Added class to subscribe to GCD notifications over XMPP.

remoting/signaling/gcd_notification_subscriber_unittest.cc

+// 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.
+
+#include "remoting/signaling/gcd_notification_subscriber.h"
+
+#include "remoting/signaling/mock_signal_strategy.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+using testing::_;
+using testing::AtLeast;
+using testing::DoAll;
+using testing::Return;
+using testing::SaveArg;
+
+namespace remoting {
+
+TEST(GcdNotificationSubscriberTest, Create) {
+  MockSignalStrategy signal_strategy;
+  EXPECT_CALL(signal_strategy, AddListener(_));
+  EXPECT_CALL(signal_strategy, RemoveListener(_));
+
+  GcdNotificationSubscriber subscriber(&signal_strategy);
+}
+
+TEST(GcdNotificationSubscriberTest, Subscribe) {
+  MockSignalStrategy signal_strategy;
+  EXPECT_CALL(signal_strategy, GetLocalJid())
+      .WillRepeatedly(Return("user@domain/resource"));
+  EXPECT_CALL(signal_strategy, GetNextId()).WillOnce(Return("next_id"));
+  EXPECT_CALL(signal_strategy, AddListener(_)).Times(AtLeast(1));
+  EXPECT_CALL(signal_strategy, RemoveListener(_)).Times(AtLeast(1));
+  buzz::XmlElement* sent_stanza;
+  EXPECT_CALL(signal_strategy, SendStanzaPtr(_))
+      .WillOnce(DoAll(SaveArg<0>(&sent_stanza), Return(true)));
+
+  GcdNotificationSubscriber subscriber(&signal_strategy);
+  SignalStrategy::Listener* listener = &subscriber;
+  listener->OnSignalStrategyStateChange(SignalStrategy::CONNECTED);
+
+  EXPECT_EQ(
+      "<cli:iq type=\"set\" to=\"user@domain\" id=\"next_id\""
+      " xmlns:cli=\"jabber:client\">"
+      "<push:subscribe xmlns:push=\"google:push\">"
+      "<push:item channel=\"cloud_devices\" from=\"\"/>"
+      "</push:subscribe>"
+      "</cli:iq>",
+      sent_stanza->Str());
+
+  delete sent_stanza;
+}
+
+}  // namespace remoting