Introduced support for external services registration in the ServiceProtocol

runtime/observatory/tests/service/external_service_notification_invocation_test.dart

+// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+// VMOptions=--error_on_bad_type --error_on_bad_override
+
+import 'package:observatory/service_io.dart';
+import 'package:unittest/unittest.dart';
+import 'test_helper.dart';
+import 'dart:io' show WebSocket;
+import 'dart:convert' show JSON;
+import 'dart:async' show Future, StreamController;
+
+var tests = [
+  (Isolate isolate) async {
+    VM vm = isolate.owner;
+
+    final serviceEvents =
+        (await vm.getEventStream('_Service')).asBroadcastStream();
+
+    WebSocket _socket =
+        await WebSocket.connect((vm as WebSocketVM).target.networkAddress);
+    WebSocket _socket_invoker =
+        await WebSocket.connect((vm as WebSocketVM).target.networkAddress);
+
+    final socket = new StreamController();
+    final socket_invoker = new StreamController();
+
+    // Avoid to manually encode and decode messages from the stream
+    socket.stream.map(JSON.encode).pipe(_socket);
+    socket_invoker.stream.map(JSON.encode).pipe(_socket_invoker);
+    final client = _socket.map(JSON.decode).asBroadcastStream();
+    final client_invoker = _socket_invoker.map(JSON.decode).asBroadcastStream();
+
+    const serviceName = 'successService';
+    const serviceAlias = 'serviceAlias';
+    const paramKey = 'pkey';
+    const paramValue = 'pvalue';
+    const repetition = 5;
+
+    socket.add({
+      'jsonrpc': '2.0',
+      'id': 1,
+      'method': '_registerService',
+      'params': {'service': serviceName, 'alias': serviceAlias}
+    });
+
+    // Avoid flaky test.
+    // We cannot assume the order in which two messages will arrive
+    // from two different sockets
+    await Future.wait([client.first, serviceEvents.first]);
+
+    client_invoker.first.then((_) {
+      expect(false, isTrue, reason: 'shouldn\'t get here');
+    }).catchError((e) => e);
+
+    // Testing serial invocation of service which succedes
+    for (var iteration = 0; iteration < repetition; iteration++) {
+      final end = iteration.toString();
+      socket_invoker.add({
+        'jsonrpc': '2.0',
+        'method': vm.services.first.method,
+        'params': {paramKey + end: paramValue + end}
+      });
+      final request = await client.first;
+
+      expect(request, contains('id'));
+      expect(request['id'], isNotNull);
+      expect(request['method'], equals(serviceName));
+      expect(request['params'], isNotNull);
+      expect(request['params'][paramKey + end], equals(paramValue + end));
+
+      socket.add({'jsonrpc': '2.0', 'id': request['id'], 'result': {}});
+    }
+
+    await socket.close();
+    await socket_invoker.close();
+  },
+];
+
+main(args) => runIsolateTests(args, tests);