update testing (#69)

* update testing

* combine test graph traversal into a utility

Author: mjheilmann

lib/grpc_reflection/service/builder/util.ex

@@ -163,6 +163,9 @@ defmodule GrpcReflection.Service.Builder.Util do
     []
   end
 
+  # in gRPC, the leading "." signifies it is a FQDN
+  # we trim it and assume everything is a FQDN
+  # it works so far, but there may be corner cases
   def trim_symbol("." <> symbol), do: symbol
   def trim_symbol(symbol), do: symbol
 end

priv/protos/recursive_message.proto

@@ -0,0 +1,15 @@
+syntax = "proto3";
+
+package recursive_message;
+
+service Service {
+  rpc call (Request) returns (Reply) {}
+}
+
+message Request {
+  Reply reply = 1;
+}
+
+message Reply {
+  Request request = 1;
+}