1This app can be used to manually test gRPC under changing network conditions. 2 3It makes RPCs in a loop, logging when the request is sent and the response is received. 4 5To test on the simulator, run `pod install`, open the workspace created by Cocoapods, and run the 6app on an iOS device. Once running, tap a few times of each of the two buttons to make a few unary and streaming 7calls. Then disable/enable different network interfaces (WiFi, cellular) on your device. 8 9The expected behavior is that the pending streaming calls fails immediately with error UNAVAILABLE. 10Moreover, when network comes back, new calls have the same behavior. 11 12``` 132016-06-29 16:51:29.443 ConnectivityTestingApp[73129:3567949] Sending request. 14``` 15