label_unittest.cc

// Copyright (c) 2012 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 "ui/views/controls/label.h"

#include "base/i18n/rtl.h"
#include "base/strings/utf_string_conversions.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/accessibility/ax_view_state.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/compositor/canvas_painter.h"
#include "ui/gfx/canvas.h"
#include "ui/views/border.h"
#include "ui/views/test/focus_manager_test.h"
#include "ui/views/test/views_test_base.h"
#include "ui/views/widget/widget.h"

using base::ASCIIToUTF16;

namespace views {

typedef ViewsTestBase LabelTest;

class LabelFocusTest : public FocusManagerTest {
 public:
  LabelFocusTest() {}
  ~LabelFocusTest() override {}

 protected:
  views::Label* label() { return label_; }

 private:
  // FocusManagerTest:
  void InitContentView() override {
    label_ = new views::Label();
    GetContentsView()->AddChildView(label_);
  }

  views::Label* label_;
};

// All text sizing measurements (width and height) should be greater than this.
const int kMinTextDimension = 4;

// A test utility function to set the application default text direction.
void SetRTL(bool rtl) {
  // Override the current locale/direction.
  base::i18n::SetICUDefaultLocale(rtl ? "he" : "en");
  EXPECT_EQ(rtl, base::i18n::IsRTL());
}

TEST_F(LabelTest, FontPropertySymbol) {
  Label label;
  std::string font_name("symbol");
  gfx::Font font(font_name, 26);
  label.SetFontList(gfx::FontList(font));
  gfx::Font font_used = label.font_list().GetPrimaryFont();
  EXPECT_EQ(font_name, font_used.GetFontName());
  EXPECT_EQ(26, font_used.GetFontSize());
}

TEST_F(LabelTest, FontPropertyArial) {
  Label label;
  std::string font_name("arial");
  gfx::Font font(font_name, 30);
  label.SetFontList(gfx::FontList(font));
  gfx::Font font_used = label.font_list().GetPrimaryFont();
  EXPECT_EQ(font_name, font_used.GetFontName());
  EXPECT_EQ(30, font_used.GetFontSize());
}

TEST_F(LabelTest, TextProperty) {
  Label label;
  base::string16 test_text(ASCIIToUTF16("A random string."));
  label.SetText(test_text);
  EXPECT_EQ(test_text, label.text());
}

TEST_F(LabelTest, ColorProperty) {
  Label label;
  SkColor color = SkColorSetARGB(20, 40, 10, 5);
  label.SetAutoColorReadabilityEnabled(false);
  label.SetEnabledColor(color);
  EXPECT_EQ(color, label.enabled_color());
}

TEST_F(LabelTest, AlignmentProperty) {
  const bool was_rtl = base::i18n::IsRTL();

  Label label;
  for (size_t i = 0; i < 2; ++i) {
    // Toggle the application default text direction (to try each direction).
    SetRTL(!base::i18n::IsRTL());
    bool reverse_alignment = base::i18n::IsRTL();

    // The alignment should be flipped in RTL UI.
    label.SetHorizontalAlignment(gfx::ALIGN_RIGHT);
    EXPECT_EQ(reverse_alignment ? gfx::ALIGN_LEFT : gfx::ALIGN_RIGHT,
              label.horizontal_alignment());
    label.SetHorizontalAlignment(gfx::ALIGN_LEFT);
    EXPECT_EQ(reverse_alignment ? gfx::ALIGN_RIGHT : gfx::ALIGN_LEFT,
              label.horizontal_alignment());
    label.SetHorizontalAlignment(gfx::ALIGN_CENTER);
    EXPECT_EQ(gfx::ALIGN_CENTER, label.horizontal_alignment());

    for (size_t j = 0; j < 2; ++j) {
      label.SetHorizontalAlignment(gfx::ALIGN_TO_HEAD);
      const bool rtl = j == 0;
      label.SetText(rtl ? base::WideToUTF16(L"\x5d0") : ASCIIToUTF16("A"));
      EXPECT_EQ(gfx::ALIGN_TO_HEAD, label.horizontal_alignment());
    }
  }

