and service name of test server
+static NSString *const kPackage = @"grpc.testing";
+static NSString *const kService = @"TestService";
+
 // The server address is derived from preprocessor macro, which is
 // in turn derived from environment variable of the same name.
 #define NSStringize_helper(x) #x
@@ -31,12 +43,18 @@ static NSString *const kRemoteSSLHost = NSStringize(HOST_PORT_REMOTE);
 // by experiment. Adjust this when server's proto file changes.
 static int32_t kRemoteInteropServerOverhead = 12;
 
+static const NSTimeInterval kTestTimeout = 8;
+
+static GRPCProtoMethod *kUnaryCallMethod;
+
 /** Tests in InteropTests.m, sending the RPCs to a remote SSL server. */
 @interface InteropTestsRemote : InteropTests
 @end
 
 @implementation InteropTestsRemote
 
+#pragma mark - InteropTests
+
 + (NSString *)host {
   return kRemoteSSLHost;
 }
@@ -61,4 +79,135 @@ static int32_t kRemoteInteropServerOverhead = 12;
   return YES;
 }
 
+#pragma mark - InteropTestsRemote tests
+
+- (void)setUp {
+  [super setUp];
+
+  kUnaryCallMethod = [[GRPCProtoMethod alloc] initWithPackage:kPackage
+                                                      service:kService
+                                                       method:@"UnaryCall"];
+}
+
+- (void)testMetadataForV2Call {
+  XCTestExpectation *expectation = [self expectationWithDescription:@"RPC unauthorized."];
+
+  RMTSimpleRequest *request = [RMTSimpleRequest message];
+  request.fillUsername = YES;
+  request.fillOauthScope = YES;
+
+  GRPCRequestOptions *callRequest =
+      [[GRPCRequestOptions alloc] initWithHost:[[self class] host]
+                                          path:kUnaryCallMethod.HTTPPath
+                                        safety:GRPCCallSafetyDefault];
+  __block NSDictionary *init_md;
+  __block NSDictionary *trailing_md;
+  GRPCMutableCallOptions *options = [[GRPCMutableCallOptions alloc] init];
+  options.oauth2AccessToken = @"bogusToken";
+
+  GRPCCall2 *call = [[GRPCCall2 alloc]
+      initWithRequestOptions:callRequest
+             responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
+                                 initWithInitialMetadataCallback:^(NSDictionary *initialMetadata) {
+                                   init_md = initialMetadata;
+                                 }
+                                 messageCallback:^(id message) {
+                                   XCTFail(@"Received unexpected response.");
+                                 }
+                                 closeCallback:^(NSDictionary *trailingMetadata, NSError *error) {
+                                   trailing_md = trailingMetadata;
+                                   if (error) {
+                                     XCTAssertEqual(error.code, 16,
+                                                    @"Finished with unexpected error: %@", error);
+                                     XCTAssertEqualObjects(init_md,
+                                                           error.userInfo[kGRPCHeadersKey]);
+                                     XCTAssertEqualObjects(trailing_md,
+                                                           error.userInfo[kGRPCTrailersKey]);
+                                     NSString *challengeHeader = init_md[@"www-authenticate"];
+                                     XCTAssertGreaterThan(challengeHeader.length, 0,
+                                                          @"No challenge in response headers %@",
+                                                          init_md);
+                                     [expectation fulfill];
+                                   }
+                                 }]
+                 callOptions:options];
+
+  [call start];
+  [call writeData:[request data]];
+  [call finish];
+
+  [self waitForExpectationsWithTimeout:kTestTimeout handler:nil];
+}
+
+- (void)testMetadataForV1Call {
+  XCTestExpectation *expectation = [self expectationWithDescription:@"RPC unauthorized."];
+
+  RMTSimpleRequest *request = [RMTSimpleRequest message];
+  request.fillUsername = YES;
+  request.fillOauthScope = YES;
+  GRXWriter *requestsWriter = [GRXWriter writerWithValue:[request data]];
+
+  GRPCCall *call = [[GRPCCall alloc] initWithHost:kRemoteSSLHost
+                                             path:kUnaryCallMethod.HTTPPath
+                                   requestsWriter:requestsWriter];
+
+  call.oauth2AccessToken = @"bogusToken";
+
+  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc]
+      initWithValueHandler:^(NSData *value) {
+        XCTFail(@"Received unexpected response: %@", value);
+      }
+      completionHandler:^(NSError *errorOrNil) {
+        XCTAssertNotNil(errorOrNil, @"Finished without error!");
+        XCTAssertEqual(errorOrNil.code, 16, @"Finished with unexpected error: %@", errorOrNil);
+        XCTAssertEqualObjects(call.responseHeaders, errorOrNil.userInfo[kGRPCHeadersKey],
+                              @"Headers in the NSError object and call object differ.");
+        XCTAssertEqualObjects(call.responseTrailers, errorOrNil.userInfo[kGRPCTrailersKey],
+                              @"Trailers in the NSError object and call object differ.");
+        NSString *challengeHeader = call.oauth2ChallengeHeader;
+        XCTAssertGreaterThan(challengeHeader.length, 0, @"No challenge in response headers %@",
+                             call.responseHeaders);
+        [expectation fulfill];
+      }];
+
+  [call startWithWriteable:responsesWriteable];
+
+  [self waitForExpectationsWithTimeout:kTestTimeout handler:nil];
+}
+
+- (void)testErrorDebugInformation {
+  XCTestExpectation *expectation = [self expectationWithDescription:@"RPC unauthorized."];
+
+  RMTSimpleRequest *request = [RMTSimpleRequest message];
+  request.fillUsername = YES;
+  request.fillOauthScope = YES;
+  GRXWriter *requestsWriter = [GRXWriter writerWithValue:[request data]];
+
+  GRPCCall *call = [[GRPCCall alloc] initWithHost:kRemoteSSLHost
+                                             path:kUnaryCallMethod.HTTPPath
+                                   requestsWriter:requestsWriter];
+
+  call.oauth2AccessToken = @"bogusToken";
+
+  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc]
+      initWithValueHandler:^(NSData *value) {
+        XCTFail(@"Received unexpected response: %@", value);
+      }
+      completionHandler:^(NSError *errorOrNil) {
+        XCTAssertNotNil(errorOrNil, @"Finished without error!");
+        NSDictionary *userInfo = errorOrNil.userInfo;
+        NSString *debugInformation = userInfo[NSDebugDescriptionErrorKey];
+        XCTAssertNotNil(debugInformation);
+        XCTAssertNotEqual([debugInformation length], 0);
+        NSString *challengeHeader = call.oauth2ChallengeHeader;
+        XCTAssertGreaterThan(challengeHeader.length, 0, @"No challenge in response headers %@",
+                             call.responseHeaders);
+        [expectation fulfill];
+      }];
+
+  [call startWithWriteable:responsesWriteable];
+
+  [self waitForExpectationsWithTimeout:kTestTimeout handler:nil];
+}
+
 @end

