Merge branch 'master' of github.com:grpc/grpc into core_creds_api_change

49 files changed, 1747 insertions, 678 deletions

diff --git a/src/objective-c/GRPCClient/GRPCCall+OAuth2.h b/src/objective-c/GRPCClient/GRPCCall+OAuth2.h
index 2e379a7157..6b443877e9 100644
--- a/src/objective-c/GRPCClient/GRPCCall+OAuth2.h
+++ b/src/objective-c/GRPCClient/GRPCCall+OAuth2.h
@@ -33,17 +33,19 @@
 
 #import "GRPCCall.h"
 
-// Helpers for setting and reading headers compatible with OAuth2.
+/** Helpers for setting and reading headers compatible with OAuth2. */
 @interface GRPCCall (OAuth2)
 
-// Setting this property is equivalent to setting "Bearer <passed token>" as the value of the
-// request header with key "authorization" (the authorization header). Setting it to nil removes the
-// authorization header from the request.
-// The value obtained by getting the property is the OAuth2 bearer token if the authorization header
-// of the request has the form "Bearer <token>", or nil otherwise.
+/**
+ * Setting this property is equivalent to setting "Bearer <passed token>" as the value of the
+ * request header with key "authorization" (the authorization header). Setting it to nil removes the
+ * authorization header from the request.
+ * The value obtained by getting the property is the OAuth2 bearer token if the authorization header
+ * of the request has the form "Bearer <token>", or nil otherwise.
+ */
 @property(atomic, copy) NSString *oauth2AccessToken;
 
-// Returns the value (if any) of the "www-authenticate" response header (the challenge header).
+/** Returns the value (if any) of the "www-authenticate" response header (the challenge header). */
 @property(atomic, readonly) NSString *oauth2ChallengeHeader;
 
 @end
diff --git a/src/objective-c/GRPCClient/GRPCCall+Tests.h b/src/objective-c/GRPCClient/GRPCCall+Tests.h
index cca1614606..ccc5723ec7 100644
--- a/src/objective-c/GRPCClient/GRPCCall+Tests.h
+++ b/src/objective-c/GRPCClient/GRPCCall+Tests.h
@@ -33,22 +33,28 @@
 
 #import "GRPCCall.h"
 
-// Methods to let tune down the security of gRPC connections for specific hosts. These shouldn't be
-// used in releases, but are sometimes needed for testing.
+/**
+ * Methods to let tune down the security of gRPC connections for specific hosts. These shouldn't be
+ * used in releases, but are sometimes needed for testing.
+ */
 @interface GRPCCall (Tests)
 
-// Establish all SSL connections to the provided host using the passed SSL target name and the root
-// certificates found in the file at |certsPath|.
-//
-// Must be called before any gRPC call to that host is made. It's illegal to pass the same host to
-// more than one invocation of the methods of this category.
+/**
+ * Establish all SSL connections to the provided host using the passed SSL target name and the root
+ * certificates found in the file at |certsPath|.
+ *
+ * Must be called before any gRPC call to that host is made. It's illegal to pass the same host to
+ * more than one invocation of the methods of this category.
+ */
 + (void)useTestCertsPath:(NSString *)certsPath
                 testName:(NSString *)testName
                  forHost:(NSString *)host;
 
-// Establish all connections to the provided host using cleartext instead of SSL.
-//
-// Must be called before any gRPC call to that host is made. It's illegal to pass the same host to
-// more than one invocation of the methods of this category.
+/**
+ * Establish all connections to the provided host using cleartext instead of SSL.
+ *
+ * Must be called before any gRPC call to that host is made. It's illegal to pass the same host to
+ * more than one invocation of the methods of this category.
+ */
 + (void)useInsecureConnectionsForHost:(NSString *)host;
 @end
diff --git a/src/objective-c/GRPCClient/GRPCCall+Tests.m b/src/objective-c/GRPCClient/GRPCCall+Tests.m
index bade0b2920..c8e8133703 100644
--- a/src/objective-c/GRPCClient/GRPCCall+Tests.m
+++ b/src/objective-c/GRPCClient/GRPCCall+Tests.m
@@ -40,6 +40,9 @@
 + (void)useTestCertsPath:(NSString *)certsPath
                 testName:(NSString *)testName
                  forHost:(NSString *)host {
+  if (!host || !certsPath || !testName) {
+    [NSException raise:NSInvalidArgumentException format:@"host, path and name must be provided."];
+  }
   GRPCHost *hostConfig = [GRPCHost hostWithAddress:host];
   hostConfig.pathToCertificates = certsPath;
   hostConfig.hostNameOverride = testName;
diff --git a/src/objective-c/GRPCClient/GRPCCall.h b/src/objective-c/GRPCClient/GRPCCall.h
index 35f7e16af7..5918f8857a 100644
--- a/src/objective-c/GRPCClient/GRPCCall.h
+++ b/src/objective-c/GRPCClient/GRPCCall.h
@@ -31,117 +31,145 @@
  *
  */
 
-// The gRPC protocol is an RPC protocol on top of HTTP2.
-//
-// While the most common type of RPC receives only one request message and returns only one response
-// message, the protocol also supports RPCs that return multiple individual messages in a streaming
-// fashion, RPCs that accept a stream of request messages, or RPCs with both streaming requests and
-// responses.
-//
-// Conceptually, each gRPC call consists of a bidirectional stream of binary messages, with RPCs of
-// the "non-streaming type" sending only one message in the corresponding direction (the protocol
-// doesn't make any distinction).
-//
-// Each RPC uses a different HTTP2 stream, and thus multiple simultaneous RPCs can be multiplexed
-// transparently on the same TCP connection.
+/**
+ * The gRPC protocol is an RPC protocol on top of HTTP2.
+ *
+ * While the most common type of RPC receives only one request message and returns only one response
+ * message, the protocol also supports RPCs that return multiple individual messages in a streaming
+ * fashion, RPCs that accept a stream of request messages, or RPCs with both streaming requests and
+ * responses.
+ *
+ * Conceptually, each gRPC call consists of a bidirectional stream of binary messages, with RPCs of
+ * the "non-streaming type" sending only one message in the corresponding direction (the protocol
+ * doesn't make any distinction).
+ *
+ * Each RPC uses a different HTTP2 stream, and thus multiple simultaneous RPCs can be multiplexed
+ * transparently on the same TCP connection.
+ */
 
 #import <Foundation/Foundation.h>
 #import <RxLibrary/GRXWriter.h>
 
 #pragma mark gRPC errors
 
-// Domain of NSError objects produced by gRPC.
+/** Domain of NSError objects produced by gRPC. */
 extern NSString *const kGRPCErrorDomain;
 
-// gRPC error codes.
-// Note that a few of these are never produced by the gRPC libraries, but are of general utility for
-// server applications to produce.
+/**
+ * gRPC error codes.
+ * Note that a few of these are never produced by the gRPC libraries, but are of general utility for
+ * server applications to produce.
+ */
 typedef NS_ENUM(NSUInteger, GRPCErrorCode) {
-  // The operation was cancelled (typically by the caller).
+  /** The operation was cancelled (typically by the caller). */
   GRPCErrorCodeCancelled = 1,
 
-  // Unknown error. Errors raised by APIs that do not return enough error information may be
-  // converted to this error.
+  /**
+   * Unknown error. Errors raised by APIs that do not return enough error information may be
+   * converted to this error.
+   */
   GRPCErrorCodeUnknown = 2,
 
-  // The client specified an invalid argument. Note that this differs from FAILED_PRECONDITION.
-  // INVALID_ARGUMENT indicates arguments that are problematic regardless of the state of the
-  // server (e.g., a malformed file name).
+  /**
+   * The client specified an invalid argument. Note that this differs from FAILED_PRECONDITION.
+   * INVALID_ARGUMENT indicates arguments that are problematic regardless of the state of the
+   * server (e.g., a malformed file name).
+   */
   GRPCErrorCodeInvalidArgument = 3,
 
-  // Deadline expired before operation could complete. For operations that change the state of the
-  // server, this error may be returned even if the operation has completed successfully. For
-  // example, a successful response from the server could have been delayed long enough for the
-  // deadline to expire.
+  /**
+   * Deadline expired before operation could complete. For operations that change the state of the
+   * server, this error may be returned even if the operation has completed successfully. For
+   * example, a successful response from the server could have been delayed long enough for the
+   * deadline to expire.
+   */
   GRPCErrorCodeDeadlineExceeded = 4,
 
-  // Some requested entity (e.g., file or directory) was not found.
+  /** Some requested entity (e.g., file or directory) was not found. */
   GRPCErrorCodeNotFound = 5,
 
-  // Some entity that we attempted to create (e.g., file or directory) already exists.
+  /** Some entity that we attempted to create (e.g., file or directory) already exists. */
   GRPCErrorCodeAlreadyExists = 6,
 
-  // The caller does not have permission to execute the specified operation. PERMISSION_DENIED isn't
-  // used for rejections caused by exhausting some resource (RESOURCE_EXHAUSTED is used instead for
-  // those errors). PERMISSION_DENIED doesn't indicate a failure to identify the caller
-  // (UNAUTHENTICATED is used instead for those errors).
+  /**
+   * The caller does not have permission to execute the specified operation. PERMISSION_DENIED isn't
+   * used for rejections caused by exhausting some resource (RESOURCE_EXHAUSTED is used instead for
+   * those errors). PERMISSION_DENIED doesn't indicate a failure to identify the caller
+   * (UNAUTHENTICATED is used instead for those errors).
+   */
   GRPCErrorCodePermissionDenied = 7,
 
-  // The request does not have valid authentication credentials for the operation (e.g. the caller's
-  // identity can't be verified).
+  /**
+   * The request does not have valid authentication credentials for the operation (e.g. the caller's
+   * identity can't be verified).
+   */
   GRPCErrorCodeUnauthenticated = 16,
 
-  // Some resource has been exhausted, perhaps a per-user quota.
+  /** Some resource has been exhausted, perhaps a per-user quota. */
   GRPCErrorCodeResourceExhausted = 8,
 
-  // The RPC was rejected because the server is not in a state required for the procedure's
-  // execution. For example, a directory to be deleted may be non-empty, etc.
-  // The client should not retry until the server state has been explicitly fixed (e.g. by
-  // performing another RPC). The details depend on the service being called, and should be found in
-  // the NSError's userInfo.
+  /**
+   * The RPC was rejected because the server is not in a state required for the procedure's
+   * execution. For example, a directory to be deleted may be non-empty, etc.
+   * The client should not retry until the server state has been explicitly fixed (e.g. by
+   * performing another RPC). The details depend on the service being called, and should be found in
+   * the NSError's userInfo.
+   */
   GRPCErrorCodeFailedPrecondition = 9,
 
-  // The RPC was aborted, typically due to a concurrency issue like sequencer check failures,
-  // transaction aborts, etc. The client should retry at a higher-level (e.g., restarting a read-
-  // modify-write sequence).
+  /**
+   * The RPC was aborted, typically due to a concurrency issue like sequencer check failures,
+   * transaction aborts, etc. The client should retry at a higher-level (e.g., restarting a read-
+   * modify-write sequence).
+   */
   GRPCErrorCodeAborted = 10,
 
-  // The RPC was attempted past the valid range. E.g., enumerating past the end of a list.
-  // Unlike INVALID_ARGUMENT, this error indicates a problem that may be fixed if the system state
-  // changes. For example, an RPC to get elements of a list will generate INVALID_ARGUMENT if asked
-  // to return the element at a negative index, but it will generate OUT_OF_RANGE if asked to return
-  // the element at an index past the current size of the list.
+  /**
+   * The RPC was attempted past the valid range. E.g., enumerating past the end of a list.
+   * Unlike INVALID_ARGUMENT, this error indicates a problem that may be fixed if the system state
+   * changes. For example, an RPC to get elements of a list will generate INVALID_ARGUMENT if asked
+   * to return the element at a negative index, but it will generate OUT_OF_RANGE if asked to return
+   * the element at an index past the current size of the list.
+   */
   GRPCErrorCodeOutOfRange = 11,
 
