Create an apptesting framework for dart.

services/dart/dart_apptests/pingpong_apptests.dart

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:async';
+import 'mojo:application';
+import 'mojo:bindings';
+import 'mojo:core';
+
+import 'package:apptest/apptest.dart';
+import 'package:services/dart/test/pingpong_service.mojom.dart';
+
+class _TestingPingPongClient extends PingPongClient {
+  final PingPongClientStub stub;
+  Completer _completer;
+
+  _TestingPingPongClient.unbound() : stub = new PingPongClientStub.unbound() {
+    stub.delegate = this;
+  }
+
+  waitForPong() async {
+    _completer = new Completer();
+    return _completer.future;
+  }
+
+  void pong(int pongValue) {
+    _completer.complete(pongValue);
+    _completer = null;
+  }
+}
+
+pingpongApptests(Application application) {
+  group('Ping-Pong Service Apptests', () {
+    // Verify that "pingpong.dart" implements the PingPongService interface
+    // and sends responses to our client.
+    test('Ping Service To Pong Client', () async {
+      var pingPongServiceProxy = new PingPongServiceProxy.unbound();
+      application.connectToService("mojo:dart_pingpong", pingPongServiceProxy);
+
+      var pingPongClient = new _TestingPingPongClient.unbound();
+      pingPongServiceProxy.ptr.setClient(pingPongClient.stub);
+      pingPongClient.stub.listen();
+
+      pingPongServiceProxy.ptr.ping(1);
+      var pongValue = await pingPongClient.waitForPong();
+      expect(pongValue, equals(2));
+
+      pingPongServiceProxy.ptr.ping(100);
+      pongValue = await pingPongClient.waitForPong();
+      expect(pongValue, equals(101));
+
+      pingPongClient.stub.close();
+      pingPongServiceProxy.close();
+    });
+
+    // Verify that "pingpong.dart" can connect to "pingpong_target.dart", act as
+    // its client, and return a Future that only resolves after the
+    // target.ping() => client.pong() methods have executed 9 times.
+    test('Ping Target URL', () async {
+      var pingPongServiceProxy = new PingPongServiceProxy.unbound();
+      application.connectToService("mojo:dart_pingpong", pingPongServiceProxy);
+
+      var r = await pingPongServiceProxy.ptr.pingTargetUrl(
+          "mojo:dart_pingpong_target", 9);
+      expect(r.ok, equals(true));
+
+      pingPongServiceProxy.close();
+    });
+
+    // Same as the previous test except that instead of providing the
+    // pingpong_target.dart URL, we provide a connection to its PingPongService.
+    test('Ping Target Service', () async {
+      var pingPongServiceProxy = new PingPongServiceProxy.unbound();
+      application.connectToService("mojo:dart_pingpong", pingPongServiceProxy);
+
+      var targetServiceProxy = new PingPongServiceProxy.unbound();
+      application.connectToService(
+          "mojo:dart_pingpong_target",
+          targetServiceProxy);
+
+      // TODO(erg): The dart bindings can't currently pass a proxy that we've
+      // received from another service and pass it it as a parameter to a call
+      // to another service. Uncomment this once this works.

[Elliot Glaysher, 2015/03/04 20:17:02]

Updated this comment into a TODO to uncomment this code when the bindings can
handle it.

+      //
+      // var r = await pingPongServiceProxy.ptr.pingTargetService(
+      //    targetServiceProxy.impl, 9);
+      // expect(r.ok, equals(true));
+
+      targetServiceProxy.close();
+      pingPongServiceProxy.close();
+    });
+
+    // Verify that Dart can implement an interface "request" parameter.
+    test('Get Target Service', () async {
+      var pingPongServiceProxy = new PingPongServiceProxy.unbound();
+      application.connectToService("mojo:dart_pingpong", pingPongServiceProxy);
+
+      var targetServiceProxy = new PingPongServiceProxy.unbound();
+      pingPongServiceProxy.ptr.getPingPongService(targetServiceProxy);
+
+      var pingPongClient = new _TestingPingPongClient.unbound();
+      targetServiceProxy.ptr.setClient(pingPongClient.stub);
+      pingPongClient.stub.listen();
+
+      targetServiceProxy.ptr.ping(1);
+      var pongValue = await pingPongClient.waitForPong();
+      expect(pongValue, equals(2));
+
+      targetServiceProxy.ptr.ping(100);
+      pongValue = await pingPongClient.waitForPong();
+      expect(pongValue, equals(101));
+
+      pingPongClient.stub.close();
+      targetServiceProxy.close();
+      pingPongServiceProxy.close();
+    });
+  });
+}