src/objective-c/tests/UnitTests/APIv2Tests.m

@@ -24,6 +24,7 @@
 #include <grpc/grpc.h>
 #include <grpc/support/port_platform.h>
 
+#import "../Common/GRPCBlockCallbackResponseHandler.h"
 #import "../Common/TestUtils.h"
 #import "../version.h"
 
@@ -50,81 +51,6 @@ static const NSTimeInterval kInvertedTimeout = 2;
 
 @end
 
-// Convenience class to use blocks as callbacks
-@interface ClientTestsBlockCallbacks : NSObject <GRPCResponseHandler>
-
-- (instancetype)initWithInitialMetadataCallback:(void (^)(NSDictionary *))initialMetadataCallback
-                                messageCallback:(void (^)(id))messageCallback
-                                  closeCallback:(void (^)(NSDictionary *, NSError *))closeCallback
-                              writeDataCallback:(void (^)(void))writeDataCallback;
-
-- (instancetype)initWithInitialMetadataCallback:(void (^)(NSDictionary *))initialMetadataCallback
-                                messageCallback:(void (^)(id))messageCallback
-                                  closeCallback:(void (^)(NSDictionary *, NSError *))closeCallback;
-
-@end
-
-@implementation ClientTestsBlockCallbacks {
-  void (^_initialMetadataCallback)(NSDictionary *);
-  void (^_messageCallback)(id);
-  void (^_closeCallback)(NSDictionary *, NSError *);
-  void (^_writeDataCallback)(void);
-  dispatch_queue_t _dispatchQueue;
-}
-
-- (instancetype)initWithInitialMetadataCallback:(void (^)(NSDictionary *))initialMetadataCallback
-                                messageCallback:(void (^)(id))messageCallback
-                                  closeCallback:(void (^)(NSDictionary *, NSError *))closeCallback
-                              writeDataCallback:(void (^)(void))writeDataCallback {
-  if ((self = [super init])) {
-    _initialMetadataCallback = initialMetadataCallback;
-    _messageCallback = messageCallback;
-    _closeCallback = closeCallback;
-    _writeDataCallback = writeDataCallback;
-    _dispatchQueue = dispatch_queue_create(nil, DISPATCH_QUEUE_SERIAL);
-  }
-  return self;
-}
-
-- (instancetype)initWithInitialMetadataCallback:(void (^)(NSDictionary *))initialMetadataCallback
-                                messageCallback:(void (^)(id))messageCallback
-                                  closeCallback:(void (^)(NSDictionary *, NSError *))closeCallback {
-  return [self initWithInitialMetadataCallback:initialMetadataCallback
-                               messageCallback:messageCallback
-                                 closeCallback:closeCallback
-                             writeDataCallback:nil];
-}
-
-- (void)didReceiveInitialMetadata:(NSDictionary *)initialMetadata {
-  if (self->_initialMetadataCallback) {
-    self->_initialMetadataCallback(initialMetadata);
-  }
-}
-
-- (void)didReceiveRawMessage:(GPBMessage *)message {
-  if (self->_messageCallback) {
-    self->_messageCallback(message);
-  }
-}
-
-- (void)didCloseWithTrailingMetadata:(NSDictionary *)trailingMetadata error:(NSError *)error {
-  if (self->_closeCallback) {
-    self->_closeCallback(trailingMetadata, error);
-  }
-}
-
-- (void)didWriteData {
-  if (self->_writeDataCallback) {
-    self->_writeDataCallback();
-  }
-}
-
-- (dispatch_queue_t)dispatchQueue {
-  return _dispatchQueue;
-}
-
-@end
-
 @interface CallAPIv2Tests : XCTestCase <GRPCAuthorizationProtocol>
 
 @end
@@ -154,55 +80,6 @@ static const NSTimeInterval kInvertedTimeout = 2;
                                                             method:@"FullDuplexCall"];
 }
 