-  // The procedure is not implemented or not supported/enabled in this server.
+  /** The procedure is not implemented or not supported/enabled in this server. */
   GRPCErrorCodeUnimplemented = 12,
 
-  // Internal error. Means some invariant expected by the server application or the gRPC library has
-  // been broken.
+  /**
+   * Internal error. Means some invariant expected by the server application or the gRPC library has
+   * been broken.
+   */
   GRPCErrorCodeInternal = 13,
 
-  // The server is currently unavailable. This is most likely a transient condition and may be
-  // corrected by retrying with a backoff.
+  /**
+   * The server is currently unavailable. This is most likely a transient condition and may be
+   * corrected by retrying with a backoff.
+   */
   GRPCErrorCodeUnavailable = 14,
 
-  // Unrecoverable data loss or corruption.
+  /** Unrecoverable data loss or corruption. */
   GRPCErrorCodeDataLoss = 15,
 };
 
-// Keys used in |NSError|'s |userInfo| dictionary to store the response headers and trailers sent by
-// the server.
+/**
+ * Keys used in |NSError|'s |userInfo| dictionary to store the response headers and trailers sent by
+ * the server.
+ */
 extern id const kGRPCHeadersKey;
 extern id const kGRPCTrailersKey;
 
 #pragma mark GRPCCall
 
-// The container of the request headers of an RPC conforms to this protocol, which is a subset of
-// NSMutableDictionary's interface. It will become a NSMutableDictionary later on.
-// The keys of this container are the header names, which per the HTTP standard are case-
-// insensitive. They are stored in lowercase (which is how HTTP/2 mandates them on the wire), and
-// can only consist of ASCII characters.
-// A header value is a NSString object (with only ASCII characters), unless the header name has the
-// suffix "-bin", in which case the value has to be a NSData object.
+/**
+ * The container of the request headers of an RPC conforms to this protocol, which is a subset of
+ * NSMutableDictionary's interface. It will become a NSMutableDictionary later on.
+ * The keys of this container are the header names, which per the HTTP standard are case-
+ * insensitive. They are stored in lowercase (which is how HTTP/2 mandates them on the wire), and
+ * can only consist of ASCII characters.
+ * A header value is a NSString object (with only ASCII characters), unless the header name has the
+ * suffix "-bin", in which case the value has to be a NSData object.
+ */
 @protocol GRPCRequestHeaders <NSObject>
 
 @property(nonatomic, readonly) NSUInteger count;
@@ -154,53 +182,63 @@ extern id const kGRPCTrailersKey;
 
 @end
 
-// Represents a single gRPC remote call.
+/** Represents a single gRPC remote call. */
 @interface GRPCCall : GRXWriter
 
-// These HTTP headers will be passed to the server as part of this call. Each HTTP header is a
-// name-value pair with string names and either string or binary values.
-//
-// The passed dictionary has to use NSString keys, corresponding to the header names. The value
-// associated to each can be a NSString object or a NSData object. E.g.:
-//
-// call.requestHeaders = @{@"authorization": @"Bearer ..."};
-//
-// call.requestHeaders[@"my-header-bin"] = someData;
-//
-// After the call is started, trying to modify this property is an error.
-//
-// The property is initialized to an empty NSMutableDictionary.
+/**
+ * These HTTP headers will be passed to the server as part of this call. Each HTTP header is a
+ * name-value pair with string names and either string or binary values.
+ *
+ * The passed dictionary has to use NSString keys, corresponding to the header names. The value
+ * associated to each can be a NSString object or a NSData object. E.g.:
+ *
+ * call.requestHeaders = @{@"authorization": @"Bearer ..."};
+ *
+ * call.requestHeaders[@"my-header-bin"] = someData;
+ *
+ * After the call is started, trying to modify this property is an error.
+ *
+ * The property is initialized to an empty NSMutableDictionary.
+ */
 @property(atomic, readonly) id<GRPCRequestHeaders> requestHeaders;
 
-// This dictionary is populated with the HTTP headers received from the server. This happens before
-// any response message is received from the server. It has the same structure as the request
-// headers dictionary: Keys are NSString header names; names ending with the suffix "-bin" have a
-// NSData value; the others have a NSString value.
-//
-// The value of this property is nil until all response headers are received, and will change before
-// any of -writeValue: or -writesFinishedWithError: are sent to the writeable.
+/**
+ * This dictionary is populated with the HTTP headers received from the server. This happens before
+ * any response message is received from the server. It has the same structure as the request
+ * headers dictionary: Keys are NSString header names; names ending with the suffix "-bin" have a
+ * NSData value; the others have a NSString value.
+ *
+ * The value of this property is nil until all response headers are received, and will change before
+ * any of -writeValue: or -writesFinishedWithError: are sent to the writeable.
+ */
 @property(atomic, readonly) NSDictionary *responseHeaders;
 
-// Same as responseHeaders, but populated with the HTTP trailers received from the server before the
-// call finishes.
-//
-// The value of this property is nil until all response trailers are received, and will change
-// before -writesFinishedWithError: is sent to the writeable.
+/**
+ * Same as responseHeaders, but populated with the HTTP trailers received from the server before the
+ * call finishes.
+ *
+ * The value of this property is nil until all response trailers are received, and will change
+ * before -writesFinishedWithError: is sent to the writeable.
+ */
 @property(atomic, readonly) NSDictionary *responseTrailers;
 
-// The request writer has to write NSData objects into the provided Writeable. The server will
-// receive each of those separately and in order as distinct messages.
-// A gRPC call might not complete until the request writer finishes. On the other hand, the request
-// finishing doesn't necessarily make the call to finish, as the server might continue sending
-// messages to the response side of the call indefinitely (depending on the semantics of the
-// specific remote method called).
-// To finish a call right away, invoke cancel.
+/**
+ * The request writer has to write NSData objects into the provided Writeable. The server will
+ * receive each of those separately and in order as distinct messages.
+ * A gRPC call might not complete until the request writer finishes. On the other hand, the request
+ * finishing doesn't necessarily make the call to finish, as the server might continue sending
+ * messages to the response side of the call indefinitely (depending on the semantics of the
+ * specific remote method called).
+ * To finish a call right away, invoke cancel.
+ */
 - (instancetype)initWithHost:(NSString *)host
                         path:(NSString *)path
               requestsWriter:(GRXWriter *)requestsWriter NS_DESIGNATED_INITIALIZER;
 
-// Finishes the request side of this call, notifies the server that the RPC should be cancelled, and
-// finishes the response side of the call with an error of code CANCELED.
+/**
+ * Finishes the request side of this call, notifies the server that the RPC should be cancelled, and
+ * finishes the response side of the call with an error of code CANCELED.
+ */
 - (void)cancel;
 
 // TODO(jcanizales): Let specify a deadline. As a category of GRXWriter?
diff --git a/src/objective-c/GRPCClient/private/GRPCChannel.h b/src/objective-c/GRPCClient/private/GRPCChannel.h
index 2a7b701576..e2d19d506a 100644
--- a/src/objective-c/GRPCClient/private/GRPCChannel.h
+++ b/src/objective-c/GRPCClient/private/GRPCChannel.h
@@ -35,12 +35,16 @@
 
 struct grpc_channel;
 
-// Each separate instance of this class represents at least one TCP connection to the provided host.
-// Create them using one of the subclasses |GRPCSecureChannel| and |GRPCUnsecuredChannel|.
+/**
+ * Each separate instance of this class represents at least one TCP connection to the provided host.
+ * Create them using one of the subclasses |GRPCSecureChannel| and |GRPCUnsecuredChannel|.
+ */
 @interface GRPCChannel : NSObject
 @property(nonatomic, readonly) struct grpc_channel *unmanagedChannel;
 
-// This initializer takes ownership of the passed channel, and will destroy it when this object is
-// deallocated. It's illegal to pass the same grpc_channel to two different GRPCChannel objects.
+/**
+ * This initializer takes ownership of the passed channel, and will destroy it when this object is
+ * deallocated. It's illegal to pass the same grpc_channel to two different GRPCChannel objects.
+ */
 - (instancetype)initWithChannel:(struct grpc_channel *)unmanagedChannel NS_DESIGNATED_INITIALIZER;
 @end
diff --git a/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h b/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
index ab8d714d22..fe3b8f39d1 100644
--- a/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
+++ b/src/objective-c/GRPCClient/private/GRPCCompletionQueue.h
@@ -36,15 +36,17 @@
 
 typedef void(^GRPCQueueCompletionHandler)(bool success);
 
-// This class lets one more easily use |grpc_completion_queue|. To use it, pass the value of the
-// |unmanagedQueue| property of an instance of this class to |grpc_channel_create_call|. Then for
-// every |grpc_call_*| method that accepts a tag, you can pass a block of type
-// |GRPCQueueCompletionHandler| (remembering to cast it using |__bridge_retained|). The block is
-// guaranteed to eventually be called, by a concurrent queue, and then released. Each such block is
-// passed a |bool| that tells if the operation was successful.
-//
-// Release the GRPCCompletionQueue object only after you are not going to pass any more blocks to
-// the |grpc_call| that's using it.
+/**
+ * This class lets one more easily use |grpc_completion_queue|. To use it, pass the value of the
+ * |unmanagedQueue| property of an instance of this class to |grpc_channel_create_call|. Then for
+ * every |grpc_call_*| method that accepts a tag, you can pass a block of type
+ * |GRPCQueueCompletionHandler| (remembering to cast it using |__bridge_retained|). The block is
+ * guaranteed to eventually be called, by a concurrent queue, and then released. Each such block is
+ * passed a |bool| that tells if the operation was successful.
+ *
+ * Release the GRPCCompletionQueue object only after you are not going to pass any more blocks to
+ * the |grpc_call| that's using it.
+ */
 @interface GRPCCompletionQueue : NSObject
 @property(nonatomic, readonly) grpc_completion_queue *unmanagedQueue;
 
diff --git a/src/objective-c/GRPCClient/private/GRPCHost.h b/src/objective-c/GRPCClient/private/GRPCHost.h
index f0bbd53023..6b4f98746d 100644
--- a/src/objective-c/GRPCClient/private/GRPCHost.h
+++ b/src/objective-c/GRPCClient/private/GRPCHost.h
@@ -40,18 +40,18 @@ struct grpc_call;
 
 @property(nonatomic, readonly) NSString *address;
 
-// The following properties should only be modified for testing:
+/** The following properties should only be modified for testing: */
 
 @property(nonatomic, getter=isSecure) BOOL secure;
 
 @property(nonatomic, copy) NSString *pathToCertificates;
 @property(nonatomic, copy) NSString *hostNameOverride;
 
-// Host objects initialized with the same address are the same.
+/** Host objects initialized with the same address are the same. */
 + (instancetype)hostWithAddress:(NSString *)address;
 - (instancetype)initWithAddress:(NSString *)address NS_DESIGNATED_INITIALIZER;
 
-// Create a grpc_call object to the provided path on this host.
+/** Create a grpc_call object to the provided path on this host. */
 - (struct grpc_call *)unmanagedCallWithPath:(NSString *)path
                             completionQueue:(GRPCCompletionQueue *)queue;
 
diff --git a/src/objective-c/GRPCClient/private/GRPCSecureChannel.h b/src/objective-c/GRPCClient/private/GRPCSecureChannel.h
index 3f5f2a58ec..b82b9fe35a 100644
--- a/src/objective-c/GRPCClient/private/GRPCSecureChannel.h
+++ b/src/objective-c/GRPCClient/private/GRPCSecureChannel.h
@@ -40,13 +40,15 @@ struct grpc_channel_credentials;
 @interface GRPCSecureChannel : GRPCChannel
 - (instancetype)initWithHost:(NSString *)host;
 