  EXPECT_EQ(was_rtl, base::i18n::IsRTL());
}

TEST_F(LabelTest, ElideBehavior) {
  Label label;
  base::string16 text(ASCIIToUTF16("This is example text."));
  label.SetText(text);
  EXPECT_EQ(gfx::ELIDE_TAIL, label.elide_behavior());
  gfx::Size size = label.GetPreferredSize();
  label.SetBoundsRect(gfx::Rect(size));
  EXPECT_EQ(text, label.GetDisplayTextForTesting());

  size.set_width(size.width() / 2);
  label.SetBoundsRect(gfx::Rect(size));
  EXPECT_GT(text.size(), label.GetDisplayTextForTesting().size());

  label.SetElideBehavior(gfx::NO_ELIDE);
  EXPECT_EQ(text, label.GetDisplayTextForTesting());
}

TEST_F(LabelTest, MultiLineProperty) {
  Label label;
  EXPECT_FALSE(label.multi_line());
  label.SetMultiLine(true);
  EXPECT_TRUE(label.multi_line());
  label.SetMultiLine(false);
  EXPECT_FALSE(label.multi_line());
}

TEST_F(LabelTest, ObscuredProperty) {
  Label label;
  base::string16 test_text(ASCIIToUTF16("Password!"));
  label.SetText(test_text);
  label.SizeToPreferredSize();

  // The text should be unobscured by default.
  EXPECT_FALSE(label.obscured());
  EXPECT_EQ(test_text, label.GetDisplayTextForTesting());
  EXPECT_EQ(test_text, label.text());

  label.SetObscured(true);
  label.SizeToPreferredSize();
  EXPECT_TRUE(label.obscured());
  EXPECT_EQ(ASCIIToUTF16("*********"), label.GetDisplayTextForTesting());
  EXPECT_EQ(test_text, label.text());

  label.SetText(test_text + test_text);
  label.SizeToPreferredSize();
  EXPECT_EQ(ASCIIToUTF16("******************"),
            label.GetDisplayTextForTesting());
  EXPECT_EQ(test_text + test_text, label.text());

  label.SetObscured(false);
  label.SizeToPreferredSize();
  EXPECT_FALSE(label.obscured());
  EXPECT_EQ(test_text + test_text, label.GetDisplayTextForTesting());
  EXPECT_EQ(test_text + test_text, label.text());
}

TEST_F(LabelTest, ObscuredSurrogatePair) {
  // 'MUSICAL SYMBOL G CLEF': represented in UTF-16 as two characters
  // forming the surrogate pair 0x0001D11E.
  Label label;
  base::string16 test_text = base::UTF8ToUTF16("\xF0\x9D\x84\x9E");
  label.SetText(test_text);
  label.SetObscured(true);
  label.SizeToPreferredSize();
  EXPECT_EQ(ASCIIToUTF16("*"), label.GetDisplayTextForTesting());
  EXPECT_EQ(test_text, label.text());
}

// This test case verifies the label preferred size will change based on the
// current layout, which may seem wrong. However many of our code base assumes
// this behavior, therefore this behavior will have to be kept until the code
// with this assumption is fixed. See http://crbug.com/468494 and
// http://crbug.com/467526.
// TODO(mukai): fix the code assuming this behavior and then fix Label
// implementation, and remove this test case.
TEST_F(LabelTest, MultilinePreferredSizeTest) {
  Label label;
  label.SetText(ASCIIToUTF16("This is an example."));

  gfx::Size single_line_size = label.GetPreferredSize();

  label.SetMultiLine(true);
  gfx::Size multi_line_size = label.GetPreferredSize();
  EXPECT_EQ(single_line_size, multi_line_size);

  int new_width = multi_line_size.width() / 2;
  label.SetBounds(0, 0, new_width, label.GetHeightForWidth(new_width));
  gfx::Size new_size = label.GetPreferredSize();
  EXPECT_GT(multi_line_size.width(), new_size.width());
  EXPECT_LT(multi_line_size.height(), new_size.height());
}

TEST_F(LabelTest, TooltipProperty) {
  Label label;
  label.SetText(ASCIIToUTF16("My cool string."));

  // Initially, label has no bounds, its text does not fit, and therefore its
  // text should be returned as the tooltip text.
  base::string16 tooltip;
  EXPECT_TRUE(label.GetTooltipText(gfx::Point(), &tooltip));
  EXPECT_EQ(label.text(), tooltip);

  // While tooltip handling is disabled, GetTooltipText() should fail.
  label.SetHandlesTooltips(false);
  EXPECT_FALSE(label.GetTooltipText(gfx::Point(), &tooltip));
  label.SetHandlesTooltips(true);

  // When set, custom tooltip text should be returned instead of the label's
  // text.
  base::string16 tooltip_text(ASCIIToUTF16("The tooltip!"));
  label.SetTooltipText(tooltip_text);
  EXPECT_TRUE(label.GetTooltipText(gfx::Point(), &tooltip));
  EXPECT_EQ(tooltip_text, tooltip);

