exo: Implement wayland gamepad support

components/exo/gamepad_unittest.cc

+// Copyright 2015 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 "ash/shell.h"
+#include "base/command_line.h"
+#include "base/test/test_simple_task_runner.h"
+#include "components/exo/buffer.h"
+#include "components/exo/gamepad.h"
+#include "components/exo/gamepad_delegate.h"
+#include "components/exo/shell_surface.h"
+#include "components/exo/surface.h"
+#include "components/exo/test/exo_test_base.h"
+#include "components/exo/test/exo_test_helper.h"
+#include "device/gamepad/gamepad_test_helpers.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/aura/client/focus_client.h"
+
+namespace exo {
+namespace {
+
+class MockGamepadDelegate : public GamepadDelegate {
+ public:
+  MockGamepadDelegate() {}
+
+  // Overridden from GamepadDelegate:
+  MOCK_METHOD1(OnGamepadDestroying, void(Gamepad*));
+  MOCK_CONST_METHOD1(CanAcceptGamepadEventsForSurface, bool(Surface*));
+  MOCK_METHOD1(OnStateChange, void(bool));
+  MOCK_METHOD2(OnAxis, void(int, double));
+  MOCK_METHOD3(OnButton, void(int, bool, double));
+  MOCK_METHOD0(OnFrame, void());
+};
+
+class GamepadTest : public test::ExoTestBase {
+ public:
+  GamepadTest() {}
+
+  std::unique_ptr<device::GamepadDataFetcher> MockDataFetcherFactory() {
+    blink::WebGamepads initial_data;
+    std::unique_ptr<device::MockGamepadDataFetcher> fetcher(
+        new device::MockGamepadDataFetcher(initial_data));
+    mock_data_fetcher_ = fetcher.get();
+    return std::move(fetcher);
+  }
+
+  void InitializeGamepad(MockGamepadDelegate* delegate) {
+    polling_task_runner_ = new base::TestSimpleTaskRunner();
+    gamepad_.reset(new Gamepad(delegate, polling_task_runner_.get(),
+                               base::Bind(&GamepadTest::MockDataFetcherFactory,
+                                          base::Unretained(this))));
+    // Run the polling task runner to have it create the data fetcher.
+    polling_task_runner_->RunPendingTasks();
+  }
+
+  void DestroyGamepad(MockGamepadDelegate* delegate) {
+    EXPECT_CALL(*delegate, OnGamepadDestroying(testing::_)).Times(1);
+    mock_data_fetcher_ = nullptr;
+    gamepad_.reset();
+    // Process tasks until polling is shut down.
+    polling_task_runner_->RunPendingTasks();
+    polling_task_runner_ = nullptr;
+  }
+
+  void SetDataAndPostToDelegate(const blink::WebGamepads& new_data) {
+    ASSERT_TRUE(mock_data_fetcher_ != nullptr);
+    mock_data_fetcher_->SetTestData(new_data);
+    // Run one polling cycle, which will post a task to the origin task runner.
+    polling_task_runner_->RunPendingTasks();
+    // Run origin task runner to invoke delegate

[reveman, 2016/07/11 18:45:01]

nit: "invoke delegate."

[denniskempin, 2016/07/12 19:54:12]

Done.