-// Only in tests shouldn't pathToCertificates or hostNameOverride be nil. Passing nil for
-// pathToCertificates results in using the default root certificates distributed with the library.
+/**
+ * Only in tests shouldn't pathToCertificates or hostNameOverride be nil. Passing nil for
+ * pathToCertificates results in using the default root certificates distributed with the library.
+ */
 - (instancetype)initWithHost:(NSString *)host
           pathToCertificates:(NSString *)path
             hostNameOverride:(NSString *)hostNameOverride;
 
-// The passed arguments aren't required to be valid beyond the invocation of this initializer.
+/** The passed arguments aren't required to be valid beyond the invocation of this initializer. */
 - (instancetype)initWithHost:(NSString *)host
                  credentials:(struct grpc_channel_credentials *)credentials
                         args:(grpc_channel_args *)args NS_DESIGNATED_INITIALIZER;
diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.h b/src/objective-c/GRPCClient/private/GRPCWrappedCall.h
index 4ca2766147..7747aa53ef 100644
--- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.h
+++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.h
@@ -39,7 +39,7 @@
 
 @interface GRPCOperation : NSObject
 @property(nonatomic, readonly) grpc_op op;
-// Guaranteed to be called when the operation has finished.
+/** Guaranteed to be called when the operation has finished. */
 - (void)finish;
 @end
 
diff --git a/src/objective-c/GRPCClient/private/NSError+GRPC.h b/src/objective-c/GRPCClient/private/NSError+GRPC.h
index f4729dc8a1..e0c1efc1f9 100644
--- a/src/objective-c/GRPCClient/private/NSError+GRPC.h
+++ b/src/objective-c/GRPCClient/private/NSError+GRPC.h
@@ -35,7 +35,9 @@
 #include <grpc/grpc.h>
 
 @interface NSError (GRPC)
-// Returns nil if the status code is OK. Otherwise, a NSError whose code is one of |GRPCErrorCode|
-// and whose domain is |kGRPCErrorDomain|.
+/**
+ * Returns nil if the status code is OK. Otherwise, a NSError whose code is one of |GRPCErrorCode|
+ * and whose domain is |kGRPCErrorDomain|.
+ */
 + (instancetype)grpc_errorFromStatusCode:(grpc_status_code)statusCode details:(char *)details;
 @end
diff --git a/src/objective-c/ProtoRPC/ProtoMethod.h b/src/objective-c/ProtoRPC/ProtoMethod.h
index 8f554a0483..a0ed2cf98a 100644
--- a/src/objective-c/ProtoRPC/ProtoMethod.h
+++ b/src/objective-c/ProtoRPC/ProtoMethod.h
@@ -33,8 +33,10 @@
 
 #import <Foundation/Foundation.h>
 
-// A fully-qualified proto service method name. Full qualification is needed because a gRPC endpoint
-// can implement multiple services.
+/**
+ * A fully-qualified proto service method name. Full qualification is needed because a gRPC endpoint
+ * can implement multiple services.
+ */
 @interface ProtoMethod : NSObject
 @property(nonatomic, readonly) NSString *package;
 @property(nonatomic, readonly) NSString *service;
diff --git a/src/objective-c/README.md b/src/objective-c/README.md
index a861a9f6f9..c1d25b96f5 100644
--- a/src/objective-c/README.md
+++ b/src/objective-c/README.md
@@ -1,3 +1,4 @@
+[![Cocoapods](https://img.shields.io/cocoapods/v/gRPC.svg)](https://cocoapods.org/pods/gRPC)
 # gRPC for Objective-C
 
 - [Install protoc with the gRPC plugin](#install)
diff --git a/src/objective-c/RxLibrary/GRXBufferedPipe.h b/src/objective-c/RxLibrary/GRXBufferedPipe.h
index ca94ce275f..03b0359278 100644
--- a/src/objective-c/RxLibrary/GRXBufferedPipe.h
+++ b/src/objective-c/RxLibrary/GRXBufferedPipe.h
@@ -36,25 +36,27 @@
 #import "GRXWriteable.h"
 #import "GRXWriter.h"
 
-// A buffered pipe is a Writer that also acts as a Writeable.
-// Once it is started, whatever values are written into it (via -writeValue:) will be propagated
-// immediately, unless flow control prevents it.
-// If it is throttled and keeps receiving values, as well as if it receives values before being
-// started, it will buffer them and propagate them in order as soon as its state becomes Started.
-// If it receives an error (via -writesFinishedWithError:), it will drop any buffered values and
-// propagate the error immediately.
-//
-// Beware that a pipe of this type can't prevent receiving more values when it is paused (for
-// example if used to write data to a congested network connection). Because in such situations the
-// pipe will keep buffering all data written to it, your application could run out of memory and
-// crash. If you want to react to flow control signals to prevent that, instead of using this class
-// you can implement an object that conforms to GRXWriter.
-//
-// Thread-safety:
-// The methods of an object of this class should not be called concurrently from different threads.
+/**
+ * A buffered pipe is a Writer that also acts as a Writeable.
+ * Once it is started, whatever values are written into it (via -writeValue:) will be propagated
+ * immediately, unless flow control prevents it.
+ * If it is throttled and keeps receiving values, as well as if it receives values before being
+ * started, it will buffer them and propagate them in order as soon as its state becomes Started.
+ * If it receives an error (via -writesFinishedWithError:), it will drop any buffered values and
+ * propagate the error immediately.
+ *
+ * Beware that a pipe of this type can't prevent receiving more values when it is paused (for
+ * example if used to write data to a congested network connection). Because in such situations the
+ * pipe will keep buffering all data written to it, your application could run out of memory and
+ * crash. If you want to react to flow control signals to prevent that, instead of using this class
+ * you can implement an object that conforms to GRXWriter.
+ *
+ * Thread-safety:
+ * The methods of an object of this class should not be called concurrently from different threads.
+ */
 @interface GRXBufferedPipe : GRXWriter<GRXWriteable>
 
-// Convenience constructor.
+/** Convenience constructor. */
 + (instancetype)pipe;
 
 @end
diff --git a/src/objective-c/RxLibrary/GRXConcurrentWriteable.h b/src/objective-c/RxLibrary/GRXConcurrentWriteable.h
index 1080001905..b2775f98b5 100644
--- a/src/objective-c/RxLibrary/GRXConcurrentWriteable.h
+++ b/src/objective-c/RxLibrary/GRXConcurrentWriteable.h
@@ -36,36 +36,48 @@
 #import "GRXWriter.h"
 #import "GRXWriteable.h"
 
-// This is a thread-safe wrapper over a GRXWriteable instance. It lets one enqueue calls to a
-// GRXWriteable instance for the main thread, guaranteeing that writesFinishedWithError: is the last
-// message sent to it (no matter what messages are sent to the wrapper, in what order, nor from
-// which thread). It also guarantees that, if cancelWithError: is called from the main thread (e.g.
-// by the app cancelling the writes), no further messages are sent to the writeable except
-// writesFinishedWithError:.
-//
-// TODO(jcanizales): Let the user specify another queue for the writeable callbacks.
+/**
+ * This is a thread-safe wrapper over a GRXWriteable instance. It lets one enqueue calls to a
+ * GRXWriteable instance for the main thread, guaranteeing that writesFinishedWithError: is the last
+ * message sent to it (no matter what messages are sent to the wrapper, in what order, nor from
+ * which thread). It also guarantees that, if cancelWithError: is called from the main thread (e.g.
+ * by the app cancelling the writes), no further messages are sent to the writeable except
+ * writesFinishedWithError:.
+ *
+ * TODO(jcanizales): Let the user specify another queue for the writeable callbacks.
+ */
 @interface GRXConcurrentWriteable : NSObject
 
-// The GRXWriteable passed is the wrapped writeable.
-// The GRXWriteable instance is retained until writesFinishedWithError: is sent to it, and released
-// after that.
+/**
+ * The GRXWriteable passed is the wrapped writeable.
+ * The GRXWriteable instance is retained until writesFinishedWithError: is sent to it, and released
+ * after that.
+ */
 - (instancetype)initWithWriteable:(id<GRXWriteable>)writeable NS_DESIGNATED_INITIALIZER;
 
-// Enqueues writeValue: to be sent to the writeable in the main thread.
-// The passed handler is invoked from the main thread after writeValue: returns.
+/**
+ * Enqueues writeValue: to be sent to the writeable in the main thread.
+ * The passed handler is invoked from the main thread after writeValue: returns.
+ */
 - (void)enqueueValue:(id)value completionHandler:(void (^)())handler;
 
-// Enqueues writesFinishedWithError:nil to be sent to the writeable in the main thread. After that
-// message is sent to the writeable, all other methods of this object are effectively noops.
+/**
+ * Enqueues writesFinishedWithError:nil to be sent to the writeable in the main thread. After that
+ * message is sent to the writeable, all other methods of this object are effectively noops.
+ */
 - (void)enqueueSuccessfulCompletion;
 
-// If the writeable has not yet received a writesFinishedWithError: message, this will enqueue one
-// to be sent to it in the main thread, and cancel all other pending messages to the writeable
-// enqueued by this object (both past and future).
-// The error argument cannot be nil.
+/**
+ * If the writeable has not yet received a writesFinishedWithError: message, this will enqueue one
+ * to be sent to it in the main thread, and cancel all other pending messages to the writeable
+ * enqueued by this object (both past and future).
+ * The error argument cannot be nil.
+ */
 - (void)cancelWithError:(NSError *)error;
 
-// Cancels all pending messages to the writeable enqueued by this object (both past and future).
-// Because the writeable won't receive writesFinishedWithError:, this also releases the writeable.
+/**
+ * Cancels all pending messages to the writeable enqueued by this object (both past and future).
+ * Because the writeable won't receive writesFinishedWithError:, this also releases the writeable.
+ */
 - (void)cancelSilently;
 @end
diff --git a/src/objective-c/RxLibrary/GRXForwardingWriter.h b/src/objective-c/RxLibrary/GRXForwardingWriter.h
index f310832284..8d45b8ed8d 100644
--- a/src/objective-c/RxLibrary/GRXForwardingWriter.h
+++ b/src/objective-c/RxLibrary/GRXForwardingWriter.h
@@ -33,17 +33,19 @@
 
 #import "GRXWriter.h"
 
-// A "proxy" class that simply forwards values, completion, and errors from its input writer to its
-// writeable.
-// It is useful as a superclass for pipes that act as a transformation of their
-// input writer, and for classes that represent objects with input and
-// output sequences of values, like an RPC.
-//
-// Thread-safety:
-// All messages sent to this object need to be serialized. When it is started, the writer it wraps
-// is started in the same thread. Manual state changes are propagated to the wrapped writer in the
-// same thread too. Importantly, all messages the wrapped writer sends to its writeable need to be
-// serialized with any message sent to this object.
+/**
+ * A "proxy" class that simply forwards values, completion, and errors from its input writer to its
+ * writeable.
+ * It is useful as a superclass for pipes that act as a transformation of their
+ * input writer, and for classes that represent objects with input and
+ * output sequences of values, like an RPC.
+ *
+ * Thread-safety:
+ * All messages sent to this object need to be serialized. When it is started, the writer it wraps
+ * is started in the same thread. Manual state changes are propagated to the wrapped writer in the
+ * same thread too. Importantly, all messages the wrapped writer sends to its writeable need to be
+ * serialized with any message sent to this object.
+ */
 @interface GRXForwardingWriter : GRXWriter
 - (instancetype)initWithWriter:(GRXWriter *)writer NS_DESIGNATED_INITIALIZER;
 @end
diff --git a/src/objective-c/RxLibrary/GRXImmediateWriter.h b/src/objective-c/RxLibrary/GRXImmediateWriter.h
index 3fcc259434..e22b056ff5 100644
--- a/src/objective-c/RxLibrary/GRXImmediateWriter.h
+++ b/src/objective-c/RxLibrary/GRXImmediateWriter.h
@@ -35,46 +35,60 @@
 