  // While tooltip handling is disabled, GetTooltipText() should fail.
  label.SetHandlesTooltips(false);
  EXPECT_FALSE(label.GetTooltipText(gfx::Point(), &tooltip));
  label.SetHandlesTooltips(true);

  // When the tooltip text is set to an empty string, the original behavior is
  // restored.
  label.SetTooltipText(base::string16());
  EXPECT_TRUE(label.GetTooltipText(gfx::Point(), &tooltip));
  EXPECT_EQ(label.text(), tooltip);

  // While tooltip handling is disabled, GetTooltipText() should fail.
  label.SetHandlesTooltips(false);
  EXPECT_FALSE(label.GetTooltipText(gfx::Point(), &tooltip));
  label.SetHandlesTooltips(true);

  // Make the label big enough to hold the text
  // and expect there to be no tooltip.
  label.SetBounds(0, 0, 1000, 40);
  EXPECT_FALSE(label.GetTooltipText(gfx::Point(), &tooltip));

  // Shrinking the single-line label's height shouldn't trigger a tooltip.
  label.SetBounds(0, 0, 1000, label.GetPreferredSize().height() / 2);
  EXPECT_FALSE(label.GetTooltipText(gfx::Point(), &tooltip));

  // Verify that explicitly set tooltip text is shown, regardless of size.
  label.SetTooltipText(tooltip_text);
  EXPECT_TRUE(label.GetTooltipText(gfx::Point(), &tooltip));
  EXPECT_EQ(tooltip_text, tooltip);
  // Clear out the explicitly set tooltip text.
  label.SetTooltipText(base::string16());

  // Shrink the bounds and the tooltip should come back.
  label.SetBounds(0, 0, 10, 10);
  EXPECT_TRUE(label.GetTooltipText(gfx::Point(), &tooltip));

  // Make the label obscured and there is no tooltip.
  label.SetObscured(true);
  EXPECT_FALSE(label.GetTooltipText(gfx::Point(), &tooltip));

  // Obscuring the text shouldn't permanently clobber the tooltip.
  label.SetObscured(false);
  EXPECT_TRUE(label.GetTooltipText(gfx::Point(), &tooltip));

  // Making the label multiline shouldn't eliminate the tooltip.
  label.SetMultiLine(true);
  EXPECT_TRUE(label.GetTooltipText(gfx::Point(), &tooltip));
  // Expanding the multiline label bounds should eliminate the tooltip.
  label.SetBounds(0, 0, 1000, 1000);
  EXPECT_FALSE(label.GetTooltipText(gfx::Point(), &tooltip));

  // Verify that setting the tooltip still shows it.
  label.SetTooltipText(tooltip_text);
  EXPECT_TRUE(label.GetTooltipText(gfx::Point(), &tooltip));
  EXPECT_EQ(tooltip_text, tooltip);
  // Clear out the tooltip.
  label.SetTooltipText(base::string16());
}

TEST_F(LabelTest, Accessibility) {
  Label label;
  label.SetText(ASCIIToUTF16("My special text."));

  ui::AXViewState state;
  label.GetAccessibleState(&state);
  EXPECT_EQ(ui::AX_ROLE_STATIC_TEXT, state.role);
  EXPECT_EQ(label.text(), state.name);
  EXPECT_TRUE(state.HasStateFlag(ui::AX_STATE_READ_ONLY));
}

TEST_F(LabelTest, TextChangeWithoutLayout) {
  Label label;
  label.SetText(ASCIIToUTF16("Example"));
  label.SetBounds(0, 0, 200, 200);

  gfx::Canvas canvas(gfx::Size(200, 200), 1.0f, true);
  label.Paint(ui::CanvasPainter(&canvas, 1.f).context());
  EXPECT_EQ(1u, label.lines_.size());
  EXPECT_EQ(ASCIIToUTF16("Example"), label.lines_[0]->GetDisplayText());

  label.SetText(ASCIIToUTF16("Altered"));
  // The altered text should be painted even though Layout() or SetBounds() are
  // not called.
  label.Paint(ui::CanvasPainter(&canvas, 1.f).context());
  EXPECT_EQ(1u, label.lines_.size());
  EXPECT_EQ(ASCIIToUTF16("Altered"), label.lines_[0]->GetDisplayText());
}

