Linux native notifications: Add server capabilities metrics

chrome/browser/notifications/notification_platform_bridge_linux_unittest.cc

 // Copyright 2017 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 "chrome/browser/notifications/notification_platform_bridge_linux.h"
 
 #include <memory>
+#include <vector>
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/notifications/notification.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/test_utils.h"
 #include "dbus/mock_bus.h"
 #include "dbus/mock_object_proxy.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 const char kFreedesktopNotificationsName[] = "org.freedesktop.Notifications";
 const char kFreedesktopNotificationsPath[] = "/org/freedesktop/Notifications";
 
 ACTION_P(RegisterSignalCallback, callback_addr) {
   *callback_addr = arg2;
   arg3.Run("" /* interface_name */, "" /* signal_name */, true /* success */);
 }
 
+ACTION_P(OnGetCapabilities, capabilities) {
+  // MockObjectProxy::CallMethodAndBlock will wrap the return value in
+  // a unique_ptr.
+  dbus::Response* response = dbus::Response::CreateEmpty().release();
+  dbus::MessageWriter writer(response);
+  writer.AppendArrayOfStrings(capabilities);
+  return response;
+}
+
 }  // namespace
 
 class NotificationPlatformBridgeLinuxTest : public testing::Test {
  public:
   NotificationPlatformBridgeLinuxTest() = default;
   ~NotificationPlatformBridgeLinuxTest() override = default;
 
   void SetUp() override {
     mock_bus_ = new dbus::MockBus(dbus::Bus::Options());
     mock_notification_proxy_ = new testing::StrictMock<dbus::MockObjectProxy>(
         mock_bus_.get(), kFreedesktopNotificationsName,
         dbus::ObjectPath(kFreedesktopNotificationsPath));
 
     EXPECT_CALL(*mock_bus_.get(),
                 GetObjectProxy(kFreedesktopNotificationsName,
                                dbus::ObjectPath(kFreedesktopNotificationsPath)))
         .WillOnce(testing::Return(mock_notification_proxy_.get()));
 
     EXPECT_CALL(*mock_notification_proxy_.get(),
+                MockCallMethodAndBlock(testing::_, testing::_))
+        .WillOnce(OnGetCapabilities(std::vector<std::string>()));
+
+    EXPECT_CALL(*mock_notification_proxy_.get(),
                 ConnectToSignal(kFreedesktopNotificationsName, "ActionInvoked",
                                 testing::_, testing::_))
         .WillOnce(RegisterSignalCallback(&action_invoked_callback_));
 
     EXPECT_CALL(*mock_notification_proxy_.get(),
                 ConnectToSignal(kFreedesktopNotificationsName,
                                 "NotificationClosed", testing::_, testing::_))
         .WillOnce(RegisterSignalCallback(&notification_closed_callback_));
 
     notification_bridge_linux_ =
@@ skipping 18 matching lines @@
   base::Callback<void(dbus::Signal*)> action_invoked_callback_;
   base::Callback<void(dbus::Signal*)> notification_closed_callback_;
 
   std::unique_ptr<NotificationPlatformBridgeLinux> notification_bridge_linux_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NotificationPlatformBridgeLinuxTest);
 };
 
 TEST_F(NotificationPlatformBridgeLinuxTest, SetUpAndTearDown) {}