 #import "GRXWriter.h"
 
-// Utility to construct GRXWriter instances from values that are immediately available when
-// required.
-//
-// Thread-safety:
-//
-// An object of this class shouldn't be messaged concurrently by more than one thread. It will start
-// messaging the writeable before |startWithWriteable:| returns, in the same thread. That is the
-// only place where the writer can be paused or stopped prematurely.
-//
-// If a paused writer of this class is resumed, it will start messaging the writeable, in the same
-// thread, before |setState:| returns. Because the object can't be legally accessed concurrently,
-// that's the only place where it can be paused again (or stopped).
+/**
+ * Utility to construct GRXWriter instances from values that are immediately available when
+ * required.
+ *
+ * Thread-safety:
+ *
+ * An object of this class shouldn't be messaged concurrently by more than one thread. It will start
+ * messaging the writeable before |startWithWriteable:| returns, in the same thread. That is the
+ * only place where the writer can be paused or stopped prematurely.
+ *
+ * If a paused writer of this class is resumed, it will start messaging the writeable, in the same
+ * thread, before |setState:| returns. Because the object can't be legally accessed concurrently,
+ * that's the only place where it can be paused again (or stopped).
+ */
 @interface GRXImmediateWriter : GRXWriter
 
-// Returns a writer that pulls values from the passed NSEnumerator instance and pushes them to
-// its writeable. The NSEnumerator is released when it finishes.
+/**
+ * Returns a writer that pulls values from the passed NSEnumerator instance and pushes them to
+ * its writeable. The NSEnumerator is released when it finishes.
+ */
 + (GRXWriter *)writerWithEnumerator:(NSEnumerator *)enumerator;
 
-// Returns a writer that pushes to its writeable the successive values returned by the passed
-// block. When the block first returns nil, it is released.
+/**
+ * Returns a writer that pushes to its writeable the successive values returned by the passed
+ * block. When the block first returns nil, it is released.
+ */
 + (GRXWriter *)writerWithValueSupplier:(id (^)())block;
 
-// Returns a writer that iterates over the values of the passed container and pushes them to
-// its writeable. The container is released when the iteration is over.
-//
-// Note that the usual speed gain of NSFastEnumeration over NSEnumerator results from not having to
-// call one method per element. Because GRXWriteable instances accept values one by one, that speed
-// gain doesn't happen here.
+/**
+ * Returns a writer that iterates over the values of the passed container and pushes them to
+ * its writeable. The container is released when the iteration is over.
+ *
+ * Note that the usual speed gain of NSFastEnumeration over NSEnumerator results from not having to
+ * call one method per element. Because GRXWriteable instances accept values one by one, that speed
+ * gain doesn't happen here.
+ */
 + (GRXWriter *)writerWithContainer:(id<NSFastEnumeration>)container;
 
-// Returns a writer that sends the passed value to its writeable and then finishes (releasing the
-// value).
+/**
+ * Returns a writer that sends the passed value to its writeable and then finishes (releasing the
+ * value).
+ */
 + (GRXWriter *)writerWithValue:(id)value;
 
-// Returns a writer that, as part of its start method, sends the passed error to the writeable
-// (then releasing the error).
+/**
+ * Returns a writer that, as part of its start method, sends the passed error to the writeable
+ * (then releasing the error).
+ */
 + (GRXWriter *)writerWithError:(NSError *)error;
 
-// Returns a writer that, as part of its start method, finishes immediately without sending any
-// values to its writeable.
+/**
+ * Returns a writer that, as part of its start method, finishes immediately without sending any
+ * values to its writeable.
+ */
 + (GRXWriter *)emptyWriter;
 
 @end
diff --git a/src/objective-c/RxLibrary/GRXWriteable.h b/src/objective-c/RxLibrary/GRXWriteable.h
index 45613d6dd0..7fe805c663 100644
--- a/src/objective-c/RxLibrary/GRXWriteable.h
+++ b/src/objective-c/RxLibrary/GRXWriteable.h
@@ -33,16 +33,20 @@
 
 #import <Foundation/Foundation.h>
 
-// A GRXWriteable is an object to which a sequence of values can be sent. The
-// sequence finishes with an optional error.
+/**
+ * A GRXWriteable is an object to which a sequence of values can be sent. The
+ * sequence finishes with an optional error.
+ */
 @protocol GRXWriteable <NSObject>
 
-// Push the next value of the sequence to the receiving object.
+/** Push the next value of the sequence to the receiving object. */
 - (void)writeValue:(id)value;
 
-// Signal that the sequence is completed, or that an error ocurred. After this
-// message is sent to the instance, neither it nor writeValue: may be
-// called again.
+/**
+ * Signal that the sequence is completed, or that an error ocurred. After this
+ * message is sent to the instance, neither it nor writeValue: may be
+ * called again.
+ */
 - (void)writesFinishedWithError:(NSError *)errorOrNil;
 @end
 
@@ -51,8 +55,10 @@ typedef void (^GRXCompletionHandler)(NSError *errorOrNil);
 typedef void (^GRXSingleHandler)(id value, NSError *errorOrNil);
 typedef void (^GRXEventHandler)(BOOL done, id value, NSError *error);
 
-// Utility to create objects that conform to the GRXWriteable protocol, from
-// blocks that handle each of the two methods of the protocol.
+/**
+ * Utility to create objects that conform to the GRXWriteable protocol, from
+ * blocks that handle each of the two methods of the protocol.
+ */
 @interface GRXWriteable : NSObject<GRXWriteable>
 
 + (instancetype)writeableWithSingleHandler:(GRXSingleHandler)handler;
diff --git a/src/objective-c/RxLibrary/GRXWriter+Immediate.h b/src/objective-c/RxLibrary/GRXWriter+Immediate.h
index b75c0a5a64..be880151f4 100644
--- a/src/objective-c/RxLibrary/GRXWriter+Immediate.h
+++ b/src/objective-c/RxLibrary/GRXWriter+Immediate.h
@@ -35,32 +35,44 @@
 
 @interface GRXWriter (Immediate)
 
-// Returns a writer that pulls values from the passed NSEnumerator instance and pushes them to
-// its writeable. The NSEnumerator is released when it finishes.
+/**
+ * Returns a writer that pulls values from the passed NSEnumerator instance and pushes them to
+ * its writeable. The NSEnumerator is released when it finishes.
+ */
 + (instancetype)writerWithEnumerator:(NSEnumerator *)enumerator;
 
-// Returns a writer that pushes to its writeable the successive values returned by the passed
-// block. When the block first returns nil, it is released.
+/**
+ * Returns a writer that pushes to its writeable the successive values returned by the passed
+ * block. When the block first returns nil, it is released.
+ */
 + (instancetype)writerWithValueSupplier:(id (^)())block;
 
-// Returns a writer that iterates over the values of the passed container and pushes them to
-// its writeable. The container is released when the iteration is over.
-//
-// Note that the usual speed gain of NSFastEnumeration over NSEnumerator results from not having to
-// call one method per element. Because GRXWriteable instances accept values one by one, that speed
-// gain doesn't happen here.
+/**
+ * Returns a writer that iterates over the values of the passed container and pushes them to
+ * its writeable. The container is released when the iteration is over.
+ *
+ * Note that the usual speed gain of NSFastEnumeration over NSEnumerator results from not having to
+ * call one method per element. Because GRXWriteable instances accept values one by one, that speed
+ * gain doesn't happen here.
+ */
 + (instancetype)writerWithContainer:(id<NSFastEnumeration>)container;
 
-// Returns a writer that sends the passed value to its writeable and then finishes (releasing the
-// value).
+/**
+ * Returns a writer that sends the passed value to its writeable and then finishes (releasing the
+ * value).
+ */
 + (instancetype)writerWithValue:(id)value;
 
-// Returns a writer that, as part of its start method, sends the passed error to the writeable
-// (then releasing the error).
+/**
+ * Returns a writer that, as part of its start method, sends the passed error to the writeable
+ * (then releasing the error).
+ */
 + (instancetype)writerWithError:(NSError *)error;
 
-// Returns a writer that, as part of its start method, finishes immediately without sending any
-// values to its writeable.
+/**
+ * Returns a writer that, as part of its start method, finishes immediately without sending any
+ * values to its writeable.
+ */
 + (instancetype)emptyWriter;
 
 @end
diff --git a/src/objective-c/RxLibrary/GRXWriter+Transformations.h b/src/objective-c/RxLibrary/GRXWriter+Transformations.h
index 60c4da37d6..17d61e7541 100644
--- a/src/objective-c/RxLibrary/GRXWriter+Transformations.h
+++ b/src/objective-c/RxLibrary/GRXWriter+Transformations.h
@@ -35,8 +35,10 @@
 
 @interface GRXWriter (Transformations)
 
-// Returns a writer that wraps the receiver, and has all the values the receiver would write
-// transformed by the provided mapping function.
+/**
+ * Returns a writer that wraps the receiver, and has all the values the receiver would write
+ * transformed by the provided mapping function.
+ */
 - (GRXWriter *)map:(id (^)(id value))map;
 
 @end
diff --git a/src/objective-c/RxLibrary/GRXWriter.h b/src/objective-c/RxLibrary/GRXWriter.h
index b1c994aa38..ff81268446 100644
--- a/src/objective-c/RxLibrary/GRXWriter.h
+++ b/src/objective-c/RxLibrary/GRXWriter.h
@@ -35,73 +35,87 @@
 
 #import "GRXWriteable.h"
 
-// States of a writer.
+/** States of a writer. */
 typedef NS_ENUM(NSInteger, GRXWriterState) {
 
-  // The writer has not yet been given a writeable to which it can push its values. To have a writer
-  // transition to the Started state, send it a startWithWriteable: message.
-  //
-  // A writer's state cannot be manually set to this value.
+  /**
+   * The writer has not yet been given a writeable to which it can push its values. To have a writer
+   * transition to the Started state, send it a startWithWriteable: message.
+   *
+   * A writer's state cannot be manually set to this value.
+   */
   GRXWriterStateNotStarted,
 
-  // The writer might push values to the writeable at any moment.
+  /** The writer might push values to the writeable at any moment. */
   GRXWriterStateStarted,
 
-  // The writer is temporarily paused, and won't send any more values to the writeable unless its
-  // state is set back to Started. The writer might still transition to the Finished state at any
-  // moment, and is allowed to send writesFinishedWithError: to its writeable.
+  /**
+   * The writer is temporarily paused, and won't send any more values to the writeable unless its
+   * state is set back to Started. The writer might still transition to the Finished state at any
+   * moment, and is allowed to send writesFinishedWithError: to its writeable.
+   */
   GRXWriterStatePaused,
 
-  // The writer has released its writeable and won't interact with it anymore.
-  //
-  // One seldomly wants to set a writer's state to this value, as its writeable isn't notified with
-  // a writesFinishedWithError: message. Instead, sending finishWithError: to the writer will make
-  // it notify the writeable and then transition to this state.
+  /**
+   * The writer has released its writeable and won't interact with it anymore.
+   *
+   * One seldomly wants to set a writer's state to this value, as its writeable isn't notified with
+   * a writesFinishedWithError: message. Instead, sending finishWithError: to the writer will make
+   * it notify the writeable and then transition to this state.
+   */
   GRXWriterStateFinished
 };
 