TEST_F(LabelTest, EmptyLabelSizing) {
  Label label;
  const gfx::Size expected_size(0, gfx::FontList().GetHeight());
  EXPECT_EQ(expected_size, label.GetPreferredSize());
  label.SetMultiLine(!label.multi_line());
  EXPECT_EQ(expected_size, label.GetPreferredSize());
}

TEST_F(LabelTest, SingleLineSizing) {
  Label label;
  label.SetText(ASCIIToUTF16("A not so random string in one line."));
  const gfx::Size size = label.GetPreferredSize();
  EXPECT_GT(size.height(), kMinTextDimension);
  EXPECT_GT(size.width(), kMinTextDimension);

  // Setting a size smaller than preferred should not change the preferred size.
  label.SetSize(gfx::Size(size.width() / 2, size.height() / 2));
  EXPECT_EQ(size, label.GetPreferredSize());

  const gfx::Insets border(10, 20, 30, 40);
  label.SetBorder(Border::CreateEmptyBorder(
      border.top(), border.left(), border.bottom(), border.right()));
  const gfx::Size size_with_border = label.GetPreferredSize();
  EXPECT_EQ(size_with_border.height(), size.height() + border.height());
  EXPECT_EQ(size_with_border.width(), size.width() + border.width());
  EXPECT_EQ(size.height() + border.height(),
            label.GetHeightForWidth(size_with_border.width()));
}

TEST_F(LabelTest, MultilineSmallAvailableWidthSizing) {
  Label label;
  label.SetMultiLine(true);
  label.SetAllowCharacterBreak(true);
  label.SetText(ASCIIToUTF16("Too Wide."));

  // Check that Label can be laid out at a variety of small sizes,
  // splitting the words into up to one character per line if necessary.
  // Incorrect word splitting may cause infinite loops in text layout.
  gfx::Size required_size = label.GetPreferredSize();
  for (int i = 1; i < required_size.width(); ++i)
    EXPECT_GT(label.GetHeightForWidth(i), 0);
}

// Verifies if SetAllowCharacterBreak(true) doesn't change the preferred size.
// See crbug.com/469559
TEST_F(LabelTest, PreferredSizeForAllowCharacterBreak) {
  Label label(base::ASCIIToUTF16("Example"));
  gfx::Size preferred_size = label.GetPreferredSize();

  label.SetMultiLine(true);
  label.SetAllowCharacterBreak(true);
  EXPECT_EQ(preferred_size, label.GetPreferredSize());
}

TEST_F(LabelTest, MultiLineSizing) {
  Label label;
  label.SetFocusable(false);
  label.SetText(
      ASCIIToUTF16("A random string\nwith multiple lines\nand returns!"));
  label.SetMultiLine(true);

  // GetPreferredSize
  gfx::Size required_size = label.GetPreferredSize();
  EXPECT_GT(required_size.height(), kMinTextDimension);
  EXPECT_GT(required_size.width(), kMinTextDimension);

  // SizeToFit with unlimited width.
  label.SizeToFit(0);
  int required_width = label.GetLocalBounds().width();
  EXPECT_GT(required_width, kMinTextDimension);

  // SizeToFit with limited width.
  label.SizeToFit(required_width - 1);
  int constrained_width = label.GetLocalBounds().width();
#if defined(OS_WIN)
  // Canvas::SizeStringInt (in ui/gfx/canvas_linux.cc)
  // has to be fixed to return the size that fits to given width/height.
  EXPECT_LT(constrained_width, required_width);
#endif
  EXPECT_GT(constrained_width, kMinTextDimension);

  // Change the width back to the desire width.
  label.SizeToFit(required_width);
  EXPECT_EQ(required_width, label.GetLocalBounds().width());

  // General tests for GetHeightForWidth.
  int required_height = label.GetHeightForWidth(required_width);
  EXPECT_GT(required_height, kMinTextDimension);
  int height_for_constrained_width = label.GetHeightForWidth(constrained_width);
#if defined(OS_WIN)
  // Canvas::SizeStringInt (in ui/gfx/canvas_linux.cc)
  // has to be fixed to return the size that fits to given width/height.
  EXPECT_GT(height_for_constrained_width, required_height);
#endif
  // Using the constrained width or the required_width - 1 should give the
  // same result for the height because the constrainted width is the tight
  // width when given "required_width - 1" as the max width.
  EXPECT_EQ(height_for_constrained_width,
            label.GetHeightForWidth(required_width - 1));

