Implement the gamepad API in the IPC proxy

content/browser/gamepad/gamepad_test_helpers.h

+// Copyright (c) 2012 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.
+
+#ifndef CONTENT_BROWSER_GAMEPAD_GAMEPAD_TEST_HELPERS_H_
+#define CONTENT_BROWSER_GAMEPAD_GAMEPAD_TEST_HELPERS_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
+#include "base/synchronization/lock.h"
+#include "base/synchronization/waitable_event.h"
+#include "content/browser/gamepad/gamepad_data_fetcher.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebGamepads.h"
+
+namespace base {
+class SystemMonitor;
+}
+
+namespace content {
+
+class GamepadService;
+
+// Data fetcher that returns canned data for the gamepad provider.
+class MockGamepadDataFetcher : public GamepadDataFetcher {
+ public:
+  // Initializes the fetcher with the given gamepad data, which will be
+  // returned when the provider queries us.
+  explicit MockGamepadDataFetcher(const WebKit::WebGamepads& test_data);
+
+  virtual ~MockGamepadDataFetcher();
+
+  // GamepadDataFetcher.
+  virtual void GetGamepadData(WebKit::WebGamepads* pads,
+                              bool devices_changed_hint) OVERRIDE;
+
+  // Blocks the current thread until the GamepadProvider reads from this
+  // fetcher on the background thread.
+  void WaitForDataRead();
+
+  // Updates the test data.
+  void SetTestData(const WebKit::WebGamepads& new_data);
+
+ private:
+  base::Lock lock_;
+  WebKit::WebGamepads test_data_;
+  base::WaitableEvent read_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockGamepadDataFetcher);
+};
+
+// Base class for the other test helpers. This just sets up the system monitor.
+class GamepadTestHelper {
+ public:
+  GamepadTestHelper();
+  virtual ~GamepadTestHelper();
+
+  MessageLoop& message_loop() { return message_loop_; }
+
+ private:
+  // This must be constructed before the system monitor.
+  MessageLoop message_loop_;
+
+  scoped_ptr<base::SystemMonitor> system_monitor_;
+
+  DISALLOW_COPY_AND_ASSIGN(GamepadTestHelper);
+};
+
+// Constructs a GamepadService with a mock data source. This bypasses the
+// global singleton for the gamepad service.
+class GamepadServiceTestConstructor : public GamepadTestHelper {
+ public:
+  GamepadServiceTestConstructor(const WebKit::WebGamepads& test_data);
+  virtual ~GamepadServiceTestConstructor();
+
+  GamepadService* gamepad_service() { return gamepad_service_; }
+  MockGamepadDataFetcher* data_fetcher() { return data_fetcher_; }
+
+ private:
+  // Owning pointer (can't be a scoped_ptr due to private destructor).
+  GamepadService* gamepad_service_;
+
+  // Pointer owned by the provider (which is owned by the gamepad service).
+  MockGamepadDataFetcher* data_fetcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(GamepadServiceTestConstructor);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_TEST_HELPERS_H_