-// An GRXWriter object can produce, on demand, a sequence of values. The sequence may be produced
-// asynchronously, and it may consist of any number of elements, including none or an infinite
-// number.
-//
-// GRXWriter is the active dual of NSEnumerator. The difference between them is thus whether the
-// object plays an active or passive role during usage: A user of NSEnumerator pulls values off it,
-// and passes the values to a writeable. A user of GRXWriter, though, just gives it a writeable, and
-// the GRXWriter instance pushes values to the writeable. This makes this protocol suitable to
-// represent a sequence of future values, as well as collections with internal iteration.
-//
-// An instance of GRXWriter can start producing values after a writeable is passed to it. It can
-// also be commanded to finish the sequence immediately (with an optional error). Finally, it can be
-// asked to pause, and resumed later. All GRXWriter objects support pausing and early termination.
-//
-// Thread-safety:
-//
-// State transitions take immediate effect if the object is used from a single thread. Subclasses
-// might offer stronger guarantees.
-//
-// Unless otherwise indicated by a conforming subclass, no messages should be sent concurrently to a
-// GRXWriter. I.e., conforming classes aren't required to be thread-safe.
+/**
+ * An GRXWriter object can produce, on demand, a sequence of values. The sequence may be produced
+ * asynchronously, and it may consist of any number of elements, including none or an infinite
+ * number.
+ *
+ * GRXWriter is the active dual of NSEnumerator. The difference between them is thus whether the
+ * object plays an active or passive role during usage: A user of NSEnumerator pulls values off it,
+ * and passes the values to a writeable. A user of GRXWriter, though, just gives it a writeable, and
+ * the GRXWriter instance pushes values to the writeable. This makes this protocol suitable to
+ * represent a sequence of future values, as well as collections with internal iteration.
+ *
+ * An instance of GRXWriter can start producing values after a writeable is passed to it. It can
+ * also be commanded to finish the sequence immediately (with an optional error). Finally, it can be
+ * asked to pause, and resumed later. All GRXWriter objects support pausing and early termination.
+ *
+ * Thread-safety:
+ *
+ * State transitions take immediate effect if the object is used from a single thread. Subclasses
+ * might offer stronger guarantees.
+ *
+ * Unless otherwise indicated by a conforming subclass, no messages should be sent concurrently to a
+ * GRXWriter. I.e., conforming classes aren't required to be thread-safe.
+ */
 @interface GRXWriter : NSObject
 
-// This property can be used to query the current state of the writer, which determines how it might
-// currently use its writeable. Some state transitions can be triggered by setting this property to
-// the corresponding value, and that's useful for advanced use cases like pausing an writer. For
-// more details, see the documentation of the enum further down.
+/**
+ * This property can be used to query the current state of the writer, which determines how it might
+ * currently use its writeable. Some state transitions can be triggered by setting this property to
+ * the corresponding value, and that's useful for advanced use cases like pausing an writer. For
+ * more details, see the documentation of the enum further down.
+ */
 @property(nonatomic) GRXWriterState state;
 
-// Transition to the Started state, and start sending messages to the writeable (a reference to it
-// is retained). Messages to the writeable may be sent before the method returns, or they may be
-// sent later in the future. See GRXWriteable.h for the different messages a writeable can receive.
-//
-// If this writer draws its values from an external source (e.g. from the filesystem or from a
-// server), calling this method will commonly trigger side effects (like network connections).
-//
-// This method might only be called on writers in the NotStarted state.
+/**
+ * Transition to the Started state, and start sending messages to the writeable (a reference to it
+ * is retained). Messages to the writeable may be sent before the method returns, or they may be
+ * sent later in the future. See GRXWriteable.h for the different messages a writeable can receive.
+ *
+ * If this writer draws its values from an external source (e.g. from the filesystem or from a
+ * server), calling this method will commonly trigger side effects (like network connections).
+ *
+ * This method might only be called on writers in the NotStarted state.
+ */
 - (void)startWithWriteable:(id<GRXWriteable>)writeable;
 
-// Send writesFinishedWithError:errorOrNil to the writeable. Then release the reference to it and
-// transition to the Finished state.
-//
-// This method might only be called on writers in the Started or Paused state.
+/**
+ * Send writesFinishedWithError:errorOrNil to the writeable. Then release the reference to it and
+ * transition to the Finished state.
+ *
+ * This method might only be called on writers in the Started or Paused state.
+ */
 - (void)finishWithError:(NSError *)errorOrNil;
 @end
diff --git a/src/objective-c/RxLibrary/NSEnumerator+GRXUtil.h b/src/objective-c/RxLibrary/NSEnumerator+GRXUtil.h
index 400e834c6a..0622f7067c 100644
--- a/src/objective-c/RxLibrary/NSEnumerator+GRXUtil.h
+++ b/src/objective-c/RxLibrary/NSEnumerator+GRXUtil.h
@@ -35,17 +35,23 @@
 
 @interface NSEnumerator (GRXUtil)
 
-// Returns a NSEnumerator instance that iterates through the elements of the passed container that
-// supports fast enumeration. Note that this negates the speed benefits of fast enumeration over
-// NSEnumerator. It's only intended for the rare cases when one needs the latter and only has the
-// former, e.g. for iteration that needs to be paused and resumed later.
+/**
+ * Returns a NSEnumerator instance that iterates through the elements of the passed container that
+ * supports fast enumeration. Note that this negates the speed benefits of fast enumeration over
+ * NSEnumerator. It's only intended for the rare cases when one needs the latter and only has the
+ * former, e.g. for iteration that needs to be paused and resumed later.
+ */
 + (NSEnumerator *)grx_enumeratorWithContainer:(id<NSFastEnumeration>)container;
 
-// Returns a NSEnumerator instance that provides a single object before finishing. The value is then
-// released.
+/**
+ * Returns a NSEnumerator instance that provides a single object before finishing. The value is then
+ * released.
+ */
 + (NSEnumerator *)grx_enumeratorWithSingleValue:(id)value;
 
-// Returns a NSEnumerator instance that delegates the invocations of nextObject to the passed block.
-// When the block first returns nil, it is released.
+/**
+ * Returns a NSEnumerator instance that delegates the invocations of nextObject to the passed block.
+ * When the block first returns nil, it is released.
+ */
 + (NSEnumerator *)grx_enumeratorWithValueSupplier:(id (^)())block;
 @end
diff --git a/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.h b/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.h
index 34cfc4d8a7..fb50c37863 100644
--- a/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.h
+++ b/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.h
@@ -33,10 +33,14 @@
 
 #import <Foundation/Foundation.h>
 
-// Concrete subclass of NSEnumerator that delegates the invocations of nextObject to a block passed
-// on initialization.
+/**
+ * Concrete subclass of NSEnumerator that delegates the invocations of nextObject to a block passed
+ * on initialization.
+ */
 @interface GRXNSBlockEnumerator : NSEnumerator
-// The first time the passed block returns nil, the enumeration will end and the block will be
-// released.
+/**
+ * The first time the passed block returns nil, the enumeration will end and the block will be
+ * released.
+ */
 - (instancetype)initWithValueSupplier:(id (^)())block;
 @end
diff --git a/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.h b/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.h
index 1565029205..62c27dbc7f 100644
--- a/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.h
+++ b/src/objective-c/RxLibrary/private/GRXNSFastEnumerator.h
@@ -33,11 +33,15 @@
 
 #import <Foundation/Foundation.h>
 
-// This is a bridge to interact through NSEnumerator's interface with objects that only conform to
-// NSFastEnumeration. (There's nothing specifically fast about it - you certainly don't win any
-// speed by using this instead of a NSEnumerator provided by your container).
+/**
+ * This is a bridge to interact through NSEnumerator's interface with objects that only conform to
+ * NSFastEnumeration. (There's nothing specifically fast about it - you certainly don't win any
+ * speed by using this instead of a NSEnumerator provided by your container).
+ */
 @interface GRXNSFastEnumerator : NSEnumerator
-// After the iteration of the container (via the NSFastEnumeration protocol) is over, the container
-// is released. If the container is modified during enumeration, an exception is thrown.
+/**
+ * After the iteration of the container (via the NSFastEnumeration protocol) is over, the container
+ * is released. If the container is modified during enumeration, an exception is thrown.
+ */
 - (instancetype)initWithContainer:(id<NSFastEnumeration>)container;
 @end
diff --git a/src/objective-c/RxLibrary/private/GRXNSScalarEnumerator.h b/src/objective-c/RxLibrary/private/GRXNSScalarEnumerator.h
index 12aa51e213..24a21a1b22 100644
--- a/src/objective-c/RxLibrary/private/GRXNSScalarEnumerator.h
+++ b/src/objective-c/RxLibrary/private/GRXNSScalarEnumerator.h
@@ -33,9 +33,11 @@
 
 #import <Foundation/Foundation.h>
 
-// Concrete subclass of NSEnumerator whose instances return a single object before finishing.
+/** Concrete subclass of NSEnumerator whose instances return a single object before finishing. */
 @interface GRXNSScalarEnumerator : NSEnumerator
-// Param value: the single object this instance will produce. After the first invocation of
-// nextObject, the value is released.
+/**
+ * Param value: the single object this instance will produce. After the first invocation of
+ * nextObject, the value is released.
+ */
 - (instancetype)initWithValue:(id)value;
 @end
diff --git a/src/objective-c/RxLibrary/transformations/GRXMappingWriter.h b/src/objective-c/RxLibrary/transformations/GRXMappingWriter.h
index 43b8706864..01a15e2a43 100644
--- a/src/objective-c/RxLibrary/transformations/GRXMappingWriter.h
+++ b/src/objective-c/RxLibrary/transformations/GRXMappingWriter.h
@@ -33,7 +33,7 @@
 
 #import "RxLibrary/GRXForwardingWriter.h"
 
-// A "proxy" writer that transforms all the values of its input writer by using a mapping function.
+/** A "proxy" writer that transforms all the values of its input writer by using a mapping function. */
 @interface GRXMappingWriter : GRXForwardingWriter
 - (instancetype)initWithWriter:(GRXWriter *)writer map:(id (^)(id value))map
     NS_DESIGNATED_INITIALIZER;
diff --git a/src/objective-c/change-comments.py b/src/objective-c/change-comments.py
new file mode 100755
index 0000000000..9aa0e0c9f5
--- /dev/null
+++ b/src/objective-c/change-comments.py
@@ -0,0 +1,128 @@
+#!/usr/bin/env python2.7
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Change comments style of source files from // to /** */"""
+
+import re
+import sys
+
+
+if len(sys.argv) < 2:
+  print("Please provide at least one source file name as argument.")
+  sys.exit()
+
+for file_name in sys.argv[1:]:
+
+  print("Modifying format of {file} comments in place...".format(
+      file=file_name,
+  ))
+
+
+  # Input
+
+  with open(file_name, "r") as input_file:
+    lines = input_file.readlines()
+
+  def peek():
+    return lines[0]
+
+  def read_line():
+    return lines.pop(0)
+
+  def more_input_available():
+    return lines
+
+
+  # Output
+
+  output_lines = []
+
+  def write(line):
+    output_lines.append(line)
+
+  def flush_output():
+    with open(file_name, "w") as output_file:
+      for line in output_lines:
+        output_file.write(line)
+
+
+  # Pattern matching
+
+  comment_regex = r'^(\s*)//\s(.*)$'
+
+  def is_comment(line):
+    return re.search(comment_regex, line)
+
+  def isnt_comment(line):
+    return not is_comment(line)
+
+  def next_line(predicate):
+    return more_input_available() and predicate(peek())
+
+
+  # Transformation
+
+  def indentation_of(line):
+    match = re.search(comment_regex, line)
+    return match.group(1)
+
+  def content(line):
+    match = re.search(comment_regex, line)
+    return match.group(2)
+
+  def format_as_block(comment_block):
+    if len(comment_block) == 0:
+      return []
+
+    indent = indentation_of(comment_block[0])
+
+    if len(comment_block) == 1:
+      return [indent + "/** " + content(comment_block[0]) + " */\n"]
+
+    block = ["/**"] + [" * " + content(line) for line in comment_block] + [" */"]
+    return [indent + line.rstrip() + "\n" for line in block]
+
+
+  # Main algorithm
+
+  while more_input_available():
+    while next_line(isnt_comment):
+      write(read_line())
+
+    comment_block = []
+    # Get all lines in the same comment block. We could restrict the indentation
+    # to be the same as the first line of the block, but it's probably ok.
+    while (next_line(is_comment)):
+      comment_block.append(read_line())
+
+    for line in format_as_block(comment_block):
+      write(line)
+
+  flush_output()
diff --git a/src/objective-c/examples/Sample/Podfile b/src/objective-c/examples/Sample/Podfile
index 72308c1619..3b2f412569 100644
--- a/src/objective-c/examples/Sample/Podfile
+++ b/src/objective-c/examples/Sample/Podfile
@@ -1,8 +1,9 @@
 source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 
+pod 'Protobuf', :path => "../../../../third_party/protobuf"
 pod 'gRPC', :path => "../../../.."
-pod 'RemoteTest', :path => "../../generated_libraries/RemoteTestClient"
+pod 'RemoteTest', :path => "../RemoteTestClient"
 
