Initial support for generating client and server stubs for Dart.

test/service_test.dart

+library service_test;
+
+import 'dart:async' show Future;
+
+import 'package:protobuf/protobuf.dart';
+import 'package:unittest/unittest.dart';
+
+import '../out/protos/service.pb.dart' as pb;
+
+class SearchService extends pb.SearchServiceBase {
+    Future<pb.SearchResponse> search(ServerContext ctx, pb.SearchRequest request) async {

[Søren Gjesse, 2015/06/25 13:04:49]

Long line.

[wibling, 2015/06/25 13:10:04]

Done.

+      var out = new pb.SearchResponse();
+      if (request.query == 'hello' || request.query == 'world') {
+        out.result.add('hello, world!');
+      }
+      return out;
+    }
+}
+
+class FakeJsonServer {
+  final GeneratedService searchService;
+  FakeJsonServer(this.searchService);
+
+  Future<String> messageHandler(
+      String serviceName, String methodName, String requestJson) async {
+    if (serviceName == 'SearchService') {
+      GeneratedMessage request = searchService.createRequest(methodName);
+      request.mergeFromJson(requestJson);
+      var ctx = new ServerContext();
+      var reply = await searchService.handleCall(ctx, methodName, request);
+      return reply.writeToJson();
+    } else {
+      throw 'unknown service: $serviceName';
+    }
+  }
+}
+
+class FakeJsonClient implements RpcClient {
+  final FakeJsonServer server;
+  FakeJsonClient(this.server);
+
+  Future<GeneratedMessage> invoke(
+    ClientContext ctx, String serviceName, String methodName,
+    GeneratedMessage request, GeneratedMessage response) async {
+
+    String requestJson = request.writeToJson();
+    String replyJson =
+        await server.messageHandler(serviceName, methodName, requestJson);
+    response.mergeFromJson(replyJson);
+    return response;
+  }
+}
+
+void main() {
+  var server = new FakeJsonServer(new SearchService());
+  var api = new pb.SearchServiceApi(new FakeJsonClient(server));
+
+  test('end to end RPC using JSON', () async {
+    var request = new pb.SearchRequest()
+      ..query = "hello";
+    var reply = await api.search(new ClientContext(), request);
+    expect(reply.result, ["hello, world!"]);
+  });
+}