text: // Copyright (c) 2013 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/wm/dock/docked_window_resizer.h"
  
  #include "ash/ash_switches.h"
  #include "ash/root_window_controller.h"
  #include "ash/screen_util.h"
  #include "ash/shelf/shelf.h"
  #include "ash/shelf/shelf_layout_manager.h"
  #include "ash/shelf/shelf_model.h"
  #include "ash/shelf/shelf_types.h"
  #include "ash/shelf/shelf_widget.h"
  #include "ash/shell.h"
  #include "ash/shell_window_ids.h"
  #include "ash/test/ash_test_base.h"
  #include "ash/test/cursor_manager_test_api.h"
  #include "ash/test/shell_test_api.h"
  #include "ash/test/test_shelf_delegate.h"
  #include "ash/wm/coordinate_conversion.h"
  #include "ash/wm/dock/docked_window_layout_manager.h"
  #include "ash/wm/drag_window_resizer.h"
  #include "ash/wm/panels/panel_layout_manager.h"
  #include "ash/wm/window_state.h"
  #include "ash/wm/window_util.h"
  #include "ash/wm/wm_event.h"
  #include "base/command_line.h"
  #include "ui/aura/client/aura_constants.h"
  #include "ui/aura/client/window_tree_client.h"
  #include "ui/aura/test/event_generator.h"
  #include "ui/aura/test/test_window_delegate.h"
  #include "ui/aura/window_event_dispatcher.h"
  #include "ui/base/hit_test.h"
  #include "ui/base/ui_base_types.h"
  #include "ui/views/widget/widget.h"
  #include "ui/wm/core/window_util.h"
  
  namespace ash {
  namespace internal {
  
  class DockedWindowResizerTest
      : public test::AshTestBase,
        public testing::WithParamInterface<ui::wm::WindowType> {
   public:
    DockedWindowResizerTest() : model_(NULL), window_type_(GetParam()) {}
    virtual ~DockedWindowResizerTest() {}
  
    virtual void SetUp() OVERRIDE {
      AshTestBase::SetUp();
      UpdateDisplay("600x400");
      test::ShellTestApi test_api(Shell::GetInstance());
      model_ = test_api.shelf_model();
    }
  
    virtual void TearDown() OVERRIDE {
      AshTestBase::TearDown();
    }
  
   protected:
    enum DockedEdge {
      DOCKED_EDGE_NONE,
      DOCKED_EDGE_LEFT,
      DOCKED_EDGE_RIGHT,
    };
  
    int ideal_width() const { return DockedWindowLayoutManager::kIdealWidth; }
    int min_dock_gap() const { return DockedWindowLayoutManager::kMinDockGap; }
    int max_width() const { return DockedWindowLayoutManager::kMaxDockWidth; }
    int docked_width(const DockedWindowLayoutManager* layout_manager) const {
      return layout_manager->docked_width_;
    }
    int docked_alignment(const DockedWindowLayoutManager* layout_manager) const {
      return layout_manager->alignment_;
    }
    aura::Window* CreateTestWindow(const gfx::Rect& bounds) {
      aura::Window* window = CreateTestWindowInShellWithDelegateAndType(
          &delegate_,
          window_type_,
          0,
          bounds);
      if (window_type_ == ui::wm::WINDOW_TYPE_PANEL) {
        test::TestShelfDelegate* shelf_delegate =
            test::TestShelfDelegate::instance();
        shelf_delegate->AddShelfItem(window);
        PanelLayoutManager* manager =
            static_cast<PanelLayoutManager*>(
                Shell::GetContainer(window->GetRootWindow(),
                                    internal::kShellWindowId_PanelContainer)->
                    layout_manager());
        manager->Relayout();
      }
      return window;
    }
  
    aura::Window* CreateModalWindow(const gfx::Rect& bounds) {
      aura::Window* window = new aura::Window(&delegate_);
      window->SetProperty(aura::client::kModalKey, ui::MODAL_TYPE_SYSTEM);
      window->SetType(ui::wm::WINDOW_TYPE_NORMAL);
      window->Init(aura::WINDOW_LAYER_TEXTURED);
      window->Show();
  
      if (bounds.IsEmpty()) {
        ParentWindowInPrimaryRootWindow(window);
      } else {
        gfx::Display display =
            Shell::GetScreen()->GetDisplayMatching(bounds);
        aura::Window* root = ash::Shell::GetInstance()->display_controller()->
            GetRootWindowForDisplayId(display.id());
        gfx::Point origin = bounds.origin();
        wm::ConvertPointFromScreen(root, &origin);
        window->SetBounds(gfx::Rect(origin, bounds.size()));
        aura::client::ParentWindowWithContext(window, root, bounds);
      }
      return window;
    }
  
    static WindowResizer* CreateSomeWindowResizer(
        aura::Window* window,
        const gfx::Point& point_in_parent,
        int window_component) {
      return CreateWindowResizer(
          window,
          point_in_parent,
          window_component,
          aura::client::WINDOW_MOVE_SOURCE_MOUSE).release();
    }
  
    void DragStart(aura::Window* window) {
      DragStartAtOffsetFromWindowOrigin(window, 0, 0);
    }
  
    void DragStartAtOffsetFromWindowOrigin(aura::Window* window,
                                           int dx, int dy) {
      initial_location_in_parent_ =
          window->bounds().origin() + gfx::Vector2d(dx, dy);
      resizer_.reset(CreateSomeWindowResizer(window,
                                             initial_location_in_parent_,
                                             HTCAPTION));
      ASSERT_TRUE(resizer_.get());
    }
  
    void ResizeStartAtOffsetFromWindowOrigin(aura::Window* window,
                                             int dx, int dy,
                                             int window_component) {
      initial_location_in_parent_ =
          window->bounds().origin() + gfx::Vector2d(dx, dy);
      resizer_.reset(CreateSomeWindowResizer(window,
                                             initial_location_in_parent_,
                                             window_component));
      ASSERT_TRUE(resizer_.get());
    }
  
    void DragMove(int dx, int dy) {
      resizer_->Drag(initial_location_in_parent_ + gfx::Vector2d(dx, dy), 0);
    }
  
    void DragEnd() {
      resizer_->CompleteDrag();
      resizer_.reset();
    }
  
    void DragRevert() {
      resizer_->RevertDrag();
      resizer_.reset();
    }
  
    // Panels are parented by panel container during drags.
    // All other windows that are tested here are parented by dock container
    // during drags.
    int CorrectContainerIdDuringDrag() {
      if (window_type_ == ui::wm::WINDOW_TYPE_PANEL)
        return internal::kShellWindowId_PanelContainer;
      return internal::kShellWindowId_DockedContainer;
    }
  