 target 'Sample' do
 end
diff --git a/src/objective-c/examples/Sample/Sample/ViewController.m b/src/objective-c/examples/Sample/Sample/ViewController.m
index 05bd6fa2db..3d634a340d 100644
--- a/src/objective-c/examples/Sample/Sample/ViewController.m
+++ b/src/objective-c/examples/Sample/Sample/ViewController.m
@@ -34,7 +34,7 @@
 #import "ViewController.h"
 
 #import <GRPCClient/GRPCCall.h>
-#import <GRPCClient/GRPCMethodName.h>
+#import <ProtoRPC/ProtoMethod.h>
 #import <RemoteTest/Messages.pbobjc.h>
 #import <RemoteTest/Test.pbrpc.h>
 #import <RxLibrary/GRXWriter+Immediate.h>
@@ -66,14 +66,14 @@
 
   // Same example call using the generic gRPC client library:
 
-  GRPCMethodName *method = [[GRPCMethodName alloc] initWithPackage:@"grpc.testing"
-                                                         interface:@"TestService"
-                                                            method:@"UnaryCall"];
+  ProtoMethod *method = [[ProtoMethod alloc] initWithPackage:@"grpc.testing"
+                                                     service:@"TestService"
+                                                      method:@"UnaryCall"];
 
-  id<GRXWriter> requestsWriter = [GRXWriter writerWithValue:[request data]];
+  GRXWriter *requestsWriter = [GRXWriter writerWithValue:[request data]];
 
   GRPCCall *call = [[GRPCCall alloc] initWithHost:kRemoteHost
-                                           method:method
+                                             path:method.HTTPPath
                                    requestsWriter:requestsWriter];
 
   id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {
diff --git a/src/objective-c/format-all-comments.sh b/src/objective-c/format-all-comments.sh
new file mode 100644
index 0000000000..e6b6b5a0b4
--- /dev/null
+++ b/src/objective-c/format-all-comments.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+find . -type f -name "*.h" ! -path "*/Pods/*" ! -path "./generated_libraries/*" ! -path "./examples/*" ! -path "./tests/*" | xargs ./change-comments.py
diff --git a/src/objective-c/generated_libraries/RouteGuideClient/RouteGuide.podspec b/src/objective-c/generated_libraries/RouteGuideClient/RouteGuide.podspec
deleted file mode 100644
index 23ccffe69d..0000000000
--- a/src/objective-c/generated_libraries/RouteGuideClient/RouteGuide.podspec
+++ /dev/null
@@ -1,31 +0,0 @@
-Pod::Spec.new do |s|
-  s.name     = "RouteGuide"
-  s.version  = "0.0.1"
-  s.license  = "New BSD"
-
-  s.ios.deployment_target = "6.0"
-  s.osx.deployment_target = "10.8"
-
-  # Run protoc with the Objective-C and gRPC plugins to generate protocol messages and gRPC clients.
-  s.prepare_command = <<-CMD
-    BINDIR=../../../../bins/$CONFIG
-    PROTOC=$BINDIR/protobuf/protoc
-    PLUGIN=$BINDIR/grpc_objective_c_plugin
-    $PROTOC --plugin=protoc-gen-grpc=$PLUGIN --objc_out=. --grpc_out=. *.proto
-  CMD
-
-  s.subspec "Messages" do |ms|
-    ms.source_files = "*.pbobjc.{h,m}"
-    ms.header_mappings_dir = "."
-    ms.requires_arc = false
-    ms.dependency "Protobuf", "~> 3.0.0-alpha-3"
-  end
-
-  s.subspec "Services" do |ss|
-    ss.source_files = "*.pbrpc.{h,m}"
-    ss.header_mappings_dir = "."
-    ss.requires_arc = true
-    ss.dependency "gRPC", "~> 0.5"
-    ss.dependency "#{s.name}/Messages"
-  end
-end
diff --git a/src/objective-c/generated_libraries/RouteGuideClient/route_guide.proto b/src/objective-c/generated_libraries/RouteGuideClient/route_guide.proto
deleted file mode 100644
index 19592e2ebd..0000000000
--- a/src/objective-c/generated_libraries/RouteGuideClient/route_guide.proto
+++ /dev/null
@@ -1,120 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-syntax = "proto3";
-
-package routeguide;
-
-option objc_class_prefix = "RGD";
-
-// Interface exported by the server.
-service RouteGuide {
-  // A simple RPC.
-  //
-  // Obtains the feature at a given position.
-  rpc GetFeature(Point) returns (Feature) {}
-
-  // A server-to-client streaming RPC.
-  //
-  // Obtains the Features available within the given Rectangle.  Results are
-  // streamed rather than returned at once (e.g. in a response message with a
-  // repeated field), as the rectangle may cover a large area and contain a
-  // huge number of features.
-  rpc ListFeatures(Rectangle) returns (stream Feature) {}
-
-  // A client-to-server streaming RPC.
-  //
-  // Accepts a stream of Points on a route being traversed, returning a
-  // RouteSummary when traversal is completed.
-  rpc RecordRoute(stream Point) returns (RouteSummary) {}
-
-  // A Bidirectional streaming RPC.
-  //
-  // Accepts a stream of RouteNotes sent while a route is being traversed,
-  // while receiving other RouteNotes (e.g. from other users).
-  rpc RouteChat(stream RouteNote) returns (stream RouteNote) {}
-}
-
-// Points are represented as latitude-longitude pairs in the E7 representation
-// (degrees multiplied by 10**7 and rounded to the nearest integer).
-// Latitudes should be in the range +/- 90 degrees and longitude should be in
-// the range +/- 180 degrees (inclusive).
-message Point {
-  int32 latitude = 1;
-  int32 longitude = 2;
-}
-
-// A latitude-longitude rectangle, represented as two diagonally opposite
-// points "lo" and "hi".
-message Rectangle {
-  // One corner of the rectangle.
-  Point lo = 1;
-
-  // The other corner of the rectangle.
-  Point hi = 2;
-}
-
-// A feature names something at a given point.
-//
-// If a feature could not be named, the name is empty.
-message Feature {
-  // The name of the feature.
-  string name = 1;
-
-  // The point where the feature is detected.
-  Point location = 2;
-}
-
-// A RouteNote is a message sent while at a given point.
-message RouteNote {
-  // The location from which the message is sent.
-  Point location = 1;
-
-  // The message to be sent.
-  string message = 2;
-}
-
-// A RouteSummary is received in response to a RecordRoute rpc.
-//
-// It contains the number of individual points received, the number of
-// detected features, and the total distance covered as the cumulative sum of
-// the distance between each point.
-message RouteSummary {
-  // The number of points received.
-  int32 point_count = 1;
-
-  // The number of known features passed while traversing the route.
-  int32 feature_count = 2;
-
-  // The distance covered in metres.
-  int32 distance = 3;
-
-  // The duration of the traversal in seconds.
-  int32 elapsed_time = 4;
-}
diff --git a/src/objective-c/tests/GRPCClientTests.m b/src/objective-c/tests/GRPCClientTests.m
index 09a55e0704..00c4b8830d 100644
--- a/src/objective-c/tests/GRPCClientTests.m
+++ b/src/objective-c/tests/GRPCClientTests.m
@@ -42,9 +42,6 @@
 #import <RxLibrary/GRXWriteable.h>
 #import <RxLibrary/GRXWriter+Immediate.h>
 
-// These are a few tests similar to InteropTests, but which use the generic gRPC client (GRPCCall)
-// rather than a generated proto library on top of it.
-
 static NSString * const kHostAddress = @"localhost:5050";
 static NSString * const kPackage = @"grpc.testing";
 static NSString * const kService = @"TestService";
@@ -53,11 +50,10 @@ static ProtoMethod *kInexistentMethod;
 static ProtoMethod *kEmptyCallMethod;
 static ProtoMethod *kUnaryCallMethod;
 
-// This is an observer class for testing that responseMetadata is KVO-compliant
-
+/** Observer class for testing that responseMetadata is KVO-compliant */
 @interface PassthroughObserver : NSObject
-
-- (instancetype) initWithCallback:(void (^)(NSString*, id, NSDictionary*))callback;
+- (instancetype) initWithCallback:(void (^)(NSString*, id, NSDictionary*))callback
+    NS_DESIGNATED_INITIALIZER;
 
 - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change
                        context:(void *)context;
@@ -67,23 +63,38 @@ static ProtoMethod *kUnaryCallMethod;
   void (^_callback)(NSString*, id, NSDictionary*);
 }
 
+- (instancetype)init {
+  return [self initWithCallback:nil];
+}
+
 - (instancetype)initWithCallback:(void (^)(NSString *, id, NSDictionary *))callback {
-  self = [super init];
-  if (self) {
+  if (!callback) {
+    return nil;
+  }
+  if ((self = [super init])) {
     _callback = callback;
   }
   return self;
-  
 }
 
-- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
-{
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(id)object
+                        change:(NSDictionary *)change
+                       context:(void *)context {
   _callback(keyPath, object, change);
   [object removeObserver:self forKeyPath:keyPath];
 }
 
 @end
 
+# pragma mark Tests
+
+/**
+ * A few tests similar to InteropTests, but which use the generic gRPC client (GRPCCall) rather than
+ * a generated proto library on top of it. Its RPCs are sent to a local cleartext server.
+ *
+ * TODO(jcanizales): Run them also against a local SSL server and against a remote server.
+ */
 @interface GRPCClientTests : XCTestCase
 @end
 
@@ -180,6 +191,7 @@ static ProtoMethod *kUnaryCallMethod;
   [self waitForExpectationsWithTimeout:8 handler:nil];
 }
 
+// TODO(jcanizales): Activate this test against the remote server.
 - (void)testMetadata {
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"RPC unauthorized."];
 
diff --git a/src/objective-c/tests/InteropTests.h b/src/objective-c/tests/InteropTests.h
index 1045c3d124..6d54343b13 100644
--- a/src/objective-c/tests/InteropTests.h
+++ b/src/objective-c/tests/InteropTests.h
@@ -33,11 +33,17 @@
 
