content/browser/gamepad/gamepad_provider_unittest.cc

   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 #include "base/memory/scoped_ptr.h"
   6 #include "base/memory/weak_ptr.h"
   7 #include "base/process_util.h"
   8 #include "content/browser/gamepad/gamepad_data_fetcher.h"
   9 #include "content/browser/gamepad/gamepad_provider.h"
  10 #include "content/browser/gamepad/gamepad_test_helpers.h"
  11 #include "content/common/gamepad_hardware_buffer.h"
  12 #include "content/common/gamepad_messages.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14
  15 namespace content {
  16
  17 namespace {
  18
  19 using WebKit::WebGamepads;
  20
  21 // Helper class to generate and record user gesture callbacks.
  22 class UserGestureListener {
  23  public:
  24   UserGestureListener()
  25       : weak_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)),
  26         has_user_gesture_(false) {
  27   }
  28
  29   base::Closure GetClosure() {
  30     return base::Bind(&UserGestureListener::GotUserGesture,
  31                       weak_factory_.GetWeakPtr());
  32   }
  33
  34   bool has_user_gesture() const { return has_user_gesture_; }
  35
  36  private:
  37   void GotUserGesture() {
  38     has_user_gesture_ = true;
  39   }
  40
  41   base::WeakPtrFactory<UserGestureListener> weak_factory_;
  42   bool has_user_gesture_;
  43 };
  44
  45 // Main test fixture
  46 class GamepadProviderTest : public testing::Test, public GamepadTestHelper {
  47  public:
  48   GamepadProvider* CreateProvider(const WebGamepads& test_data) {
  49     mock_data_fetcher_ = new MockGamepadDataFetcher(test_data);
  50     provider_.reset(new GamepadProvider(
  51         scoped_ptr<GamepadDataFetcher>(mock_data_fetcher_)));
  52     return provider_.get();
  53   }
  54
  55  protected:
  56   GamepadProviderTest() {
  57   }
  58
  59   scoped_ptr<GamepadProvider> provider_;
  60
  61   // Pointer owned by the provider.
  62   MockGamepadDataFetcher* mock_data_fetcher_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(GamepadProviderTest);
  65 };
  66
  67 // Crashes. http://crbug.com/106163
  68 TEST_F(GamepadProviderTest, PollingAccess) {
  69   WebGamepads test_data;
  70   test_data.length = 1;
  71   test_data.items[0].connected = true;
  72   test_data.items[0].timestamp = 0;
  73   test_data.items[0].buttonsLength = 1;
  74   test_data.items[0].axesLength = 2;
  75   test_data.items[0].buttons[0] = 1.f;
  76   test_data.items[0].axes[0] = -1.f;
  77   test_data.items[0].axes[1] = .5f;
  78
  79   GamepadProvider* provider = CreateProvider(test_data);
  80   provider->Resume();
  81
  82   message_loop().RunUntilIdle();
  83
  84   mock_data_fetcher_->WaitForDataRead();
  85
  86   // Renderer-side, pull data out of poll buffer.
  87   base::SharedMemoryHandle handle = provider->GetSharedMemoryHandleForProcess(
  88       base::GetCurrentProcessHandle());
  89   scoped_ptr<base::SharedMemory> shared_memory(
  90       new base::SharedMemory(handle, true));
  91   EXPECT_TRUE(shared_memory->Map(sizeof(GamepadHardwareBuffer)));
  92   void* mem = shared_memory->memory();
  93
  94   GamepadHardwareBuffer* hwbuf = static_cast<GamepadHardwareBuffer*>(mem);
  95   // See gamepad_hardware_buffer.h for details on the read discipline.
  96   WebGamepads output;
  97
  98   base::subtle::Atomic32 version;
  99   do {
 100     version = hwbuf->sequence.ReadBegin();
 101     memcpy(&output, &hwbuf->buffer, sizeof(output));
 102   } while (hwbuf->sequence.ReadRetry(version));
 103
 104   EXPECT_EQ(1u, output.length);
 105   EXPECT_EQ(1u, output.items[0].buttonsLength);
 106   EXPECT_EQ(1.f, output.items[0].buttons[0]);
 107   EXPECT_EQ(2u, output.items[0].axesLength);
 108   EXPECT_EQ(-1.f, output.items[0].axes[0]);
 109   EXPECT_EQ(0.5f, output.items[0].axes[1]);
 110 }
 111
 112 // Tests that waiting for a user gesture works properly.
 113 TEST_F(GamepadProviderTest, UserGesture) {
 114   WebGamepads no_button_data;
 115   no_button_data.length = 1;
 116   no_button_data.items[0].connected = true;
 117   no_button_data.items[0].timestamp = 0;
 118   no_button_data.items[0].buttonsLength = 1;
 119   no_button_data.items[0].axesLength = 2;
 120   no_button_data.items[0].buttons[0] = 0.f;
 121   no_button_data.items[0].axes[0] = -1.f;
 122   no_button_data.items[0].axes[1] = .5f;
 123
 124   WebGamepads button_down_data = no_button_data;
 125   button_down_data.items[0].buttons[0] = 1.f;
 126
 127   UserGestureListener listener;
 128   GamepadProvider* provider = CreateProvider(no_button_data);
 129   provider->Resume();
 130
 131   // Register for a user gesture and make sure the provider reads it twice
 132   // see below for why).
 133   provider->RegisterForUserGesture(listener.GetClosure());
 134   mock_data_fetcher_->WaitForDataRead();
 135   mock_data_fetcher_->WaitForDataRead();
 136
 137   // It should not have issued our callback.
 138   message_loop().RunUntilIdle();
 139   EXPECT_FALSE(listener.has_user_gesture());
 140
 141   // Set a button down and wait for it to be read twice.
 142   //
 143   // We wait for two reads before calling RunAllPending because the provider
 144   // will read the data on the background thread (setting the event) and *then*
 145   // will issue the callback on our thread. Waiting for it to read twice
 146   // ensures that it was able to issue callbacks for the first read (if it
 147   // issued one) before we try to check for it.
 148   mock_data_fetcher_->SetTestData(button_down_data);
 149   mock_data_fetcher_->WaitForDataRead();
 150   mock_data_fetcher_->WaitForDataRead();
 151
 152   // It should have issued our callback.
 153   message_loop().RunUntilIdle();
 154   EXPECT_TRUE(listener.has_user_gesture());
 155 }
 156
 157 }  // namespace
 158
 159 }  // namespace content