    // Test dragging the window vertically (to detach if it is a panel) and then
    // horizontally to the edge with an added offset from the edge of |dx|.
    void DragRelativeToEdge(DockedEdge edge,
                            aura::Window* window,
                            int dx) {
      DragVerticallyAndRelativeToEdge(
          edge,
          window,
          dx,
          window_type_ == ui::wm::WINDOW_TYPE_PANEL ? -100 : 20,
          25,
          5);
    }
  
    void DragToVerticalPositionAndToEdge(DockedEdge edge,
                                         aura::Window* window,
                                         int y) {
      DragToVerticalPositionRelativeToEdge(edge, window, 0, y);
    }
  
    void DragToVerticalPositionRelativeToEdge(DockedEdge edge,
                                              aura::Window* window,
                                              int dx,
                                              int y) {
      gfx::Rect initial_bounds = window->GetBoundsInScreen();
      DragVerticallyAndRelativeToEdge(edge,
                                      window,
                                      dx, y - initial_bounds.y(),
                                      25, 5);
    }
  
    // Detach if our window is a panel, then drag it vertically by |dy| and
    // horizontally to the edge with an added offset from the edge of |dx|.
    void DragVerticallyAndRelativeToEdge(DockedEdge edge,
                                         aura::Window* window,
                                         int dx, int dy,
                                         int grab_x, int grab_y) {
      gfx::Rect initial_bounds = window->GetBoundsInScreen();
      // avoid snap by clicking away from the border
      ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(window,
                                                                grab_x, grab_y));
  
      gfx::Rect work_area =
          Shell::GetScreen()->GetDisplayNearestWindow(window).work_area();
      gfx::Point initial_location_in_screen = initial_location_in_parent_;
      wm::ConvertPointToScreen(window->parent(), &initial_location_in_screen);
      // Drag the window left or right to the edge (or almost to it).
      if (edge == DOCKED_EDGE_LEFT)
        dx += work_area.x() - initial_location_in_screen.x();
      else if (edge == DOCKED_EDGE_RIGHT)
        dx += work_area.right() - 1 - initial_location_in_screen.x();
      DragMove(dx, dy);
      EXPECT_EQ(CorrectContainerIdDuringDrag(), window->parent()->id());
      // Release the mouse and the panel should be attached to the dock.
      DragEnd();
  
      // x-coordinate can get adjusted by snapping or sticking.
      // y-coordinate could be changed by possible automatic layout if docked.
      if (window->parent()->id() != internal::kShellWindowId_DockedContainer &&
          !wm::GetWindowState(window)->HasRestoreBounds()) {
        EXPECT_EQ(initial_bounds.y() + dy, window->GetBoundsInScreen().y());
      }
    }
  
    bool test_panels() const { return window_type_ == ui::wm::WINDOW_TYPE_PANEL; }
  
    aura::test::TestWindowDelegate* delegate() {
      return &delegate_;
    }
  
    const gfx::Point& initial_location_in_parent() const {
      return initial_location_in_parent_;
    }
  
   private:
    scoped_ptr<WindowResizer> resizer_;
    ShelfModel* model_;
    ui::wm::WindowType window_type_;
    aura::test::TestWindowDelegate delegate_;
  
    // Location at start of the drag in |window->parent()|'s coordinates.
    gfx::Point initial_location_in_parent_;
  
    DISALLOW_COPY_AND_ASSIGN(DockedWindowResizerTest);
  };
  
  // Verifies a window can be dragged and attached to the dock.
  TEST_P(DockedWindowResizerTest, AttachRightPrecise) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
  
    // The window should be docked at the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  }
  
  // Verifies a window can be dragged and attached to the dock
  // even if pointer overshoots the screen edge by a few pixels (sticky edge)
  TEST_P(DockedWindowResizerTest, AttachRightOvershoot) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), +4);
  
    // The window should be docked at the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  }
  
  // Verifies a window can be dragged and then if a pointer is not quite reaching
  // the screen edge the window does not get docked and stays in the desktop.
  TEST_P(DockedWindowResizerTest, AttachRightUndershoot) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    // Grabbing at 70px ensures that at least 30% of the window is in screen,
    // otherwise the window would be adjusted in
    // WorkspaceLayoutManager::AdjustWindowBoundsWhenAdded.
    const int kGrabOffsetX = 70;
    const int kUndershootBy = 1;
    DragVerticallyAndRelativeToEdge(DOCKED_EDGE_RIGHT,
                                    window.get(),
                                    -kUndershootBy, test_panels() ? -100 : 20,
                                    kGrabOffsetX, 5);
  
    // The window right should be past the screen edge but not docked.
    // Initial touch point is 70px to the right which helps to find where the edge
    // should be.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right() +
              window->bounds().width() - kGrabOffsetX - kUndershootBy - 1,
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer,
              window->parent()->id());
  }
  
  // Verifies a window can be dragged and attached to the dock.
  TEST_P(DockedWindowResizerTest, AttachLeftPrecise) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragRelativeToEdge(DOCKED_EDGE_LEFT, window.get(), 0);
  
    // The window should be docked at the left edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().x(),
              window->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  }
  
  // Verifies a window can be dragged and attached to the dock
  // even if pointer overshoots the screen edge by a few pixels (sticky edge)
  TEST_P(DockedWindowResizerTest, AttachLeftOvershoot) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragRelativeToEdge(DOCKED_EDGE_LEFT, window.get(), -4);
  
    // The window should be docked at the left edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().x(),
              window->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  }
  
  // Verifies a window can be dragged and then if a pointer is not quite reaching
  // the screen edge the window does not get docked and stays in the desktop.
  TEST_P(DockedWindowResizerTest, AttachLeftUndershoot) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    gfx::Rect initial_bounds(window->bounds());
    DragRelativeToEdge(DOCKED_EDGE_LEFT, window.get(), 1);
  
    // The window should be crossing the screen edge but not docked.
    int expected_x = initial_bounds.x() - initial_location_in_parent().x() + 1;
    EXPECT_EQ(expected_x, window->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer,
              window->parent()->id());
  }
  
  // Dock on the right side, change shelf alignment, check that windows move to
  // the opposite side.
  TEST_P(DockedWindowResizerTest, AttachRightChangeShelf) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
  
    // The window should be docked at the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    // set launcher shelf to be aligned on the right
    ash::Shell* shell = ash::Shell::GetInstance();
    shell->SetShelfAlignment(SHELF_ALIGNMENT_RIGHT,
                             shell->GetPrimaryRootWindow());
    // The window should have moved and get attached to the left dock.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().x(),
              window->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    // set launcher shelf to be aligned on the left
    shell->SetShelfAlignment(SHELF_ALIGNMENT_LEFT,
                             shell->GetPrimaryRootWindow());
    // The window should have moved and get attached to the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    // set launcher shelf to be aligned at the bottom
    shell->SetShelfAlignment(SHELF_ALIGNMENT_BOTTOM,
                             shell->GetPrimaryRootWindow());
    // The window should stay in the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  }
  
  // Dock on the right side, try to undock, then drag more to really undock
  TEST_P(DockedWindowResizerTest, AttachTryDetach) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(
        gfx::Rect(0, 0, ideal_width() + 10, 201)));
    DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
  