 #import <XCTest/XCTest.h>
 
-// Implements tests as described here:
-// https://github.com/grpc/grpc/blob/master/doc/interop-test-descriptions.md
-
+/**
+ * Implements tests as described here:
+ * https://github.com/grpc/grpc/blob/master/doc/interop-test-descriptions.md
+ *
+ * This is an abstract class that needs to be subclassed. See |+host|.
+ */
 @interface InteropTests : XCTestCase
-// Returns @"grpc-test.sandbox.google.com".
-// Override in a subclass to perform the same tests against a different address.
+/**
+ * Host to send the RPCs to. The base implementation returns nil, which would make all tests to
+ * fail.
+ * Override in a subclass to perform these tests against a specific address.
+ */
 + (NSString *)host;
 @end
diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index af58e2bd04..26877b1ae8 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -78,21 +78,20 @@
 
 #pragma mark Tests
 
-static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.google.com";
-
 @implementation InteropTests {
   RMTTestService *_service;
 }
 
 + (NSString *)host {
-  return kRemoteSSLHost;
+  return nil;
 }
 
 - (void)setUp {
-  _service = [RMTTestService serviceWithHost:self.class.host];
+  _service = self.class.host ? [RMTTestService serviceWithHost:self.class.host] : nil;
 }
 
 - (void)testEmptyUnaryRPC {
+  XCTAssertNotNil(self.class.host);
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"EmptyUnary"];
 
   RMTEmpty *request = [RMTEmpty message];
@@ -110,6 +109,7 @@ static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.google.com";
 }
 
 - (void)testLargeUnaryRPC {
+  XCTAssertNotNil(self.class.host);
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"LargeUnary"];
 
   RMTSimpleRequest *request = [RMTSimpleRequest message];
@@ -132,6 +132,7 @@ static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.google.com";
 }
 
 - (void)testClientStreamingRPC {
+  XCTAssertNotNil(self.class.host);
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"ClientStreaming"];
 
   RMTStreamingInputCallRequest *request1 = [RMTStreamingInputCallRequest message];
@@ -164,6 +165,7 @@ static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.google.com";
 }
 
 - (void)testServerStreamingRPC {
+  XCTAssertNotNil(self.class.host);
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"ServerStreaming"];
 
   NSArray *expectedSizes = @[@31415, @9, @2653, @58979];
@@ -200,6 +202,7 @@ static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.google.com";
 }
 
 - (void)testPingPongRPC {
+  XCTAssertNotNil(self.class.host);
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"PingPong"];
 
   NSArray *requests = @[@27182, @8, @1828, @45904];
@@ -243,6 +246,7 @@ static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.google.com";
 }
 
 - (void)testEmptyStreamRPC {
+  XCTAssertNotNil(self.class.host);
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"EmptyStream"];
   [_service fullDuplexCallWithRequestsWriter:[GRXWriter emptyWriter]
                                 eventHandler:^(BOOL done,
@@ -256,6 +260,7 @@ static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.google.com";
 }
 
 - (void)testCancelAfterBeginRPC {
+  XCTAssertNotNil(self.class.host);
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"CancelAfterBegin"];
 
   // A buffered pipe to which we never write any value acts as a writer that just hangs.
@@ -273,6 +278,7 @@ static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.google.com";
 }
 
 - (void)testCancelAfterFirstResponseRPC {
+  XCTAssertNotNil(self.class.host);
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"CancelAfterFirstResponse"];
 
   // A buffered pipe to which we write a single value but never close
diff --git a/src/objective-c/tests/InteropTestsLocalCleartext.m b/src/objective-c/tests/InteropTestsLocalCleartext.m
index 2d7d3c4b2c..56927a8af6 100644
--- a/src/objective-c/tests/InteropTestsLocalCleartext.m
+++ b/src/objective-c/tests/InteropTestsLocalCleartext.m
@@ -31,15 +31,13 @@
  *
  */
 
-// Repeat of the tests in InteropTests.m, but sending the RPCs to a local cleartext server instead
-// of the remote SSL one.
-
 #import <GRPCClient/GRPCCall+Tests.h>
 
 #import "InteropTests.h"
 
 static NSString * const kLocalCleartextHost = @"localhost:5050";
 
+/** Tests in InteropTests.m, sending the RPCs to a local cleartext server. */
 @interface InteropTestsLocalCleartext : InteropTests
 @end
 
diff --git a/src/objective-c/tests/InteropTestsLocalSSL.m b/src/objective-c/tests/InteropTestsLocalSSL.m
index f69f806dcf..9d7afefbfe 100644
--- a/src/objective-c/tests/InteropTestsLocalSSL.m
+++ b/src/objective-c/tests/InteropTestsLocalSSL.m
@@ -31,15 +31,13 @@
  *
  */
 
-// Repeat of the tests in InteropTests.m, but sending the RPCs to a local SSL server instead of the
-// remote one.
-
 #import <GRPCClient/GRPCCall+Tests.h>
 
 #import "InteropTests.h"
 
 static NSString * const kLocalSSLHost = @"localhost:5051";
 
+/** Tests in InteropTests.m, sending the RPCs to a local SSL server. */
 @interface InteropTestsLocalSSL : InteropTests
 @end
 
diff --git a/src/objective-c/tests/InteropTestsRemote.m b/src/objective-c/tests/InteropTestsRemote.m
new file mode 100644
index 0000000000..a67be98431
--- /dev/null
+++ b/src/objective-c/tests/InteropTestsRemote.m
@@ -0,0 +1,50 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#import <GRPCClient/GRPCCall+Tests.h>
+
+#import "InteropTests.h"
+
+static NSString * const kRemoteSSLHost = @"grpc-test.sandbox.google.com";
+
+/** Tests in InteropTests.m, sending the RPCs to a remote SSL server. */
+@interface InteropTestsRemote : InteropTests
+@end
+
+@implementation InteropTestsRemote
+
++ (NSString *)host {
+  return kRemoteSSLHost;
+}
+
+@end
diff --git a/src/objective-c/tests/LocalClearTextTests.m b/src/objective-c/tests/LocalClearTextTests.m
deleted file mode 100644
index 976fff55bc..0000000000
--- a/src/objective-c/tests/LocalClearTextTests.m
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#import <UIKit/UIKit.h>
-#import <XCTest/XCTest.h>
-
-#import <GRPCClient/GRPCCall.h>
-#import <ProtoRPC/ProtoMethod.h>
-#import <RouteGuide/RouteGuide.pbobjc.h>
-#import <RouteGuide/RouteGuide.pbrpc.h>
-#import <RxLibrary/GRXWriteable.h>
-#import <RxLibrary/GRXWriter+Immediate.h>
-
-// These tests require a gRPC "RouteGuide" sample server to be running locally. You can compile and
-// run one by following the instructions here: https://github.com/grpc/grpc/blob/master/examples/cpp/cpptutorial.md#try-it-out
-// Be sure to have the C gRPC library installed in your system (for example, by having followed the
-// instructions at https://github.com/grpc/homebrew-grpc
-
-static NSString * const kRouteGuideHost = @"http://localhost:50051";
-static NSString * const kPackage = @"routeguide";
-static NSString * const kService = @"RouteGuide";
-
-@interface LocalClearTextTests : XCTestCase
-@end
-
-@implementation LocalClearTextTests
-
-// This test currently fails: see Issue #1907.
-//- (void)testConnectionToLocalServer {
-//  __weak XCTestExpectation *expectation = [self expectationWithDescription:@"Server reachable."];
-//
-//  // This method isn't implemented by the local server.
-//  GRPCMethodName *method = [[GRPCMethodName alloc] initWithPackage:kPackage
-//                                                         interface:kService
-//                                                            method:@"EmptyCall"];
-//
-//  GRXWriter *requestsWriter = [GRXWriter writerWithValue:[NSData data]];
-//
-//  GRPCCall *call = [[GRPCCall alloc] initWithHost:kRouteGuideHost
-//                                           method:method
-//                                   requestsWriter:requestsWriter];
-//
-//  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {
-//    XCTFail(@"Received unexpected response: %@", value);
-//  } completionHandler:^(NSError *errorOrNil) {
-//    XCTAssertNotNil(errorOrNil, @"Finished without error!");
-//    XCTAssertEqual(errorOrNil.code, 12, @"Finished with unexpected error: %@", errorOrNil);
-//    [expectation fulfill];
-//  }];
-//
-//  [call startWithWriteable:responsesWriteable];
-//
-//  [self waitForExpectationsWithTimeout:8.0 handler:nil];
-//}
-
-- (void)testEmptyRPC {
-  __weak XCTestExpectation *response = [self expectationWithDescription:@"Empty response received."];
-  __weak XCTestExpectation *completion = [self expectationWithDescription:@"Empty RPC completed."];
-
-  ProtoMethod *method = [[ProtoMethod alloc] initWithPackage:kPackage
-                                                     service:kService
-                                                      method:@"RecordRoute"];
-
-  GRXWriter *requestsWriter = [GRXWriter emptyWriter];
-
-  GRPCCall *call = [[GRPCCall alloc] initWithHost:kRouteGuideHost
-                                             path:method.HTTPPath
-                                   requestsWriter:requestsWriter];
-
-  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {
-    XCTAssertNotNil(value, @"nil value received as response.");
-    XCTAssertEqual([value length], 0, @"Non-empty response received: %@", value);
-    [response fulfill];
-  } completionHandler:^(NSError *errorOrNil) {
-    XCTAssertNil(errorOrNil, @"Finished with unexpected error: %@", errorOrNil);
-    [completion fulfill];
-  }];
-
-  [call startWithWriteable:responsesWriteable];
-
-  [self waitForExpectationsWithTimeout:2.0 handler:nil];
-}
-
-- (void)testSimpleProtoRPC {
-  __weak XCTestExpectation *response = [self expectationWithDescription:@"Response received."];
-  __weak XCTestExpectation *completion = [self expectationWithDescription:@"RPC completed."];
-
-  ProtoMethod *method = [[ProtoMethod alloc] initWithPackage:kPackage
-                                                     service:kService
-                                                      method:@"GetFeature"];
-
-  RGDPoint *point = [RGDPoint message];
-  point.latitude = 28E7;
-  point.longitude = -15E7;
-  GRXWriter *requestsWriter = [GRXWriter writerWithValue:[point data]];
-
-  GRPCCall *call = [[GRPCCall alloc] initWithHost:kRouteGuideHost
-                                             path:method.HTTPPath
-                                   requestsWriter:requestsWriter];
-
-  id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) {
-    XCTAssertNotNil(value, @"nil value received as response.");
-    RGDFeature *feature = [RGDFeature parseFromData:value error:NULL];
-    XCTAssertEqualObjects(point, feature.location);
-    XCTAssertNotNil(feature.name, @"Response's name is nil.");
-    [response fulfill];
-  } completionHandler:^(NSError *errorOrNil) {
-    XCTAssertNil(errorOrNil, @"Finished with unexpected error: %@", errorOrNil);
-    [completion fulfill];
-  }];
-
-  [call startWithWriteable:responsesWriteable];
-
-  [self waitForExpectationsWithTimeout:2.0 handler:nil];
-}
-
-- (void)testSimpleProtoRPCUsingGeneratedService {
-  __weak XCTestExpectation *completion = [self expectationWithDescription:@"RPC completed."];
-
-  RGDPoint *point = [RGDPoint message];
-  point.latitude = 28E7;
-  point.longitude = -15E7;
-
-  RGDRouteGuide *service = [[RGDRouteGuide alloc] initWithHost:kRouteGuideHost];
-  [service getFeatureWithRequest:point handler:^(RGDFeature *response, NSError *error) {
-    XCTAssertNil(error, @"Finished with unexpected error: %@", error);
-    XCTAssertEqualObjects(point, response.location);
-    XCTAssertNotNil(response.name, @"Response's name is nil.");
-    [completion fulfill];
-  }];
-
-  [self waitForExpectationsWithTimeout:2.0 handler:nil];
-}
-@end
diff --git a/src/objective-c/tests/Podfile b/src/objective-c/tests/Podfile
index 2aa837f764..cab608d37f 100644
--- a/src/objective-c/tests/Podfile
+++ b/src/objective-c/tests/Podfile
@@ -3,13 +3,28 @@ platform :ios, '8.0'
 
 pod 'Protobuf', :path => "../../../third_party/protobuf"
 pod 'gRPC', :path => "../../.."
-pod 'RemoteTest', :path => "../generated_libraries/RemoteTestClient"
-pod 'RouteGuide', :path => "../generated_libraries/RouteGuideClient"
+pod 'RemoteTest', :path => "RemoteTestClient"
 
