Is there any way to write a test for a python grpc server with streaming responses?

Question

There are some questions here regarding grpc testing in python, but none of them involve streaming responses. Unfortunately the grpc maintainers are not documenting the testing API besides a generic auto generated page.

Let's say there is a grpc interface like this:

service EchoService {
    rpc doStuff(EchoRequest) returns (stream EchoResponse) {
    }
}

message EchoRequest {
    string name = 1;
}

message EchoResponse {
    string name = 1;
}

With a server implementation like this:

class MyServer(myservice_pb2_grpc.EchoServiceServicer):
    async def doStuff(
        self, request: myservice_pb2.EchoRequest, context: grpc.aio.ServicerContext
    ):
        yield myservice_pb2.EchoResponse(name=f"test response {request.name}")

How can you write a test for this server implementation?

I've tried several approaches not knowing which one could possibly work. The most promising one to me seems to be to use pytest-grpc using code like this:

@pytest.fixture(scope="module")
def grpc_servicer():
    return server.MyServer()


def test_do_stuff(grpc_stub):
    request = myservice_pb2.EchoRequest(name="foo")
    response = grpc_stub.doStuff(request)
    breakpoint()

However here this error is returned, which seems to suggest that some grpc internal is not capable of handling async implementations:

Exception iterating responses: \'async_generator\' object is not an iterator"
<_MultiThreadedRendezvous of RPC that terminated with:
    status = StatusCode.UNKNOWN
    details = "Exception iterating responses: 'async_generator' object is not an iterator"
    debug_error_string = "UNKNOWN:Error received from peer  {grpc_message:"Exception iterating responses: \'async_generator\' object is not an iterator", grpc_status:2, created_time:"2023-12-12T09:58:11.624820951+00:00"}"