-- (void)testMetadata {
-  __weak XCTestExpectation *expectation = [self expectationWithDescription:@"RPC unauthorized."];
-
-  RMTSimpleRequest *request = [RMTSimpleRequest message];
-  request.fillUsername = YES;
-  request.fillOauthScope = YES;
-
-  GRPCRequestOptions *callRequest =
-      [[GRPCRequestOptions alloc] initWithHost:GRPCGetRemoteInteropTestServerAddress()
-                                          path:kUnaryCallMethod.HTTPPath
-                                        safety:GRPCCallSafetyDefault];
-  __block NSDictionary *init_md;
-  __block NSDictionary *trailing_md;
-  GRPCMutableCallOptions *options = [[GRPCMutableCallOptions alloc] init];
-  options.oauth2AccessToken = @"bogusToken";
-  GRPCCall2 *call = [[GRPCCall2 alloc]
-      initWithRequestOptions:callRequest
-             responseHandler:[[ClientTestsBlockCallbacks alloc]
-                                 initWithInitialMetadataCallback:^(NSDictionary *initialMetadata) {
-                                   init_md = initialMetadata;
-                                 }
-                                 messageCallback:^(id message) {
-                                   XCTFail(@"Received unexpected response.");
-                                 }
-                                 closeCallback:^(NSDictionary *trailingMetadata, NSError *error) {
-                                   trailing_md = trailingMetadata;
-                                   if (error) {
-                                     XCTAssertEqual(error.code, 16,
-                                                    @"Finished with unexpected error: %@", error);
-                                     XCTAssertEqualObjects(init_md,
-                                                           error.userInfo[kGRPCHeadersKey]);
-                                     XCTAssertEqualObjects(trailing_md,
-                                                           error.userInfo[kGRPCTrailersKey]);
-                                     NSString *challengeHeader = init_md[@"www-authenticate"];
-                                     XCTAssertGreaterThan(challengeHeader.length, 0,
-                                                          @"No challenge in response headers %@",
-                                                          init_md);
-                                     [expectation fulfill];
-                                   }
-                                 }]
-                 callOptions:options];
-
-  [call start];
-  [call writeData:[request data]];
-  [call finish];
-
-  [self waitForExpectationsWithTimeout:kTestTimeout handler:nil];
-}
-
 - (void)testUserAgentPrefix {
   __weak XCTestExpectation *completion = [self expectationWithDescription:@"Empty RPC completed."];
   __weak XCTestExpectation *recvInitialMd =
@@ -221,7 +98,7 @@ static const NSTimeInterval kInvertedTimeout = 2;
   GRPCCall2 *call = [[GRPCCall2 alloc]
       initWithRequestOptions:request
              responseHandler:
-                 [[ClientTestsBlockCallbacks alloc]
+                 [[GRPCBlockCallbackResponseHandler alloc]
                      initWithInitialMetadataCallback:^(NSDictionary *initialMetadata) {
                        NSString *userAgent = initialMetadata[@"x-grpc-test-echo-useragent"];
                        // Test the regex is correct
@@ -293,7 +170,7 @@ static const NSTimeInterval kInvertedTimeout = 2;
   options.authTokenProvider = self;
   __block GRPCCall2 *call = [[GRPCCall2 alloc]
       initWithRequestOptions:requestOptions
-             responseHandler:[[ClientTestsBlockCallbacks alloc]
+             responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
                                  initWithInitialMetadataCallback:nil
                                                  messageCallback:nil
                                                    closeCallback:^(NSDictionary *trailingMetadata,
@@ -325,7 +202,7 @@ static const NSTimeInterval kInvertedTimeout = 2;
 
   GRPCCall2 *call = [[GRPCCall2 alloc]
       initWithRequestOptions:requestOptions
-             responseHandler:[[ClientTestsBlockCallbacks alloc]
+             responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
                                  initWithInitialMetadataCallback:nil
                                                  messageCallback:nil
                                                    closeCallback:^(NSDictionary *trailingMetadata,
@@ -358,7 +235,7 @@ static const NSTimeInterval kInvertedTimeout = 2;
   GRPCCall2 *call = [[GRPCCall2 alloc]
       initWithRequestOptions:requestOptions
              responseHandler:
-                 [[ClientTestsBlockCallbacks alloc] initWithInitialMetadataCallback:nil
+                 [[GRPCBlockCallbackResponseHandler alloc] initWithInitialMetadataCallback:nil
                      messageCallback:^(NSData *data) {