+    base::MessageLoop::current()->RunUntilIdle();
+  }
+
+ protected:
+  std::unique_ptr<Gamepad> gamepad_;
+
+  // Task runner to simulate the polling thread.
+  scoped_refptr<base::TestSimpleTaskRunner> polling_task_runner_;
+
+  // Weak reference to the mock data fetcher provided by MockDataFetcherFactory.
+  // This instance is valid until both gamepad_ and polling_task_runner_ are
+  // shut down.
+  device::MockGamepadDataFetcher* mock_data_fetcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(GamepadTest);
+};
+
+TEST_F(GamepadTest, OnStateChange) {
+  std::unique_ptr<Surface> surface(new Surface);
+  std::unique_ptr<ShellSurface> shell_surface(new ShellSurface(surface.get()));
+  gfx::Size buffer_size(10, 10);
+  std::unique_ptr<Buffer> buffer(
+      new Buffer(exo_test_helper()->CreateGpuMemoryBuffer(buffer_size)));
+  surface->Attach(buffer.get());
+  surface->Commit();
+
+  testing::StrictMock<MockGamepadDelegate> delegate;
+  EXPECT_CALL(delegate, CanAcceptGamepadEventsForSurface(testing::_))
+      .WillOnce(testing::Return(true));
+
+  InitializeGamepad(&delegate);
+
+  // Gamepad connected.
+  EXPECT_CALL(delegate, OnStateChange(true)).Times(1);
+  blink::WebGamepads gamepad_connected;
+  gamepad_connected.length = 1;
+  gamepad_connected.items[0].connected = true;
+  gamepad_connected.items[0].timestamp = 1;
+  SetDataAndPostToDelegate(gamepad_connected);
+
+  // Gamepad disconnected.
+  blink::WebGamepads all_disconnected;
+  EXPECT_CALL(delegate, OnStateChange(false)).Times(1);
+  SetDataAndPostToDelegate(all_disconnected);
+
+  DestroyGamepad(&delegate);
+}
+
+TEST_F(GamepadTest, OnAxis) {
+  std::unique_ptr<Surface> surface(new Surface);
+  std::unique_ptr<ShellSurface> shell_surface(new ShellSurface(surface.get()));
+  gfx::Size buffer_size(10, 10);
+  std::unique_ptr<Buffer> buffer(
+      new Buffer(exo_test_helper()->CreateGpuMemoryBuffer(buffer_size)));
+  surface->Attach(buffer.get());
+  surface->Commit();
+
+  testing::StrictMock<MockGamepadDelegate> delegate;
+  EXPECT_CALL(delegate, CanAcceptGamepadEventsForSurface(testing::_))
+      .WillOnce(testing::Return(true));
+
+  InitializeGamepad(&delegate);
+
+  blink::WebGamepads axis_moved;
+  axis_moved.length = 1;
+  axis_moved.items[0].connected = true;
+  axis_moved.items[0].timestamp = 1;
+  axis_moved.items[0].axesLength = 1;
+  axis_moved.items[0].axes[0] = 1.0;
+
+  EXPECT_CALL(delegate, OnStateChange(true)).Times(1);
+  EXPECT_CALL(delegate, OnAxis(0, 1.0)).Times(1);
+  EXPECT_CALL(delegate, OnFrame()).Times(1);
+  SetDataAndPostToDelegate(axis_moved);
+
+  DestroyGamepad(&delegate);
+}
+
+TEST_F(GamepadTest, OnButton) {
+  std::unique_ptr<Surface> surface(new Surface);
+  std::unique_ptr<ShellSurface> shell_surface(new ShellSurface(surface.get()));
+  gfx::Size buffer_size(10, 10);
+  std::unique_ptr<Buffer> buffer(
+      new Buffer(exo_test_helper()->CreateGpuMemoryBuffer(buffer_size)));
+  surface->Attach(buffer.get());
+  surface->Commit();
+
+  testing::StrictMock<MockGamepadDelegate> delegate;
+  EXPECT_CALL(delegate, CanAcceptGamepadEventsForSurface(testing::_))
+      .WillOnce(testing::Return(true));
+
+  InitializeGamepad(&delegate);
+
+  blink::WebGamepads axis_moved;
+  axis_moved.length = 1;
+  axis_moved.items[0].connected = true;
+  axis_moved.items[0].timestamp = 1;
+  axis_moved.items[0].buttonsLength = 1;
+  axis_moved.items[0].buttons[0].pressed = true;
+  axis_moved.items[0].buttons[0].value = 1.0;
+
+  EXPECT_CALL(delegate, OnStateChange(true)).Times(1);
+  EXPECT_CALL(delegate, OnButton(0, true, 1.0)).Times(1);
+  EXPECT_CALL(delegate, OnFrame()).Times(1);
+  SetDataAndPostToDelegate(axis_moved);
+
+  DestroyGamepad(&delegate);
+}
+
+TEST_F(GamepadTest, OnWindowFocused) {
+  // Create surface and focus on it

[reveman, 2016/07/11 18:45:01]

nit: "focus on it." Maybe "and move focus to it."?

[denniskempin, 2016/07/12 19:54:12]

Done.

+  std::unique_ptr<Surface> surface(new Surface);
+  std::unique_ptr<ShellSurface> shell_surface(new ShellSurface(surface.get()));
+  gfx::Size buffer_size(10, 10);
+  std::unique_ptr<Buffer> buffer(
+      new Buffer(exo_test_helper()->CreateGpuMemoryBuffer(buffer_size)));
+  surface->Attach(buffer.get());
+  surface->Commit();
+
+  testing::StrictMock<MockGamepadDelegate> delegate;
+  EXPECT_CALL(delegate, CanAcceptGamepadEventsForSurface(testing::_))
+      .WillOnce(testing::Return(true));
+
+  InitializeGamepad(&delegate);
+
+  // In focus. Should be polling.
+  polling_task_runner_->RunPendingTasks();
+  ASSERT_TRUE(polling_task_runner_->HasPendingTask());
+  polling_task_runner_->RunPendingTasks();

[reveman, 2016/07/11 18:45:01]

why twice? looks like a typo. add a comment to explain why or remove..

[denniskempin, 2016/07/12 19:54:12]

added comment and turned into a loop. I just want to check a few times to make
sure we are actually polling indefinitely. 

+  ASSERT_TRUE(polling_task_runner_->HasPendingTask());
+
+  // Remove focus from exo window.

[reveman, 2016/07/11 18:45:01]

nit: s/exo window/window/

[denniskempin, 2016/07/12 19:54:13]

Done.

+  aura::client::FocusClient* focus_client =
+      aura::client::GetFocusClient(ash::Shell::GetPrimaryRootWindow());
+  focus_client->FocusWindow(nullptr);
+
+  // Run EnablePolling and OnPoll task, no more polls should be scheduled.
+  polling_task_runner_->RunPendingTasks();
+  polling_task_runner_->RunPendingTasks();

[reveman, 2016/07/11 18:45:01]

same here. why twice?

[denniskempin, 2016/07/12 19:54:12]

added comment. First round executes EnablePollingOnPollingThread, only then
polling will stop in the next round. 

+  ASSERT_FALSE(polling_task_runner_->HasPendingTask());
+
+  DestroyGamepad(&delegate);
+}
+
+}  // namespace
+}  // namespace exo