    // The window should be docked at the right edge.
    // Its width should shrink to ideal width.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(ideal_width(), window->GetBoundsInScreen().width());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    // Try to detach by dragging left less than kSnapToDockDistance.
    // The window should stay docked.
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(
        window.get(), 10, 0));
    DragMove(-4, -10);
    // Release the mouse and the window should be still attached to the dock.
    DragEnd();
  
    // The window should be still attached to the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    // Try to detach by dragging left by kSnapToDockDistance or more.
    // The window should get undocked.
    const int left_edge = window->bounds().x();
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(
        window.get(), 10, 0));
    DragMove(-32, -10);
    // Release the mouse and the window should be no longer attached to the dock.
    DragEnd();
  
    // The window should be floating on the desktop again and moved to the left.
    EXPECT_EQ(left_edge - 32, window->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer,
              window->parent()->id());
  }
  
  // Dock on the right side, and undock by dragging the right edge of the window
  // header. This test is useful because both the position of the dragged window
  // and the position of the mouse are used in determining whether a window should
  // be undocked.
  TEST_P(DockedWindowResizerTest, AttachTryDetachDragRightEdgeOfHeader) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(
        gfx::Rect(0, 0, ideal_width() + 10, 201)));
    DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
  
    // The window should be docked at the right edge.
    // Its width should shrink to ideal width.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(ideal_width(), window->GetBoundsInScreen().width());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    // Try to detach by dragging left less than kSnapToDockDistance.
    // The window should stay docked.
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(
        window.get(), ideal_width() - 10, 0));
    DragMove(-4, -10);
    // Release the mouse and the window should be still attached to the dock.
    DragEnd();
  
    // The window should be still attached to the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    // Try to detach by dragging left by kSnapToDockDistance or more.
    // The window should get undocked.
    const int left_edge = window->bounds().x();
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(
        window.get(), ideal_width() - 10, 0));
    DragMove(-32, -10);
    // Release the mouse and the window should be no longer attached to the dock.
    DragEnd();
  
    // The window should be floating on the desktop again and moved to the left.
    EXPECT_EQ(left_edge - 32, window->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer,
              window->parent()->id());
  }
  
  // Minimize a docked window, then restore it and check that it is still docked.
  TEST_P(DockedWindowResizerTest, AttachMinimizeRestore) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
  
    // The window should be docked at the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    wm::WindowState* window_state = wm::GetWindowState(window.get());
    // Minimize the window, it should be hidden.
    window_state->Minimize();
    RunAllPendingInMessageLoop();
    EXPECT_FALSE(window->IsVisible());
    EXPECT_TRUE(window_state->IsMinimized());
    // Restore the window; window should be visible.
    window_state->Restore();
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(window->IsVisible());
    EXPECT_TRUE(window_state->IsNormalStateType());
  }
  
  // Maximize a docked window and check that it is maximized and no longer docked.
  TEST_P(DockedWindowResizerTest, AttachMaximize) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
  
    // The window should be docked at the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    wm::WindowState* window_state = wm::GetWindowState(window.get());
    // Maximize the window, it should get undocked and maximized in a desktop.
    window_state->Maximize();
    RunAllPendingInMessageLoop();
    EXPECT_TRUE(window->IsVisible());
    EXPECT_TRUE(window_state->IsMaximized());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, window->parent()->id());
  }
  
  // Dock two windows, undock one, check that the other one is still docked.
  TEST_P(DockedWindowResizerTest, AttachTwoWindows) {
    if (!SupportsHostWindowResize())
      return;
    UpdateDisplay("600x600");
  
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    scoped_ptr<aura::Window> w2(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w2.get(), 50);
  
    // Docking second window should not minimize the first.
    wm::WindowState* window_state1 = wm::GetWindowState(w1.get());
    EXPECT_FALSE(window_state1->IsMinimized());
  
    // Both windows should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
  
    EXPECT_EQ(w2->GetRootWindow()->GetBoundsInScreen().right(),
              w2->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
  
    // Detach by dragging left (should get undocked).
    const int left_edge = w2->bounds().x();
    ASSERT_NO_FATAL_FAILURE(DragStart(w2.get()));
    // Drag up as well to avoid attaching panels to launcher shelf.
    DragMove(-32, -100);
    // Release the mouse and the window should be no longer attached to the edge.
    DragEnd();
  
    // The first window should be still docked.
    EXPECT_FALSE(window_state1->IsMinimized());
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
  
    // The window should be floating on the desktop again and moved to the left.
    EXPECT_EQ(left_edge - 32, w2->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer,
              w2->parent()->id());
  }
  
  // Create two windows, dock one and change shelf to auto-hide.
  TEST_P(DockedWindowResizerTest, AttachOneAutoHideShelf) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
  
    // w1 should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
  
    scoped_ptr<aura::Window> w2(CreateTestWindowInShellWithDelegateAndType(
        NULL, ui::wm::WINDOW_TYPE_NORMAL, 0, gfx::Rect(20, 20, 150, 20)));
    wm::GetWindowState(w2.get())->Maximize();
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w2->parent()->id());
    EXPECT_TRUE(wm::GetWindowState(w2.get())->IsMaximized());
  
    gfx::Rect work_area =
        Shell::GetScreen()->GetDisplayNearestWindow(w1.get()).work_area();
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(w1->parent()->layout_manager());
  
    // Docked window should be centered vertically in the work area.
    EXPECT_EQ(work_area.CenterPoint().y(), w1->bounds().CenterPoint().y());
    // Docked background should extend to the bottom of work area.
    EXPECT_EQ(work_area.bottom(), manager->docked_bounds().bottom());
  
    // set launcher shelf to be aligned on the right
    ash::Shell* shell = ash::Shell::GetInstance();
    shell->SetShelfAutoHideBehavior(SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS,
                                    shell->GetPrimaryRootWindow());
    work_area =
          Shell::GetScreen()->GetDisplayNearestWindow(w1.get()).work_area();
    // Docked window should be centered vertically in the work area.
    EXPECT_EQ(work_area.CenterPoint().y(), w1->bounds().CenterPoint().y());
    // Docked background should extend to the bottom of work area.
    EXPECT_EQ(work_area.bottom(), manager->docked_bounds().bottom());
  }
  
  // Dock one window, try to dock another window on the opposite side (should not
  // dock).
  TEST_P(DockedWindowResizerTest, AttachOnTwoSides) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    scoped_ptr<aura::Window> w2(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    gfx::Rect initial_bounds(w2->bounds());
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_LEFT, w2.get(), 50);
  
    // The first window should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
  
    // The second window should be near the left edge but not snapped.
    // Normal window will get side-maximized while panels will not.
    int expected_x = test_panels() ?
        (initial_bounds.x() - initial_location_in_parent().x()) : 0;
    EXPECT_EQ(expected_x, w2->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w2->parent()->id());
  }
  
  // Tests that reverting a drag restores docked state if a window was docked.
  TEST_P(DockedWindowResizerTest, RevertDragRestoresAttachment) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
  
