Fix tests.

Author: Oleksiy Ivanov

Example/Messaging/Tests/FIRMessagingServiceTest.m

@@ -198,7 +198,8 @@ - (void)testSubscribeWithNoTopicPrefix {
   NSString *topicNameWithPrefix = [FIRMessagingPubSub addPrefixToTopic:topicName];
   messaging.pubsub = mockPubSub;
   messaging.defaultFcmToken = @"fake-default-token";
-  OCMExpect([messaging.pubsub subscribeToTopic:[OCMArg isEqual:topicNameWithPrefix]]);
+  OCMExpect([messaging.pubsub subscribeToTopic:[OCMArg isEqual:topicNameWithPrefix]
+                                       handler:[OCMArg any]]);
   [messaging subscribeToTopic:topicName];
   OCMVerifyAll(mockPubSub);
   // Need to swap back since it's a singleton and hence will live beyond the scope of this test.
@@ -213,7 +214,7 @@ - (void)testSubscribeWithTopicPrefix {
   NSString *topicName = @"/topics/topicWithoutPrefix";
   messaging.pubsub = mockPubSub;
   messaging.defaultFcmToken = @"fake-default-token";
-  OCMExpect([messaging.pubsub subscribeToTopic:[OCMArg isEqual:topicName]]);
+  OCMExpect([messaging.pubsub subscribeToTopic:[OCMArg isEqual:topicName] handler:[OCMArg any]]);
   [messaging subscribeToTopic:topicName];
   OCMVerifyAll(mockPubSub);
   // Need to swap back since it's a singleton and hence will live beyond the scope of this test.
@@ -229,7 +230,8 @@ - (void)testUnsubscribeWithNoTopicPrefix {
   NSString *topicNameWithPrefix = [FIRMessagingPubSub addPrefixToTopic:topicName];
   messaging.pubsub = mockPubSub;
   messaging.defaultFcmToken = @"fake-default-token";
-  OCMExpect([messaging.pubsub unsubscribeFromTopic:[OCMArg isEqual:topicNameWithPrefix]]);
+  OCMExpect([messaging.pubsub unsubscribeFromTopic:[OCMArg isEqual:topicNameWithPrefix]
+                                           handler:[OCMArg any]]);
   [messaging unsubscribeFromTopic:topicName];
   OCMVerifyAll(mockPubSub);
   // Need to swap back since it's a singleton and hence will live beyond the scope of this test.
@@ -244,7 +246,8 @@ - (void)testUnsubscribeWithTopicPrefix {
   NSString *topicName = @"/topics/topicWithPrefix";
   messaging.pubsub = mockPubSub;
   messaging.defaultFcmToken = @"fake-default-token";
-  OCMExpect([messaging.pubsub unsubscribeFromTopic:[OCMArg isEqual:topicName]]);
+  OCMExpect([messaging.pubsub unsubscribeFromTopic:[OCMArg isEqual:topicName]
+                                           handler:[OCMArg any]]);
   [messaging unsubscribeFromTopic:topicName];
   OCMVerifyAll(mockPubSub);
   // Need to swap back since it's a singleton and hence will live beyond the scope of this test.