1 files changed, 112 insertions, 0 deletions
diff --git a/src/objective-c/tests/ChannelTests/ChannelTests.m b/src/objective-c/tests/ChannelTests/ChannelTests.m
new file mode 100644
index 0000000000..df78e8b116
--- /dev/null
+++ b/src/objective-c/tests/ChannelTests/ChannelTests.m
@@ -0,0 +1,112 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#import <XCTest/XCTest.h>
+
+#import "../../GRPCClient/GRPCCallOptions.h"
+#import "../../GRPCClient/private/GRPCChannel.h"
+#import "../../GRPCClient/private/GRPCChannelPool+Test.h"
+#import "../../GRPCClient/private/GRPCChannelPool.h"
+#import "../../GRPCClient/private/GRPCCompletionQueue.h"
+#import "../../GRPCClient/private/GRPCWrappedCall.h"
+
+static NSString *kDummyHost = @"dummy.host";
+static NSString *kDummyPath = @"/dummy/path";
+
+@interface ChannelTests : XCTestCase
+
+@end
+
+@implementation ChannelTests
+
++ (void)setUp {
+  grpc_init();
+}
+
+- (void)testPooledChannelCreatingChannel {
+  GRPCCallOptions *options = [[GRPCCallOptions alloc] init];
+  GRPCChannelConfiguration *config =
+      [[GRPCChannelConfiguration alloc] initWithHost:kDummyHost callOptions:options];
+  GRPCPooledChannel *channel = [[GRPCPooledChannel alloc] initWithChannelConfiguration:config];
+  GRPCCompletionQueue *cq = [GRPCCompletionQueue completionQueue];
+  GRPCWrappedCall *wrappedCall =
+      [channel wrappedCallWithPath:kDummyPath completionQueue:cq callOptions:options];
+  XCTAssertNotNil(channel.wrappedChannel);
+  (void)wrappedCall;
+}
+
+- (void)testTimedDestroyChannel {
+  const NSTimeInterval kDestroyDelay = 1.0;
+  GRPCCallOptions *options = [[GRPCCallOptions alloc] init];
+  GRPCChannelConfiguration *config =
+      [[GRPCChannelConfiguration alloc] initWithHost:kDummyHost callOptions:options];
+  GRPCPooledChannel *channel =
+      [[GRPCPooledChannel alloc] initWithChannelConfiguration:config destroyDelay:kDestroyDelay];
+  GRPCCompletionQueue *cq = [GRPCCompletionQueue completionQueue];
+  GRPCWrappedCall *wrappedCall;
+  GRPCChannel *wrappedChannel;
+  @autoreleasepool {
+    wrappedCall = [channel wrappedCallWithPath:kDummyPath completionQueue:cq callOptions:options];
+    XCTAssertNotNil(channel.wrappedChannel);
+
+    // Unref and ref channel immediately; expect using the same raw channel.
+    wrappedChannel = channel.wrappedChannel;
+
+    wrappedCall = nil;
+    wrappedCall = [channel wrappedCallWithPath:kDummyPath completionQueue:cq callOptions:options];
+    XCTAssertEqual(channel.wrappedChannel, wrappedChannel);
+
+    // Unref and ref channel after destroy delay; expect a new raw channel.
+    wrappedCall = nil;
+  }
+  sleep(kDestroyDelay + 1);
+  XCTAssertNil(channel.wrappedChannel);
+  wrappedCall = [channel wrappedCallWithPath:kDummyPath completionQueue:cq callOptions:options];
+  XCTAssertNotEqual(channel.wrappedChannel, wrappedChannel);
+}
+
+- (void)testDisconnect {
+  const NSTimeInterval kDestroyDelay = 1.0;
+  GRPCCallOptions *options = [[GRPCCallOptions alloc] init];
+  GRPCChannelConfiguration *config =
+      [[GRPCChannelConfiguration alloc] initWithHost:kDummyHost callOptions:options];
+  GRPCPooledChannel *channel =
+      [[GRPCPooledChannel alloc] initWithChannelConfiguration:config destroyDelay:kDestroyDelay];
+  GRPCCompletionQueue *cq = [GRPCCompletionQueue completionQueue];
+  GRPCWrappedCall *wrappedCall =
+      [channel wrappedCallWithPath:kDummyPath completionQueue:cq callOptions:options];
+  XCTAssertNotNil(channel.wrappedChannel);
+
+  // Disconnect; expect wrapped channel to be dropped
+  [channel disconnect];
+  XCTAssertNil(channel.wrappedChannel);
+
+  // Create a new call and unref the old call; confirm that destroy of the old call does not make
+  // the channel disconnect, even after the destroy delay.
+  GRPCWrappedCall *wrappedCall2 =
+      [channel wrappedCallWithPath:kDummyPath completionQueue:cq callOptions:options];
+  XCTAssertNotNil(channel.wrappedChannel);
+  GRPCChannel *wrappedChannel = channel.wrappedChannel;
+  wrappedCall = nil;
+  sleep(kDestroyDelay + 1);
+  XCTAssertNotNil(channel.wrappedChannel);
+  XCTAssertEqual(wrappedChannel, channel.wrappedChannel);
+  (void)wrappedCall2;
+}
+
+@end