    // The window should be docked at the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    // Drag the window out but revert the drag
    ASSERT_NO_FATAL_FAILURE(DragStart(window.get()));
    DragMove(-50, 0);
    DragRevert();
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    // Detach window.
    ASSERT_NO_FATAL_FAILURE(DragStart(window.get()));
    DragMove(-50, 0);
    DragEnd();
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer,
              window->parent()->id());
  }
  
  // Tests that reverting drag restores undocked state if a window was not docked.
  TEST_P(DockedWindowResizerTest, RevertDockedDragRevertsAttachment) {
    if (!SupportsHostWindowResize())
      return;
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    aura::Window* dock_container = Shell::GetContainer(
        window->GetRootWindow(),
        kShellWindowId_DockedContainer);
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(dock_container->layout_manager());
    int previous_container_id = window->parent()->id();
    // Drag the window out but revert the drag
    ASSERT_NO_FATAL_FAILURE(DragStart(window.get()));
    DragMove(-50 - window->bounds().x(), 50 - window->bounds().y());
    EXPECT_EQ(CorrectContainerIdDuringDrag(), window->parent()->id());
    DragRevert();
    EXPECT_EQ(previous_container_id, window->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
  
    // Drag a window to the left so that it overlaps the screen edge.
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(
        window.get(),
        window->bounds().width()/2 + 10,
        0));
    DragMove(-50 - window->bounds().x(), 50 - window->bounds().y());
    DragEnd();
    // The window now overlaps the left screen edge but is not docked.
    EXPECT_EQ(kShellWindowId_DefaultContainer, window->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
    EXPECT_LT(window->bounds().x(), 0);
    EXPECT_GT(window->bounds().right(), 0);
  
    // Drag the window further left and revert the drag.
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(
        window.get(),
        window->bounds().width()/2 + 10,
        0));
    DragMove(-10, 10);
    DragRevert();
    // The window should be in default container and not docked.
    EXPECT_EQ(kShellWindowId_DefaultContainer, window->parent()->id());
    // Docked area alignment should be cleared.
    EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
  }
  
  // Move a docked window to the second display
  TEST_P(DockedWindowResizerTest, DragAcrossDisplays) {
    if (!SupportsMultipleDisplays())
      return;
  
    UpdateDisplay("800x800,800x800");
    aura::Window::Windows root_windows = Shell::GetAllRootWindows();
    EXPECT_EQ(2, static_cast<int>(root_windows.size()));
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    gfx::Rect initial_bounds = window->GetBoundsInScreen();
    EXPECT_EQ(root_windows[0], window->GetRootWindow());
  
    DragRelativeToEdge(DOCKED_EDGE_RIGHT, window.get(), 0);
    // The window should be docked at the right edge.
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
  
    // Try dragging to the right - enough to get it peeking at the other screen
    // but not enough to land in the other screen.
    // The window should stay on the left screen.
    ASSERT_NO_FATAL_FAILURE(DragStart(window.get()));
    DragMove(100, 0);
    EXPECT_EQ(CorrectContainerIdDuringDrag(), window->parent()->id());
    DragEnd();
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer,
              window->parent()->id());
    EXPECT_EQ(root_windows[0], window->GetRootWindow());
  
    // Undock and move to the right - enough to get the mouse pointer past the
    // edge of the screen and into the second screen. The window should now be
    // in the second screen and not docked.
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(
        window.get(),
        window->bounds().width()/2 + 10,
        0));
    DragMove(window->bounds().width()/2 - 5, 0);
    EXPECT_EQ(CorrectContainerIdDuringDrag(), window->parent()->id());
    DragEnd();
    EXPECT_NE(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer,
              window->parent()->id());
    EXPECT_EQ(root_windows[1], window->GetRootWindow());
  
    // Keep dragging it to the right until its left edge touches the screen edge.
    // The window should now be in the second screen and not docked.
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(
        window.get(),
        window->bounds().width()/2 + 10,
        0));
    DragMove(window->GetRootWindow()->GetBoundsInScreen().x() -
             window->GetBoundsInScreen().x(),
             0);
    EXPECT_EQ(CorrectContainerIdDuringDrag(), window->parent()->id());
    DragEnd();
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().x(),
              window->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, window->parent()->id());
    EXPECT_EQ(root_windows[1], window->GetRootWindow());
  }
  
  // Dock two windows, undock one.
  // Test the docked windows area size and default container resizing.
  TEST_P(DockedWindowResizerTest, AttachTwoWindowsDetachOne) {
    if (!SupportsHostWindowResize())
      return;
    UpdateDisplay("600x600");
  
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    scoped_ptr<aura::Window> w2(CreateTestWindow(gfx::Rect(0, 0, 210, 201)));
    // Work area should cover the whole screen.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w2.get()).width());
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    // A window should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(w1->parent()->layout_manager());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w2.get(), 100);
    // Both windows should now be docked at the right edge.
    EXPECT_EQ(w2->GetRootWindow()->GetBoundsInScreen().right(),
              w2->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
    // Dock width should be set to a wider window.
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(std::max(w1->bounds().width(), w2->bounds().width()),
              docked_width(manager));
  
    // Try to detach by dragging left a bit (should not get undocked).
    // This would normally detach a single docked window but since we have another
    // window and the mouse pointer does not leave the dock area the window
    // should stay docked.
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(w2.get(), 60, 0));
    // Drag up as well as left to avoid attaching panels to launcher shelf.
    DragMove(-40, -40);
    // Release the mouse and the window should be still attached to the edge.
    DragEnd();
  
    // The first window should be still docked.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
  
    // The second window should be still docked.
    EXPECT_EQ(w2->GetRootWindow()->GetBoundsInScreen().right(),
              w2->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
  
    // Detach by dragging left more (should get undocked).
    const int left_edge = w2->bounds().x();
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(
        w2.get(),
        w2->bounds().width()/2 + 10,
        0));
    // Drag up as well to avoid attaching panels to launcher shelf.
    const int drag_x = -(w2->bounds().width()/2 + 20);
    DragMove(drag_x, -100);
    // Release the mouse and the window should be no longer attached to the edge.
    DragEnd();
  
    // The second window should be floating on the desktop again.
    EXPECT_EQ(left_edge + drag_x, w2->bounds().x());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w2->parent()->id());
    // Dock width should be set to remaining single docked window.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  }
  
  // Dock one of the windows. Maximize other testing desktop resizing.
  TEST_P(DockedWindowResizerTest, AttachWindowMaximizeOther) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    scoped_ptr<aura::Window> w2(CreateTestWindow(gfx::Rect(0, 0, 210, 201)));
    // Work area should cover the whole screen.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w2.get()).width());
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    // A window should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(w1->parent()->layout_manager());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(w2.get(), 25, 5));
    DragMove(w2->GetRootWindow()->bounds().width()
             -w2->bounds().width()
             -(w2->bounds().width()/2 + 20)
             -w2->bounds().x(),
             50 - w2->bounds().y());
    DragEnd();
    // The first window should be still docked.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
  
