The current check in ServerCallImpl is theoretically unsafe (#3059). Move that check into the stub, and expand the unit tests to cover other interesting edge cases on the server side:
client sends one, but zero requests received at onHalfClose
client sends one, but > 1 requests received at onHalfClose
server sends one, but zero responses sent at onComplete
server sends one, but > 1 responses sent via onNext
fixes#2243fixes#3059
migrated simple tests using `GrpcServerRule`.
Kept the low level in-process channel setup and tear down code for the RouteGuide example to show how users can use in-process directly to set more custom channel builder options when needed.
resolves#2490
Discovered when importing grpc to internal repo:
1. ErrorProne: Compound assignments from floating point to integral
types hide dangerous casts.
2. found raw type: io.grpc.ManagedChannelBuilder missing type arguments
for generic class io.grpc.ManagedChannelBuilder<T>
zpencer
ZHANG Dapeng
Carl Mastrangelo
Eric Anderson
Kun Zhang