                        XCTFail(@"Failure: response received; Expect: no response received.");
                      }
@@ -396,7 +273,8 @@ static const NSTimeInterval kInvertedTimeout = 2;
   NSDate *startTime = [NSDate date];
   GRPCCall2 *call = [[GRPCCall2 alloc]
       initWithRequestOptions:requestOptions
-             responseHandler:[[ClientTestsBlockCallbacks alloc] initWithInitialMetadataCallback:nil
+             responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
+                                 initWithInitialMetadataCallback:nil
                                  messageCallback:^(NSData *data) {
                                    XCTFail(@"Received message. Should not reach here.");
                                  }
@@ -443,7 +321,8 @@ static const NSTimeInterval kInvertedTimeout = 2;
   options.compressionAlgorithm = GRPCCompressGzip;
   GRPCCall2 *call = [[GRPCCall2 alloc]
       initWithRequestOptions:requestOptions
-             responseHandler:[[ClientTestsBlockCallbacks alloc] initWithInitialMetadataCallback:nil
+             responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
+                                 initWithInitialMetadataCallback:nil
                                  messageCallback:^(NSData *data) {
                                    NSError *error;
                                    RMTSimpleResponse *response =
@@ -484,7 +363,7 @@ static const NSTimeInterval kInvertedTimeout = 2;
   options.flowControlEnabled = YES;
   GRPCCall2 *call =
       [[GRPCCall2 alloc] initWithRequestOptions:callRequest
-                                responseHandler:[[ClientTestsBlockCallbacks alloc]
+                                responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
                                                     initWithInitialMetadataCallback:nil
                                                                     messageCallback:nil
                                                                       closeCallback:nil
@@ -527,7 +406,8 @@ static const NSTimeInterval kInvertedTimeout = 2;
   __block int unblocked = NO;
   GRPCCall2 *call = [[GRPCCall2 alloc]
       initWithRequestOptions:callRequest
-             responseHandler:[[ClientTestsBlockCallbacks alloc] initWithInitialMetadataCallback:nil
+             responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
+                                 initWithInitialMetadataCallback:nil
                                  messageCallback:^(NSData *message) {
                                    if (!unblocked) {
                                      [expectBlockedMessage fulfill];
@@ -586,22 +466,23 @@ static const NSTimeInterval kInvertedTimeout = 2;
   options.transportType = GRPCTransportTypeInsecure;
   options.flowControlEnabled = YES;
   __block NSUInteger messageId = 0;
-  __block GRPCCall2 *call = [[GRPCCall2 alloc]
-      initWithRequestOptions:callRequest
-             responseHandler:[[ClientTestsBlockCallbacks alloc] initWithInitialMetadataCallback:nil
-                                 messageCallback:^(NSData *message) {
-                                   if (messageId <= 1) {
-                                     [expectPassedMessage fulfill];
-                                   } else {
-                                     [expectBlockedMessage fulfill];
-                                   }
-                                   messageId++;
-                                 }
-                                 closeCallback:nil
-                                 writeDataCallback:^{
-                                   [expectWriteTwice fulfill];
-                                 }]
-                 callOptions:options];
+  __block GRPCCall2 *call =
+      [[GRPCCall2 alloc] initWithRequestOptions:callRequest
+                                responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
+                                                    initWithInitialMetadataCallback:nil
+                                                    messageCallback:^(NSData *message) {
+                                                      if (messageId <= 1) {
+                                                        [expectPassedMessage fulfill];
+                                                      } else {
+                                                        [expectBlockedMessage fulfill];
+                                                      }
+                                                      messageId++;
+                                                    }
+                                                    closeCallback:nil
+                                                    writeDataCallback:^{
+                                                      [expectWriteTwice fulfill];
+                                                    }]
+                                    callOptions:options];
 