    // The second window should be floating on the desktop.
    EXPECT_EQ(w2->GetRootWindow()->GetBoundsInScreen().right() -
              (w2->bounds().width()/2 + 20),
              w2->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w2->parent()->id());
    // Dock width should be set to remaining single docked window.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
    // Desktop work area should now shrink.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width() -
              docked_width(manager) - min_dock_gap(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w2.get()).width());
  
    // Maximize the second window - Maximized area should be shrunk.
    const gfx::Rect restored_bounds = w2->bounds();
    wm::WindowState* w2_state = wm::GetWindowState(w2.get());
    w2_state->Maximize();
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width() -
              docked_width(manager) - min_dock_gap(),
              w2->bounds().width());
  
    // Detach the first window (this should require very little drag).
    ASSERT_NO_FATAL_FAILURE(DragStart(w1.get()));
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    DragMove(-35, 10);
    // Alignment is set to "NONE" when drag starts.
    EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
    // Release the mouse and the window should be no longer attached to the edge.
    DragEnd();
    EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
    // Dock should get shrunk and desktop should get expanded.
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w1->parent()->id());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w2->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
    EXPECT_EQ(0, docked_width(manager));
    // The second window should now get resized and take up the whole screen.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width(),
              w2->bounds().width());
  
    // Dock the first window to the left edge.
    // Click at an offset from origin to prevent snapping.
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(w1.get(), 10, 0));
    // Drag left to get pointer touching the screen edge.
    DragMove(-w1->bounds().x() - 10, 0);
    // Alignment set to "NONE" during the drag of the window when none are docked.
    EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
    // Release the mouse and the window should be now attached to the edge.
    DragEnd();
    // Dock should get expanded and desktop should get shrunk.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_LEFT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
    // Second window should still be in the desktop.
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w2->parent()->id());
    // Maximized window should be shrunk.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width() -
              docked_width(manager) - min_dock_gap(),
              w2->bounds().width());
  
    // Unmaximize the second window.
    w2_state->Restore();
    // Its bounds should get restored.
    EXPECT_EQ(restored_bounds, w2->bounds());
  }
  
  // Dock one window. Test the sticky behavior near screen or desktop edge.
  TEST_P(DockedWindowResizerTest, AttachOneTestSticky) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    scoped_ptr<aura::Window> w2(CreateTestWindow(gfx::Rect(0, 0, 210, 201)));
    // Work area should cover the whole screen.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w2.get()).width());
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_LEFT, w1.get(), 20);
    // A window should be docked at the left edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().x(),
              w1->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(w1->parent()->layout_manager());
    // The first window should be docked.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().x(),
              w1->GetBoundsInScreen().x());
    // Dock width should be set to that of a single docked window.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_LEFT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    // Position second window in the desktop 20px to the right of the docked w1.
    DragToVerticalPositionRelativeToEdge(DOCKED_EDGE_LEFT,
                                         w2.get(),
                                         20 + 25 -
                                         min_dock_gap(),
                                         50);
    // The second window should be floating on the desktop.
    EXPECT_EQ(w2->GetRootWindow()->GetBoundsInScreen().x() +
                  (w1->bounds().right() + 20),
              w2->GetBoundsInScreen().x());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w2->parent()->id());
    // Dock width should be set to that of a single docked window.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_LEFT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    // Drag w2 almost to the dock, the mouse pointer not quite reaching the dock.
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(w2.get(), 10, 0));
    DragMove(1 + docked_width(manager) - w2->bounds().x(), 0);
    // Alignment set to "LEFT" during the drag because dock has a window in it.
    EXPECT_EQ(DOCKED_ALIGNMENT_LEFT, docked_alignment(manager));
    // Release the mouse and the window should not be attached to the edge.
    DragEnd();
    // Dock should still have only one window in it.
    EXPECT_EQ(DOCKED_ALIGNMENT_LEFT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
    // The second window should still be in the desktop.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w2->parent()->id());
  
    // Drag w2 by a bit more - it should resist the drag (stuck edges)
    int start_x = w2->bounds().x();
    ASSERT_NO_FATAL_FAILURE(DragStartAtOffsetFromWindowOrigin(w2.get(), 100, 5));
    DragMove(-2, 0);
    // Window should not actually move.
    EXPECT_EQ(start_x, w2->bounds().x());
    // Alignment set to "LEFT" during the drag because dock has a window in it.
    EXPECT_EQ(DOCKED_ALIGNMENT_LEFT, docked_alignment(manager));
    // Release the mouse and the window should not be attached to the edge.
    DragEnd();
    // Window should be still where it was before the last drag started.
    EXPECT_EQ(start_x, w2->bounds().x());
    // Dock should still have only one window in it
    EXPECT_EQ(DOCKED_ALIGNMENT_LEFT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
    // The second window should still be in the desktop
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w2->parent()->id());
  
    // Drag w2 by more than the stuck threshold and drop it into the dock.
    ASSERT_NO_FATAL_FAILURE(DragStart(w2.get()));
    DragMove(-100, 0);
    // Window should actually move.
    EXPECT_NE(start_x, w2->bounds().x());
    // Alignment set to "LEFT" during the drag because dock has a window in it.
    EXPECT_EQ(DOCKED_ALIGNMENT_LEFT, docked_alignment(manager));
    // Release the mouse and the window should be attached to the edge.
    DragEnd();
    // Both windows are docked now.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
    // Dock should get expanded and desktop should get shrunk.
    EXPECT_EQ(DOCKED_ALIGNMENT_LEFT, docked_alignment(manager));
    EXPECT_EQ(std::max(w1->bounds().width(), w2->bounds().width()),
              docked_width(manager));
    // Desktop work area should now shrink by dock width.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width() -
              docked_width(manager) - min_dock_gap(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w2.get()).width());
  }
  
  // Dock two windows, resize one.
  // Test the docked windows area size and remaining desktop resizing.
  TEST_P(DockedWindowResizerTest, ResizeOneOfTwoWindows) {
    if (!SupportsHostWindowResize())
      return;
  
    // Wider display to start since panels are limited to half the display width.
    UpdateDisplay("1000x600");
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    scoped_ptr<aura::Window> w2(CreateTestWindow(gfx::Rect(0, 0, 210, 201)));
    // Work area should cover the whole screen.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w2.get()).width());
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    // A window should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(w1->parent()->layout_manager());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w2.get(), 100);
    // Both windows should now be docked at the right edge.
    EXPECT_EQ(w2->GetRootWindow()->GetBoundsInScreen().right(),
              w2->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
    // Dock width should be set to a wider window.
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(std::max(w1->bounds().width(), w2->bounds().width()),
              docked_width(manager));
  
