how do I write tests for my gRPC server? (Python)

[avi...@verloop.io]

Let's say I have a simple proto:

service HelloService {
    rpc SayHello(HelloReq) returns (HelloResp) {};
}


message HelloReq {
    string Name = 1;
}


message HelloResp {
    string Result = 1;
}

and my SayHello is implemented like:

class HelloServicer(hello_pb2_grpc.HelloServiceServicer):


    def SayHello(self, request, context):
        if len(request.Name) >= 10:
            msg = 'Length of `Name` cannot be more than 10 characters'
            context.set_details(msg)
            context.set_code(grpc.StatusCode.INVALID_ARGUMENT)
            return hello_pb2.HelloResp()


        return hello_pb2.HelloResp(Result="Hey, {}!".format(request.Name))

Can anyone tell me how do I write tests for my server? I checked this repo - https://github.com/grpc/grpc/tree/master/src/python/grpcio_tests/tests/testing or the docs here - https://grpc.io/grpc/python/grpc_testing.html but I couldn't understand anything at all.

I really appreciate some help, thank you!

[Eric Gribkoff]

This was answered on Gitter earlier this week, but reposting my response here for anyone who finds this in the future:

We don't have a stand-alone example of unit testing a gRPC service (yet - I just filed grpc/grpc#17453). The APIs documented at https://grpc.io/grpc/python/grpc_testing.html are what you should be using, but the best I can do right now as far as pointing you to a "simple" usage of these is the test_successful_unary_unary method in https://github.com/grpc/grpc/blob/master/src/python/grpcio_tests/tests/testing/_server_test.py

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