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/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/public/platform/WebGamepads.h"
  14
  15 namespace content {
  16
  17 class GamepadService;
  18
  19 // Data fetcher that returns canned data for the gamepad provider.
  20 class MockGamepadDataFetcher : public GamepadDataFetcher {
  21  public:
  22   // Initializes the fetcher with the given gamepad data, which will be
  23   // returned when the provider queries us.
  24   explicit MockGamepadDataFetcher(const blink::WebGamepads& test_data);
  25
  26   virtual ~MockGamepadDataFetcher();
  27
  28   // GamepadDataFetcher.
  29   virtual void GetGamepadData(blink::WebGamepads* pads,
  30                               bool devices_changed_hint) OVERRIDE;
  31
  32   // Blocks the current thread until the GamepadProvider reads from this
  33   // fetcher on the background thread.
  34   void WaitForDataRead();
  35
  36   // Blocks the current thread until the GamepadProvider reads from this
  37   // fetcher on the background thread and issued all callbacks related to the
  38   // read on the client's thread.
  39   void WaitForDataReadAndCallbacksIssued();
  40
  41   // Updates the test data.
  42   void SetTestData(const blink::WebGamepads& new_data);
  43
  44  private:
  45   base::Lock lock_;
  46   blink::WebGamepads test_data_;
  47   base::WaitableEvent read_data_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(MockGamepadDataFetcher);
  50 };
  51
  52 // Base class for the other test helpers. This just sets up the system monitor.
  53 class GamepadTestHelper {
  54  public:
  55   GamepadTestHelper();
  56   virtual ~GamepadTestHelper();
  57
  58   base::MessageLoop& message_loop() { return message_loop_; }
  59
  60  private:
  61   // This must be constructed before the system monitor.
  62   base::MessageLoop message_loop_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(GamepadTestHelper);
  65 };
  66
  67 // Constructs a GamepadService with a mock data source. This bypasses the
  68 // global singleton for the gamepad service.
  69 class GamepadServiceTestConstructor : public GamepadTestHelper {
  70  public:
  71   explicit GamepadServiceTestConstructor(const blink::WebGamepads& test_data);
  72   virtual ~GamepadServiceTestConstructor();
  73
  74   GamepadService* gamepad_service() { return gamepad_service_; }
  75   MockGamepadDataFetcher* data_fetcher() { return data_fetcher_; }
  76
  77  private:
  78   // Owning pointer (can't be a scoped_ptr due to private destructor).
  79   GamepadService* gamepad_service_;
  80
  81   // Pointer owned by the provider (which is owned by the gamepad service).
  82   MockGamepadDataFetcher* data_fetcher_;
  83
  84   DISALLOW_COPY_AND_ASSIGN(GamepadServiceTestConstructor);
  85 };
  86
  87 }  // namespace content
  88
  89 #endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_TEST_HELPERS_H_