   [call receiveNextMessages:2];
   [call start];
@@ -631,7 +512,8 @@ static const NSTimeInterval kInvertedTimeout = 2;
   __block BOOL closed = NO;
   GRPCCall2 *call = [[GRPCCall2 alloc]
       initWithRequestOptions:callRequest
-             responseHandler:[[ClientTestsBlockCallbacks alloc] initWithInitialMetadataCallback:nil
+             responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
+                                 initWithInitialMetadataCallback:nil
                                  messageCallback:^(NSData *message) {
                                    [expectPassedMessage fulfill];
                                    XCTAssertFalse(closed);
@@ -672,7 +554,8 @@ static const NSTimeInterval kInvertedTimeout = 2;
   __block BOOL closed = NO;
   GRPCCall2 *call = [[GRPCCall2 alloc]
       initWithRequestOptions:callRequest
-             responseHandler:[[ClientTestsBlockCallbacks alloc] initWithInitialMetadataCallback:nil
+             responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
+                                 initWithInitialMetadataCallback:nil
                                  messageCallback:^(NSData *message) {
                                    [expectPassedMessage fulfill];
                                    XCTAssertFalse(closed);
@@ -712,7 +595,8 @@ static const NSTimeInterval kInvertedTimeout = 2;
 
   GRPCCall2 *call = [[GRPCCall2 alloc]
       initWithRequestOptions:requestOptions
-             responseHandler:[[ClientTestsBlockCallbacks alloc] initWithInitialMetadataCallback:nil
+             responseHandler:[[GRPCBlockCallbackResponseHandler alloc]
+                                 initWithInitialMetadataCallback:nil
                                  messageCallback:^(NSData *data) {
                                    XCTFail(@"Received unexpected message");
                                  }

src/objective-c/tests/UnitTests/GRPCClientTests.m

@@ -44,7 +44,6 @@
 static NSString *const kHostAddress = NSStringize(HOST_PORT_LOCAL);
 static NSString *const kPackage = @"grpc.testing";
 static NSString *const kService = @"TestService";
-static NSString *const kRemoteSSLHost = NSStringize(HOST_PORT_REMOTE);
 
 static GRPCProtoMethod *kInexistentMethod;
 static GRPCProtoMethod *kEmptyCallMethod;
@@ -210,42 +209,6 @@ static GRPCProtoMethod *kFullDuplexCallMethod;
   [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
 }
 
