This app can be used to manually test gRPC under changing network conditions.
It makes RPCs in a loop, logging when the request is sent and the response is received.
To test on the simulator, run pod install
, open the workspace created by Cocoapods, and run the app. Once running, disable WiFi (or ethernet) in your computer, then enable it again after a while. Don't bother with the simulator's WiFi or cell settings, as they have no effect: Simulator apps are just Mac apps running within the simulator UI.
The expected result is to never see a "hanged" RPC: success or failure should happen almost immediately after sending the request. Symptom of a hanged RPC is a log like the following being the last in your console:
2016-06-29 16:51:29.443 ConnectivityTestingApp[73129:3567949] Sending request.