    // Resize the first window left by a bit and test that the dock expands.
    int previous_width = w1->bounds().width();
    const int kResizeSpan1 = 30;
    ASSERT_NO_FATAL_FAILURE(ResizeStartAtOffsetFromWindowOrigin(w1.get(),
                                                                0, 20,
                                                                HTLEFT));
    DragMove(-kResizeSpan1, 0);
    // Alignment set to "RIGHT" during the drag because dock has a window in it.
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // Release the mouse and the window should be attached to the edge.
    DragEnd();
    // Dock should still have both windows in it.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // w1 is now wider than before. The dock should expand and be as wide as w1.
    EXPECT_EQ(previous_width + kResizeSpan1, w1->bounds().width());
    // Both windows should get resized since they both don't have min/max size.
    EXPECT_EQ(w1->bounds().width(), w2->bounds().width());
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
    // Desktop work area should shrink.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width() -
              docked_width(manager) - min_dock_gap(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w2.get()).width());
  
    // Resize the first window left by more than the dock maximum width.
    // This should cause the window width to be restricted by maximum dock width.
    previous_width = w1->bounds().width();
    const int kResizeSpan2 = 250;
    ASSERT_NO_FATAL_FAILURE(ResizeStartAtOffsetFromWindowOrigin(w1.get(),
                                                                0, 20,
                                                                HTLEFT));
    DragMove(-kResizeSpan2, 0);
    // Alignment set to "RIGHT" during the drag because dock has a window in it.
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // Release the mouse and the window should be attached to the edge.
    DragEnd();
    // Dock should still have both windows in it.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // w1 is now as wide as the maximum dock width and the dock should get
    // resized to the maximum width.
    EXPECT_EQ(max_width(), w1->bounds().width());
    // Both windows should get resized since they both don't have min/max size.
    EXPECT_EQ(w1->bounds().width(), w2->bounds().width());
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
    // Desktop work area should shrink.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width() -
              docked_width(manager) - min_dock_gap(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w2.get()).width());
  
    // Resize the first window right to get it completely inside the docked area.
    previous_width = w1->bounds().width();
    const int kResizeSpan3 = 100;
    ASSERT_NO_FATAL_FAILURE(ResizeStartAtOffsetFromWindowOrigin(w1.get(),
                                                                0, 20,
                                                                HTLEFT));
    DragMove(kResizeSpan3, 0);
    // Alignment set to "RIGHT" during the drag because dock has a window in it.
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // Release the mouse and the window should be docked.
    DragEnd();
    // Dock should still have both windows in it.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // w1 should be narrower than before by the length of the drag.
    EXPECT_EQ(previous_width - kResizeSpan3, w1->bounds().width());
    // Both windows should get resized since they both don't have min/max size.
    EXPECT_EQ(w1->bounds().width(), w2->bounds().width());
    // The dock should be as wide as w1 or w2.
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
    // Desktop work area should shrink.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w2.get()).width() -
              docked_width(manager) - min_dock_gap(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w2.get()).width());
  
    // Resize the first window left to be overhang again.
    previous_width = w1->bounds().width();
    ASSERT_NO_FATAL_FAILURE(ResizeStartAtOffsetFromWindowOrigin(w1.get(),
                                                                0, 20,
                                                                HTLEFT));
    DragMove(-kResizeSpan3, 0);
    DragEnd();
    EXPECT_EQ(previous_width + kResizeSpan3, w1->bounds().width());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    // Docked area should be as wide as possible (maximum) and same as w1.
    EXPECT_EQ(max_width(), docked_width(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    // Undock the first window. Docked area should shrink to its ideal size.
    ASSERT_NO_FATAL_FAILURE(DragStart(w1.get()));
    // Drag up as well to avoid attaching panels to launcher shelf.
    DragMove(-(400 - 210), -100);
    // Alignment set to "RIGHT" since we have another window docked.
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // Release the mouse and the window should be no longer attached to the edge.
    DragEnd();
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w1->parent()->id());
    // Dock should be as wide as w2 (and same as ideal width).
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(ideal_width(), docked_width(manager));
    EXPECT_EQ(w2->bounds().width(), docked_width(manager));
    // The second window should be still docked.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
    // Desktop work area should be inset.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w1.get()).width() -
              docked_width(manager) - min_dock_gap(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w1.get()).width());
  }
  
  // Dock a window, resize it and test that undocking it preserves the width.
  TEST_P(DockedWindowResizerTest, ResizingKeepsWidth) {
    if (!SupportsHostWindowResize())
      return;
  
    // Wider display to start since panels are limited to half the display width.
    UpdateDisplay("1000x600");
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    // Window should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(w1->parent()->layout_manager());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    // Resize the window left by a bit and test that the dock expands.
    int previous_width = w1->bounds().width();
    const int kResizeSpan1 = 30;
    ASSERT_NO_FATAL_FAILURE(ResizeStartAtOffsetFromWindowOrigin(w1.get(),
                                                                0, 20,
                                                                HTLEFT));
    DragMove(-kResizeSpan1, 0);
    // Alignment stays "RIGHT" during the drag because the only docked window
    // is being resized.
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // Release the mouse and the window should be attached to the edge.
    DragEnd();
    // The window should get docked.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // w1 is now wider and the dock should expand to be as wide as w1.
    EXPECT_EQ(previous_width + kResizeSpan1, w1->bounds().width());
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    // Undock by dragging almost to the left edge.
    DragToVerticalPositionRelativeToEdge(DOCKED_EDGE_LEFT, w1.get(), 100, 20);
    // Width should be preserved.
    EXPECT_EQ(previous_width + kResizeSpan1, w1->bounds().width());
    // Height should be restored to what it was originally.
    EXPECT_EQ(201, w1->bounds().height());
  
    // Dock again.
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    // Width should be reset to initial ideal width (25px).
    EXPECT_EQ(ideal_width(), w1->bounds().width());
  
    // Undock again by dragging left.
    DragToVerticalPositionRelativeToEdge(DOCKED_EDGE_LEFT, w1.get(), 100, 20);
    // Width should be reset to what it was last time the window was not docked.
    EXPECT_EQ(previous_width + kResizeSpan1, w1->bounds().width());
    // Height should be restored to what it was originally.
    EXPECT_EQ(201, w1->bounds().height());
  }
  
  // Dock a window, resize it and test that it stays docked.
  TEST_P(DockedWindowResizerTest, ResizingKeepsDockedState) {
    if (!SupportsHostWindowResize())
      return;
  