-- (void)testMetadata {
-  __weak XCTestExpectation *expectation = [self expectationWithDescription:@"RPC unauthorized."];
-
-  RMTSimpleRequest *request = [RMTSimpleRequest message];
-  request.fillUsername = YES;
-  request.fillOauthScope = YES;
-  GRXWriter *requestsWriter = [GRXWriter writerWithValue:[request data]];
-
-  GRPCCall *call = [[GRPCCall alloc] initWithHost:kRemoteSSLHost
-                                             path:kUnaryCallMethod.HTTPPath
-                                   requestsWriter:requestsWriter];
-
-  call.oauth2AccessToken = @"bogusToken";
-
-  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc]
-      initWithValueHandler:^(NSData *value) {
-        XCTFail(@"Received unexpected response: %@", value);
-      }
-      completionHandler:^(NSError *errorOrNil) {
-        XCTAssertNotNil(errorOrNil, @"Finished without error!");
-        XCTAssertEqual(errorOrNil.code, 16, @"Finished with unexpected error: %@", errorOrNil);
-        XCTAssertEqualObjects(call.responseHeaders, errorOrNil.userInfo[kGRPCHeadersKey],
-                              @"Headers in the NSError object and call object differ.");
-        XCTAssertEqualObjects(call.responseTrailers, errorOrNil.userInfo[kGRPCTrailersKey],
-                              @"Trailers in the NSError object and call object differ.");
-        NSString *challengeHeader = call.oauth2ChallengeHeader;
-        XCTAssertGreaterThan(challengeHeader.length, 0, @"No challenge in response headers %@",
-                             call.responseHeaders);
-        [expectation fulfill];
-      }];
-
-  [call startWithWriteable:responsesWriteable];
-
-  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
-}
-
 - (void)testResponseMetadataKVO {
   __weak XCTestExpectation *response =
       [self expectationWithDescription:@"Empty response received."];
@@ -569,39 +532,4 @@ static GRPCProtoMethod *kFullDuplexCallMethod;
   [self testTimeoutBackoffWithTimeout:0.3 Backoff:0.7];
 }
 
-- (void)testErrorDebugInformation {
-  __weak XCTestExpectation *expectation = [self expectationWithDescription:@"RPC unauthorized."];
-
-  RMTSimpleRequest *request = [RMTSimpleRequest message];
-  request.fillUsername = YES;
-  request.fillOauthScope = YES;
-  GRXWriter *requestsWriter = [GRXWriter writerWithValue:[request data]];
-
-  GRPCCall *call = [[GRPCCall alloc] initWithHost:kRemoteSSLHost
-                                             path:kUnaryCallMethod.HTTPPath
-                                   requestsWriter:requestsWriter];
-
-  call.oauth2AccessToken = @"bogusToken";
-
-  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc]
-      initWithValueHandler:^(NSData *value) {
-        XCTFail(@"Received unexpected response: %@", value);
-      }
-      completionHandler:^(NSError *errorOrNil) {
-        XCTAssertNotNil(errorOrNil, @"Finished without error!");
-        NSDictionary *userInfo = errorOrNil.userInfo;
-        NSString *debugInformation = userInfo[NSDebugDescriptionErrorKey];
-        XCTAssertNotNil(debugInformation);
-        XCTAssertNotEqual([debugInformation length], 0);
-        NSString *challengeHeader = call.oauth2ChallengeHeader;
-        XCTAssertGreaterThan(challengeHeader.length, 0, @"No challenge in response headers %@",
-                             call.responseHeaders);
-        [expectation fulfill];
-      }];
-
-  [call startWithWriteable:responsesWriteable];
-
-  [self waitForExpectationsWithTimeout:TEST_TIMEOUT handler:nil];
-}
-
 @end