content/browser/gamepad/gamepad_test_helpers.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_GAMEPAD_GAMEPAD_TEST_HELPERS_H_
   6 #define CONTENT_BROWSER_GAMEPAD_GAMEPAD_TEST_HELPERS_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/message_loop.h"
  10 #include "base/synchronization/lock.h"
  11 #include "base/synchronization/waitable_event.h"
  12 #include "content/browser/gamepad/gamepad_data_fetcher.h"
  13 #include "third_party/WebKit/Source/Platform/chromium/public/WebGamepads.h"
  14
  15 namespace base {
  16 class SystemMonitor;
  17 }
  18
  19 namespace content {
  20
  21 class GamepadService;
  22
  23 // Data fetcher that returns canned data for the gamepad provider.
  24 class MockGamepadDataFetcher : public GamepadDataFetcher {
  25  public:
  26   // Initializes the fetcher with the given gamepad data, which will be
  27   // returned when the provider queries us.
  28   explicit MockGamepadDataFetcher(const WebKit::WebGamepads& test_data);
  29
  30   virtual ~MockGamepadDataFetcher();
  31
  32   // GamepadDataFetcher.
  33   virtual void GetGamepadData(WebKit::WebGamepads* pads,
  34                               bool devices_changed_hint) OVERRIDE;
  35
  36   // Blocks the current thread until the GamepadProvider reads from this
  37   // fetcher on the background thread.
  38   void WaitForDataRead();
  39
  40   // Updates the test data.
  41   void SetTestData(const WebKit::WebGamepads& new_data);
  42
  43  private:
  44   base::Lock lock_;
  45   WebKit::WebGamepads test_data_;
  46   base::WaitableEvent read_data_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(MockGamepadDataFetcher);
  49 };
  50
  51 // Base class for the other test helpers. This just sets up the system monitor.
  52 class GamepadTestHelper {
  53  public:
  54   GamepadTestHelper();
  55   virtual ~GamepadTestHelper();
  56
  57   MessageLoop& message_loop() { return message_loop_; }
  58
  59  private:
  60   // This must be constructed before the system monitor.
  61   MessageLoop message_loop_;
  62
  63   scoped_ptr<base::SystemMonitor> system_monitor_;
  64
  65   DISALLOW_COPY_AND_ASSIGN(GamepadTestHelper);
  66 };
  67
  68 // Constructs a GamepadService with a mock data source. This bypasses the
  69 // global singleton for the gamepad service.
  70 class GamepadServiceTestConstructor : public GamepadTestHelper {
  71  public:
  72   explicit GamepadServiceTestConstructor(const WebKit::WebGamepads& test_data);
  73   virtual ~GamepadServiceTestConstructor();
  74
  75   GamepadService* gamepad_service() { return gamepad_service_; }
  76   MockGamepadDataFetcher* data_fetcher() { return data_fetcher_; }
  77
  78  private:
  79   // Owning pointer (can't be a scoped_ptr due to private destructor).
  80   GamepadService* gamepad_service_;
  81
  82   // Pointer owned by the provider (which is owned by the gamepad service).
  83   MockGamepadDataFetcher* data_fetcher_;
  84
  85   DISALLOW_COPY_AND_ASSIGN(GamepadServiceTestConstructor);
  86 };
  87
  88 }  // namespace content
  89
  90 #endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_TEST_HELPERS_H_