    // Wider display to start since panels are limited to half the display width.
    UpdateDisplay("1000x600");
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    // Window should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(w1->parent()->layout_manager());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    // Resize the window left by a bit and test that the dock expands.
    int previous_width = w1->bounds().width();
    const int kResizeSpan1 = 30;
    ASSERT_NO_FATAL_FAILURE(ResizeStartAtOffsetFromWindowOrigin(
        w1.get(), 0, 20, HTLEFT));
    DragMove(-kResizeSpan1, 0);
    // Normally alignment would be reset to "NONE" during the drag when there is
    // only a single window docked and it is being dragged. However because that
    // window is being resized rather than moved the alignment is not changed.
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // Release the mouse and the window should be attached to the edge.
    DragEnd();
    // The window should stay docked.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // w1 is now wider and the dock should expand to be as wide as w1.
    EXPECT_EQ(previous_width + kResizeSpan1, w1->bounds().width());
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    // Resize the window by dragging its right edge left a bit and test that the
    // window stays docked.
    previous_width = w1->bounds().width();
    const int kResizeSpan2 = 15;
    ASSERT_NO_FATAL_FAILURE(ResizeStartAtOffsetFromWindowOrigin(
        w1.get(), w1->bounds().width(), 20, HTRIGHT));
    DragMove(-kResizeSpan2, 0);
    // Alignment stays "RIGHT" during the drag because the window is being
    // resized rather than dragged.
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // Release the mouse and the window should be attached to the edge.
    DragEnd();
    // The window should stay docked.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    // The dock should stay as wide as w1 is now (a bit less than before).
    EXPECT_EQ(previous_width - kResizeSpan2, w1->bounds().width());
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  }
  
  // Dock two windows, resize one. Test the docked windows area size.
  TEST_P(DockedWindowResizerTest, ResizeTwoWindows) {
    if (!SupportsHostWindowResize())
      return;
  
    // Wider display to start since panels are limited to half the display width.
    UpdateDisplay("1000x600");
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    scoped_ptr<aura::Window> w2(CreateTestWindow(gfx::Rect(0, 0, 210, 201)));
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w2.get(), 100);
    // Both windows should now be docked at the right edge.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
    // Dock width should be set to ideal width.
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(w1->parent()->layout_manager());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(ideal_width(), docked_width(manager));
  
    // Resize the first window left by a bit and test that the dock expands.
    int previous_width = w1->bounds().width();
    const int kResizeSpan1 = 30;
    ASSERT_NO_FATAL_FAILURE(ResizeStartAtOffsetFromWindowOrigin(w1.get(),
                                                                0, 20,
                                                                HTLEFT));
    DragMove(-kResizeSpan1, 0);
    DragEnd();
    // w1 is now wider than before.
    EXPECT_EQ(previous_width + kResizeSpan1, w1->bounds().width());
    // Both windows should get resized since they both don't have min/max size.
    EXPECT_EQ(w1->bounds().width(), w2->bounds().width());
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    // Resize the second window left by a bit more and test that the dock expands.
    previous_width = w2->bounds().width();
    ASSERT_NO_FATAL_FAILURE(ResizeStartAtOffsetFromWindowOrigin(w2.get(),
                                                                0, 20,
                                                                HTLEFT));
    DragMove(-kResizeSpan1, 0);
    DragEnd();
    // w2 should get wider since it was resized by a user.
    EXPECT_EQ(previous_width + kResizeSpan1, w2->bounds().width());
    // w1 should stay as wide as w2 since both were flush with the dock edge.
    EXPECT_EQ(w2->bounds().width(), w1->bounds().width());
    EXPECT_EQ(w2->bounds().width(), docked_width(manager));
  
    // Undock w2 and then dock it back.
    DragToVerticalPositionRelativeToEdge(DOCKED_EDGE_RIGHT, w2.get(), -400, 100);
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w2->parent()->id());
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w2.get(), 100);
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w2->parent()->id());
    // w2 should become same width as w1.
    EXPECT_EQ(w1->bounds().width(), w2->bounds().width());
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    // Make w1 even wider.
    ASSERT_NO_FATAL_FAILURE(ResizeStartAtOffsetFromWindowOrigin(w1.get(),
                                                                0, 20,
                                                                HTLEFT));
    DragMove(-kResizeSpan1, 0);
    DragEnd();
    // Making w1 wider should make both windows wider since w2 no longer remembers
    // user width.
    EXPECT_EQ(w1->bounds().width(), w2->bounds().width());
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  }
  
  // Tests that dragging a window down to shelf attaches a panel but does not
  // attach a regular window.
  TEST_P(DockedWindowResizerTest, DragToShelf) {
    if (!SupportsHostWindowResize())
      return;
  
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    // Work area should cover the whole screen.
    EXPECT_EQ(ScreenUtil::GetDisplayBoundsInParent(w1.get()).width(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w1.get()).width());
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    // A window should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(w1->parent()->layout_manager());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
  
    // Detach and drag down to shelf.
    ASSERT_NO_FATAL_FAILURE(DragStart(w1.get()));
    DragMove(-40, 0);
    // Alignment is set to "NONE" when drag starts.
    EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
    // Release the mouse and the window should be no longer attached to the edge.
    DragEnd();
    EXPECT_EQ(DOCKED_ALIGNMENT_NONE, docked_alignment(manager));
  
    // Drag down almost to shelf. A panel will snap, a regular window won't.
    ShelfWidget* shelf = Shelf::ForPrimaryDisplay()->shelf_widget();
    const int shelf_y = shelf->GetWindowBoundsInScreen().y();
    const int kDistanceFromShelf = 10;
    ASSERT_NO_FATAL_FAILURE(DragStart(w1.get()));
    DragMove(0, -kDistanceFromShelf + shelf_y - w1->bounds().bottom());
    DragEnd();
    if (test_panels()) {
      // The panel should be touching the shelf and attached.
      EXPECT_EQ(shelf_y, w1->bounds().bottom());
      EXPECT_TRUE(wm::GetWindowState(w1.get())->panel_attached());
    } else {
      // The window should not be touching the shelf.
      EXPECT_EQ(shelf_y - kDistanceFromShelf, w1->bounds().bottom());
    }
  }
  
  // Tests that docking and undocking a |window| with a transient child properly
  // maintains the parent of that transient child to be the same as the |window|.
  TEST_P(DockedWindowResizerTest, DragWindowWithTransientChild) {
    if (!SupportsHostWindowResize())
      return;
  
    // Create a window with a transient child.
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    scoped_ptr<aura::Window> child(CreateTestWindowInShellWithDelegateAndType(
        NULL, ui::wm::WINDOW_TYPE_NORMAL, 0, gfx::Rect(20, 20, 150, 20)));
    views::corewm::AddTransientChild(window.get(), child.get());
    if (window->parent() != child->parent())
      window->parent()->AddChild(child.get());
    EXPECT_EQ(window.get(), views::corewm::GetTransientParent(child.get()));
  
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, window.get(), 20);
  
    // A window should be docked at the right edge.
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, child->parent()->id());
  
    // Drag the child - it should move freely and stay where it is dragged.
    ASSERT_NO_FATAL_FAILURE(DragStart(child.get()));
    DragMove(500, 20);
    DragEnd();
    EXPECT_EQ(gfx::Point(20 + 500, 20 + 20).ToString(),
              child->GetBoundsInScreen().origin().ToString());
  
    // Undock the window by dragging left.
    ASSERT_NO_FATAL_FAILURE(DragStart(window.get()));
    DragMove(-32, -10);
    DragEnd();
  
    // The window should be undocked and the transient child should be reparented.
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, window->parent()->id());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, child->parent()->id());
    // The child should not have moved.
    EXPECT_EQ(gfx::Point(20 + 500, 20 + 20).ToString(),
              child->GetBoundsInScreen().origin().ToString());
  }
  