-link_with 'AllTests'
+link_with 'AllTests',
+          'RxLibraryUnitTests',
+          'InteropTests',
+          'InteropTestsLocalSSL',
+          'InteropTestsLocalCleartext'
 
 target 'Tests' do
 end
 
 target 'AllTests' do
 end
+
+target 'RxLibraryUnitTests' do
+end
+
+target 'InteropTestsRemote' do
+end
+
+target 'InteropTestsLocalSSL' do
+end
+
+target 'InteropTestsLocalCleartext' do
+end
diff --git a/src/objective-c/generated_libraries/RemoteTestClient/RemoteTest.podspec b/src/objective-c/tests/RemoteTestClient/RemoteTest.podspec
index 8710753e59..8710753e59 100644
--- a/src/objective-c/generated_libraries/RemoteTestClient/RemoteTest.podspec
+++ b/src/objective-c/tests/RemoteTestClient/RemoteTest.podspec
diff --git a/src/objective-c/generated_libraries/RemoteTestClient/empty.proto b/src/objective-c/tests/RemoteTestClient/empty.proto
index a678048289..a678048289 100644
--- a/src/objective-c/generated_libraries/RemoteTestClient/empty.proto
+++ b/src/objective-c/tests/RemoteTestClient/empty.proto
diff --git a/src/objective-c/generated_libraries/RemoteTestClient/messages.proto b/src/objective-c/tests/RemoteTestClient/messages.proto
index 85d93c2ff9..85d93c2ff9 100644
--- a/src/objective-c/generated_libraries/RemoteTestClient/messages.proto
+++ b/src/objective-c/tests/RemoteTestClient/messages.proto
diff --git a/src/objective-c/generated_libraries/RemoteTestClient/test.proto b/src/objective-c/tests/RemoteTestClient/test.proto
index 514c3b8095..514c3b8095 100644
--- a/src/objective-c/generated_libraries/RemoteTestClient/test.proto
+++ b/src/objective-c/tests/RemoteTestClient/test.proto
diff --git a/src/objective-c/tests/Tests.xcodeproj/project.pbxproj b/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
index 3a1c3d940a..b0429617c0 100644
--- a/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
+++ b/src/objective-c/tests/Tests.xcodeproj/project.pbxproj
@@ -7,16 +7,33 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		036D953EE34B1FD523647ACD /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 35F2B6BF3BAE8F0DC4AFD76E /* libPods.a */; };
+		08A8BB02D19A53D902B214B8 /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 35F2B6BF3BAE8F0DC4AFD76E /* libPods.a */; };
+		50267643BA114A2A724D4FDF /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 35F2B6BF3BAE8F0DC4AFD76E /* libPods.a */; };
 		6312AE4E1B1BF49B00341DEE /* GRPCClientTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 6312AE4D1B1BF49B00341DEE /* GRPCClientTests.m */; };
-		63175DFF1B1B9FAF00027841 /* LocalClearTextTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 63175DFE1B1B9FAF00027841 /* LocalClearTextTests.m */; };
 		63423F4A1B150A5F006CF63C /* libTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 635697C71B14FC11007A7283 /* libTests.a */; };
-		63423F511B151B77006CF63C /* RxLibraryUnitTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 63423F501B151B77006CF63C /* RxLibraryUnitTests.m */; };
 		635697CD1B14FC11007A7283 /* Tests.m in Sources */ = {isa = PBXBuildFile; fileRef = 635697CC1B14FC11007A7283 /* Tests.m */; };
 		635ED2EC1B1A3BC400FDE5C3 /* InteropTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 635ED2EB1B1A3BC400FDE5C3 /* InteropTests.m */; };
 		63715F561B780C020029CB0B /* InteropTestsLocalCleartext.m in Sources */ = {isa = PBXBuildFile; fileRef = 63715F551B780C020029CB0B /* InteropTestsLocalCleartext.m */; };
+		6379CC4D1BE1662A001BC0A1 /* InteropTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 635ED2EB1B1A3BC400FDE5C3 /* InteropTests.m */; settings = {ASSET_TAGS = (); }; };
+		6379CC4E1BE1662B001BC0A1 /* InteropTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 635ED2EB1B1A3BC400FDE5C3 /* InteropTests.m */; settings = {ASSET_TAGS = (); }; };
+		6379CC501BE16703001BC0A1 /* InteropTestsRemote.m in Sources */ = {isa = PBXBuildFile; fileRef = 6379CC4F1BE16703001BC0A1 /* InteropTestsRemote.m */; settings = {ASSET_TAGS = (); }; };
+		6379CC511BE1683B001BC0A1 /* InteropTestsRemote.m in Sources */ = {isa = PBXBuildFile; fileRef = 6379CC4F1BE16703001BC0A1 /* InteropTestsRemote.m */; settings = {ASSET_TAGS = (); }; };
+		6379CC531BE17709001BC0A1 /* TestCertificates.bundle in Resources */ = {isa = PBXBuildFile; fileRef = 63E240CF1B6C63DC005F3B0E /* TestCertificates.bundle */; settings = {ASSET_TAGS = (); }; };
+		63DC84181BE15179000708E8 /* libTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 635697C71B14FC11007A7283 /* libTests.a */; settings = {ASSET_TAGS = (); }; };
+		63DC841E1BE15180000708E8 /* RxLibraryUnitTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 63423F501B151B77006CF63C /* RxLibraryUnitTests.m */; settings = {ASSET_TAGS = (); }; };
+		63DC84281BE15267000708E8 /* libTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 635697C71B14FC11007A7283 /* libTests.a */; settings = {ASSET_TAGS = (); }; };
+		63DC842E1BE15278000708E8 /* RxLibraryUnitTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 63423F501B151B77006CF63C /* RxLibraryUnitTests.m */; settings = {ASSET_TAGS = (); }; };
+		63DC842F1BE1527D000708E8 /* InteropTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 635ED2EB1B1A3BC400FDE5C3 /* InteropTests.m */; settings = {ASSET_TAGS = (); }; };
+		63DC84391BE15294000708E8 /* libTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 635697C71B14FC11007A7283 /* libTests.a */; settings = {ASSET_TAGS = (); }; };
+		63DC84481BE152B5000708E8 /* libTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 635697C71B14FC11007A7283 /* libTests.a */; settings = {ASSET_TAGS = (); }; };
+		63DC844E1BE15350000708E8 /* InteropTestsLocalCleartext.m in Sources */ = {isa = PBXBuildFile; fileRef = 63715F551B780C020029CB0B /* InteropTestsLocalCleartext.m */; settings = {ASSET_TAGS = (); }; };
+		63DC844F1BE15353000708E8 /* InteropTestsLocalSSL.m in Sources */ = {isa = PBXBuildFile; fileRef = 63E240CD1B6C4E2B005F3B0E /* InteropTestsLocalSSL.m */; settings = {ASSET_TAGS = (); }; };
+		63DC84501BE153AA000708E8 /* GRPCClientTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 6312AE4D1B1BF49B00341DEE /* GRPCClientTests.m */; settings = {ASSET_TAGS = (); }; };
 		63E240CE1B6C4E2B005F3B0E /* InteropTestsLocalSSL.m in Sources */ = {isa = PBXBuildFile; fileRef = 63E240CD1B6C4E2B005F3B0E /* InteropTestsLocalSSL.m */; };
 		63E240D01B6C63DC005F3B0E /* TestCertificates.bundle in Resources */ = {isa = PBXBuildFile; fileRef = 63E240CF1B6C63DC005F3B0E /* TestCertificates.bundle */; };
 		7D8A186224D39101F90230F6 /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 35F2B6BF3BAE8F0DC4AFD76E /* libPods.a */; };
+		DCFAE001609CCBFE69DFA6A1 /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 35F2B6BF3BAE8F0DC4AFD76E /* libPods.a */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -27,6 +44,34 @@
 			remoteGlobalIDString = 635697C61B14FC11007A7283;
 			remoteInfo = Tests;
 		};
+		63DC84191BE15179000708E8 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 635697BF1B14FC11007A7283 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 635697C61B14FC11007A7283;
+			remoteInfo = Tests;
+		};
+		63DC84291BE15267000708E8 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 635697BF1B14FC11007A7283 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 635697C61B14FC11007A7283;
+			remoteInfo = Tests;
+		};
+		63DC843A1BE15294000708E8 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 635697BF1B14FC11007A7283 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 635697C61B14FC11007A7283;
+			remoteInfo = Tests;
+		};
+		63DC84491BE152B5000708E8 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 635697BF1B14FC11007A7283 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 635697C61B14FC11007A7283;
+			remoteInfo = Tests;
+		};
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXCopyFilesBuildPhase section */
@@ -45,7 +90,6 @@
 		0A4F89D9C90E9C30990218F0 /* Pods.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.release.xcconfig; path = "Pods/Target Support Files/Pods/Pods.release.xcconfig"; sourceTree = "<group>"; };
 		35F2B6BF3BAE8F0DC4AFD76E /* libPods.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libPods.a; sourceTree = BUILT_PRODUCTS_DIR; };
 		6312AE4D1B1BF49B00341DEE /* GRPCClientTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GRPCClientTests.m; sourceTree = "<group>"; };
-		63175DFE1B1B9FAF00027841 /* LocalClearTextTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = LocalClearTextTests.m; sourceTree = "<group>"; };
 		63423F441B150A5F006CF63C /* AllTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = AllTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		63423F501B151B77006CF63C /* RxLibraryUnitTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RxLibraryUnitTests.m; sourceTree = "<group>"; };
 		635697C71B14FC11007A7283 /* libTests.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libTests.a; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -53,6 +97,11 @@
 		635697D81B14FC11007A7283 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		635ED2EB1B1A3BC400FDE5C3 /* InteropTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = InteropTests.m; sourceTree = "<group>"; };
 		63715F551B780C020029CB0B /* InteropTestsLocalCleartext.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = InteropTestsLocalCleartext.m; sourceTree = "<group>"; };
+		6379CC4F1BE16703001BC0A1 /* InteropTestsRemote.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = InteropTestsRemote.m; sourceTree = "<group>"; };
+		63DC84131BE15179000708E8 /* RxLibraryUnitTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RxLibraryUnitTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		63DC84231BE15267000708E8 /* InteropTestsRemote.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = InteropTestsRemote.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
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@@ -76,6 +125,42 @@
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 			children = (
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+				63DC84231BE15267000708E8 /* InteropTestsRemote.xctest */,
+				63DC84341BE15294000708E8 /* InteropTestsLocalSSL.xctest */,
+				63DC84431BE152B5000708E8 /* InteropTestsLocalCleartext.xctest */,
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@@ -122,10 +211,10 @@
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 				63E240CC1B6C4D3A005F3B0E /* InteropTests.h */,
 				635ED2EB1B1A3BC400FDE5C3 /* InteropTests.m */,
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+				63DC84331BE15294000708E8 /* InteropTestsLocalSSL */,
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@@ -224,9 +414,158 @@
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@@ -281,6 +695,42 @@
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index a7e0ed110e..e6a052a8ce 100644
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@@ -45,6 +45,9 @@
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new file mode 100644
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new file mode 100644
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