ui/views/controls/scrollbar/scrollbar_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 "ui/views/controls/scrollbar/native_scroll_bar.h"
   6 #include "ui/views/controls/scrollbar/native_scroll_bar_views.h"
   7 #include "ui/views/controls/scrollbar/scroll_bar.h"
   8 #include "ui/views/test/views_test_base.h"
   9 #include "ui/views/widget/widget.h"
  10
  11 namespace {
  12
  13 // The Scrollbar controller. This is the widget that should do the real
  14 // scrolling of contents.
  15 class TestScrollBarController : public views::ScrollBarController {
  16  public:
  17   virtual ~TestScrollBarController() {}
  18
  19   virtual void ScrollToPosition(views::ScrollBar* source,
  20                                 int position) OVERRIDE {
  21     last_source = source;
  22     last_position = position;
  23   }
  24
  25   virtual int GetScrollIncrement(views::ScrollBar* source,
  26                                  bool is_page,
  27                                  bool is_positive) OVERRIDE {
  28     last_source = source;
  29     last_is_page = is_page;
  30     last_is_positive = is_positive;
  31
  32     if (is_page)
  33       return 20;
  34     return 10;
  35   }
  36
  37   // We save the last values in order to assert the corectness of the scroll
  38   // operation.
  39   views::ScrollBar* last_source;
  40   bool last_is_positive;
  41   bool last_is_page;
  42   int last_position;
  43 };
  44
  45 }  // namespace
  46
  47 namespace views {
  48
  49 class NativeScrollBarTest : public ViewsTestBase {
  50  public:
  51   NativeScrollBarTest() : widget_(NULL), scrollbar_(NULL) {}
  52
  53   virtual void SetUp() {
  54     ViewsTestBase::SetUp();
  55     controller_.reset(new TestScrollBarController());
  56
  57     ASSERT_FALSE(scrollbar_);
  58     native_scrollbar_ = new NativeScrollBar(true);
  59     native_scrollbar_->SetBounds(0, 0, 100, 100);
  60     native_scrollbar_->set_controller(controller_.get());
  61
  62     widget_ = new Widget;
  63     Widget::InitParams params = CreateParams(Widget::InitParams::TYPE_POPUP);
  64     params.bounds = gfx::Rect(0, 0, 100, 100);
  65     widget_->Init(params);
  66     View* container = new View();
  67     widget_->SetContentsView(container);
  68     container->AddChildView(native_scrollbar_);
  69
  70     scrollbar_ =
  71         static_cast<NativeScrollBarViews*>(native_scrollbar_->native_wrapper_);
  72     scrollbar_->SetBounds(0, 0, 100, 100);
  73     scrollbar_->Update(100, 200, 0);
  74
  75     track_size_ = scrollbar_->GetTrackBounds().width();
  76   }
  77
  78   virtual void TearDown() {
  79     widget_->Close();
  80     ViewsTestBase::TearDown();
  81   }
  82
  83  protected:
  84   Widget* widget_;
  85
  86   // This is the native scrollbar the Views one wraps around.
  87   NativeScrollBar* native_scrollbar_;
  88
  89   // This is the Views scrollbar.
  90   BaseScrollBar* scrollbar_;
  91
  92   // Keep track of the size of the track. This is how we can tell when we
  93   // scroll to the middle.
  94   int track_size_;
  95
  96   scoped_ptr<TestScrollBarController> controller_;
  97 };
  98
  99 // TODO(dnicoara) Can't run the test on Windows since the scrollbar |Part|
 100 // isn't handled in NativeTheme.
 101 #if defined(OS_WIN)
 102 #define MAYBE_Scrolling DISABLED_Scrolling
 103 #define MAYBE_ScrollBarFitsToBottom DISABLED_ScrollBarFitsToBottom
 104 #else
 105 #define MAYBE_Scrolling Scrolling
 106 #define MAYBE_ScrollBarFitsToBottom ScrollBarFitsToBottom
 107 #endif
 108
 109 TEST_F(NativeScrollBarTest, MAYBE_Scrolling) {
 110   EXPECT_EQ(scrollbar_->GetPosition(), 0);
 111   EXPECT_EQ(scrollbar_->GetMaxPosition(), 100);
 112   EXPECT_EQ(scrollbar_->GetMinPosition(), 0);
 113
 114   // Scroll to middle.
 115   scrollbar_->ScrollToThumbPosition(track_size_ / 4, false);
 116   EXPECT_EQ(controller_->last_position, 50);
 117   EXPECT_EQ(controller_->last_source, native_scrollbar_);
 118
 119   // Scroll to the end.
 120   scrollbar_->ScrollToThumbPosition(track_size_ / 2, false);
 121   EXPECT_EQ(controller_->last_position, 100);
 122
 123   // Overscroll. Last position should be the maximum position.
 124   scrollbar_->ScrollToThumbPosition(track_size_, false);
 125   EXPECT_EQ(controller_->last_position, 100);
 126
 127   // Underscroll. Last position should be the minimum position.
 128   scrollbar_->ScrollToThumbPosition(-10, false);
 129   EXPECT_EQ(controller_->last_position, 0);
 130
 131   // Test the different fixed scrolling amounts. Generally used by buttons,
 132   // or click on track.
 133   scrollbar_->ScrollToThumbPosition(0, false);
 134   scrollbar_->ScrollByAmount(BaseScrollBar::SCROLL_NEXT_LINE);
 135   EXPECT_EQ(controller_->last_position, 10);
 136
 137   scrollbar_->ScrollByAmount(BaseScrollBar::SCROLL_PREV_LINE);
 138   EXPECT_EQ(controller_->last_position, 0);
 139
 140   scrollbar_->ScrollByAmount(BaseScrollBar::SCROLL_NEXT_PAGE);
 141   EXPECT_EQ(controller_->last_position, 20);
 142
 143   scrollbar_->ScrollByAmount(BaseScrollBar::SCROLL_PREV_PAGE);
 144   EXPECT_EQ(controller_->last_position, 0);
 145 }
 146
 147 TEST_F(NativeScrollBarTest, MAYBE_ScrollBarFitsToBottom) {
 148   scrollbar_->Update(100, 199, 0);
 149   EXPECT_EQ(0, scrollbar_->GetPosition());
 150   EXPECT_EQ(99, scrollbar_->GetMaxPosition());
 151   EXPECT_EQ(0, scrollbar_->GetMinPosition());
 152
 153   scrollbar_->Update(100, 199, 99);
 154   EXPECT_EQ(
 155       scrollbar_->GetTrackBounds().width() - scrollbar_->GetThumbSizeForTest(),
 156       scrollbar_->GetPosition());
 157 }
 158
 159 TEST_F(NativeScrollBarTest, ScrollToEndAfterShrinkAndExpand) {
 160   // Scroll to the end of the content.
 161   scrollbar_->Update(100, 101, 0);
 162   EXPECT_TRUE(scrollbar_->ScrollByContentsOffset(-1));
 163   // Shrink and then re-exapnd the content.
 164   scrollbar_->Update(100, 100, 0);
 165   scrollbar_->Update(100, 101, 0);
 166   // Ensure the scrollbar allows scrolling to the end.
 167   EXPECT_TRUE(scrollbar_->ScrollByContentsOffset(-1));
 168 }
 169
 170 }  // namespace views