  // Tests that reparenting windows during the drag does not affect system modal
  // windows that are transient children of the dragged windows.
  TEST_P(DockedWindowResizerTest, DragWindowWithModalTransientChild) {
    if (!SupportsHostWindowResize())
      return;
  
    // Create a window.
    scoped_ptr<aura::Window> window(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    gfx::Rect bounds(window->bounds());
  
    // Start dragging the window.
    ASSERT_NO_FATAL_FAILURE(DragStart(window.get()));
    gfx::Vector2d move_vector(40, test_panels() ? -60 : 60);
    DragMove(move_vector.x(), move_vector.y());
    EXPECT_EQ(CorrectContainerIdDuringDrag(), window->parent()->id());
  
    // While still dragging create a modal window and make it a transient child of
    // the |window|.
    scoped_ptr<aura::Window> child(CreateModalWindow(gfx::Rect(20, 20, 150, 20)));
    views::corewm::AddTransientChild(window.get(), child.get());
    EXPECT_EQ(window.get(), views::corewm::GetTransientParent(child.get()));
    EXPECT_EQ(internal::kShellWindowId_SystemModalContainer,
              child->parent()->id());
  
    // End the drag, the |window| should have moved (if it is a panel it will
    // no longer be attached to the shelf since we dragged it above).
    DragEnd();
    bounds.Offset(move_vector);
    EXPECT_EQ(bounds.ToString(), window->GetBoundsInScreen().ToString());
  
    // The original |window| should be in the default container (not docked or
    // attached).
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, window->parent()->id());
    // The transient |child| should still be in system modal container.
    EXPECT_EQ(internal::kShellWindowId_SystemModalContainer,
              child->parent()->id());
    // The |child| should not have moved.
    EXPECT_EQ(gfx::Point(20, 20).ToString(),
              child->GetBoundsInScreen().origin().ToString());
    // The |child| should still be a transient child of |window|.
    EXPECT_EQ(window.get(), views::corewm::GetTransientParent(child.get()));
  }
  
  // Tests that side snapping a window undocks it, closes the dock and then snaps.
  TEST_P(DockedWindowResizerTest, SideSnapDocked) {
    if (!SupportsHostWindowResize() || test_panels())
      return;
  
    scoped_ptr<aura::Window> w1(CreateTestWindow(gfx::Rect(0, 0, 201, 201)));
    wm::WindowState* window_state = wm::GetWindowState(w1.get());
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    // A window should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(w1->parent()->layout_manager());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
    EXPECT_TRUE(window_state->IsDocked());
    EXPECT_FALSE(window_state->IsSnapped());
  
    // Side snap at right edge.
    const wm::WMEvent snap_right(wm::WM_EVENT_SNAP_RIGHT);
    window_state->OnWMEvent(&snap_right);
    // The window should be snapped at the right edge and the dock should close.
    gfx::Rect work_area(ScreenUtil::GetDisplayWorkAreaBoundsInParent(w1.get()));
    EXPECT_EQ(0, docked_width(manager));
    EXPECT_EQ(work_area.height(), w1->bounds().height());
    EXPECT_EQ(work_area.right(), w1->bounds().right());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w1->parent()->id());
    EXPECT_FALSE(window_state->IsDocked());
    EXPECT_TRUE(window_state->IsSnapped());
  
    // Dock again.
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, w1.get(), 20);
    // A window should be docked at the right edge.
    EXPECT_EQ(w1->GetRootWindow()->GetBoundsInScreen().right(),
              w1->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, w1->parent()->id());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(w1->bounds().width(), docked_width(manager));
    EXPECT_TRUE(window_state->IsDocked());
    EXPECT_FALSE(window_state->IsSnapped());
  
    // Side snap at left edge.
    const wm::WMEvent snap_left(wm::WM_EVENT_SNAP_LEFT);
    window_state->OnWMEvent(&snap_left);
    // The window should be snapped at the right edge and the dock should close.
    EXPECT_EQ(work_area.ToString(),
              ScreenUtil::GetDisplayWorkAreaBoundsInParent(w1.get()).ToString());
    EXPECT_EQ(0, docked_width(manager));
    EXPECT_EQ(work_area.height(), w1->bounds().height());
    EXPECT_EQ(work_area.x(), w1->bounds().x());
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, w1->parent()->id());
    EXPECT_FALSE(window_state->IsDocked());
    EXPECT_TRUE(window_state->IsSnapped());
  }
  
  // Tests that a window is undocked if the window is maximized via a keyboard
  // accelerator during a drag.
  TEST_P(DockedWindowResizerTest, MaximizedDuringDrag) {
    if (!SupportsHostWindowResize() || test_panels())
      return;
  
    scoped_ptr<aura::Window> window(CreateTestWindow(
        gfx::Rect(0, 0, ideal_width(), 201)));
    wm::WindowState* window_state = wm::GetWindowState(window.get());
  
    // Dock the window to the right edge.
    DragToVerticalPositionAndToEdge(DOCKED_EDGE_RIGHT, window.get(), 20);
    EXPECT_EQ(window->GetRootWindow()->GetBoundsInScreen().right(),
              window->GetBoundsInScreen().right());
    EXPECT_EQ(internal::kShellWindowId_DockedContainer, window->parent()->id());
    DockedWindowLayoutManager* manager =
        static_cast<DockedWindowLayoutManager*>(
            window->parent()->layout_manager());
    EXPECT_EQ(DOCKED_ALIGNMENT_RIGHT, docked_alignment(manager));
    EXPECT_EQ(window->bounds().width(), docked_width(manager));
    EXPECT_TRUE(window_state->IsDocked());
  
    // Maximize the window while in a real drag. In particular,
    // ToplevelWindowEventHandler::ScopedWindowResizer::OnWindowStateTypeChanged()
    // must be called in order for the maximized window's size to be correct.
    delegate()->set_window_component(HTCAPTION);
    aura::test::EventGenerator& generator = GetEventGenerator();
    generator.MoveMouseTo(window->GetBoundsInScreen().origin());
    generator.PressLeftButton();
    generator.MoveMouseBy(10, 10);
    window_state->Maximize();
    generator.ReleaseLeftButton();
  
    // |window| should get undocked.
    EXPECT_EQ(internal::kShellWindowId_DefaultContainer, window->parent()->id());
    EXPECT_EQ(0, docked_width(manager));
    EXPECT_EQ(
        ScreenUtil::GetMaximizedWindowBoundsInParent(window.get()).ToString(),
        window->bounds().ToString());
    EXPECT_TRUE(window_state->IsMaximized());
  }
  
  // Tests run twice - on both panels and normal windows
  INSTANTIATE_TEST_CASE_P(NormalOrPanel,
                          DockedWindowResizerTest,
                          testing::Values(ui::wm::WINDOW_TYPE_NORMAL,
                                          ui::wm::WINDOW_TYPE_PANEL));
  }  // namespace internal
  }  // namespace ash
  