  // Test everything with borders.
  gfx::Insets border(10, 20, 30, 40);
  label.SetBorder(Border::CreateEmptyBorder(
      border.top(), border.left(), border.bottom(), border.right()));

  // SizeToFit and borders.
  label.SizeToFit(0);
  int required_width_with_border = label.GetLocalBounds().width();
  EXPECT_EQ(required_width_with_border, required_width + border.width());

  // GetHeightForWidth and borders.
  int required_height_with_border =
      label.GetHeightForWidth(required_width_with_border);
  EXPECT_EQ(required_height_with_border, required_height + border.height());

  // Test that the border width is subtracted before doing the height
  // calculation.  If it is, then the height will grow when width
  // is shrunk.
  int height1 = label.GetHeightForWidth(required_width_with_border - 1);
#if defined(OS_WIN)
  // Canvas::SizeStringInt (in ui/gfx/canvas_linux.cc)
  // has to be fixed to return the size that fits to given width/height.
  EXPECT_GT(height1, required_height_with_border);
#endif
  EXPECT_EQ(height1, height_for_constrained_width + border.height());

  // GetPreferredSize and borders.
  label.SetBounds(0, 0, 0, 0);
  gfx::Size required_size_with_border = label.GetPreferredSize();
  EXPECT_EQ(required_size_with_border.height(),
            required_size.height() + border.height());
  EXPECT_EQ(required_size_with_border.width(),
            required_size.width() + border.width());
}

// Verifies if the combination of text eliding and multiline doesn't cause
// any side effects of size / layout calculation.
TEST_F(LabelTest, MultiLineSizingWithElide) {
  const base::string16 text =
      ASCIIToUTF16("A random string\nwith multiple lines\nand returns!");
  Label label;
  label.SetFocusable(false);
  label.SetText(text);
  label.SetMultiLine(true);

  gfx::Size required_size = label.GetPreferredSize();
  EXPECT_GT(required_size.height(), kMinTextDimension);
  EXPECT_GT(required_size.width(), kMinTextDimension);
  label.SetBoundsRect(gfx::Rect(required_size));

  label.SetElideBehavior(gfx::ELIDE_TAIL);
  EXPECT_EQ(required_size.ToString(), label.GetPreferredSize().ToString());
  EXPECT_EQ(text, label.GetDisplayTextForTesting());

  label.SizeToFit(required_size.width() - 1);
  gfx::Size narrow_size = label.GetPreferredSize();
  EXPECT_GT(required_size.width(), narrow_size.width());
  EXPECT_LT(required_size.height(), narrow_size.height());

  // SetBounds() doesn't change the preferred size.
  label.SetBounds(0, 0, narrow_size.width() - 1, narrow_size.height());
  EXPECT_EQ(narrow_size.ToString(), label.GetPreferredSize().ToString());

  // Paint() doesn't change the preferred size.
  gfx::Canvas canvas;
  label.Paint(ui::CanvasPainter(&canvas, 1.f).context());
  EXPECT_EQ(narrow_size.ToString(), label.GetPreferredSize().ToString());
}

// Check that labels support GetTooltipHandlerForPoint.
TEST_F(LabelTest, GetTooltipHandlerForPoint) {
  // A root view must be defined for this test because the hit-testing
  // behaviour used by GetTooltipHandlerForPoint() is defined by
  // the ViewTargeter installed on the root view.
  Widget widget;
  Widget::InitParams init_params =
      CreateParams(Widget::InitParams::TYPE_POPUP);
  init_params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
  init_params.bounds = gfx::Rect(0, 0, 200, 200);
  widget.Init(init_params);

  Label label;
  label.SetText(
      ASCIIToUTF16("A string that's long enough to exceed the bounds"));
  label.SetBounds(0, 0, 10, 10);
  widget.SetContentsView(&label);

  // By default, labels start out as tooltip handlers.
  ASSERT_TRUE(label.handles_tooltips());

  // There's a default tooltip if the text is too big to fit.
  EXPECT_EQ(&label, label.GetTooltipHandlerForPoint(gfx::Point(2, 2)));

  // If tooltip handling is disabled, the label should not provide a tooltip
  // handler.
  label.SetHandlesTooltips(false);
  EXPECT_FALSE(label.GetTooltipHandlerForPoint(gfx::Point(2, 2)));
  label.SetHandlesTooltips(true);

  // If there's no default tooltip, this should return NULL.
  label.SetBounds(0, 0, 500, 50);
  EXPECT_FALSE(label.GetTooltipHandlerForPoint(gfx::Point(2, 2)));

  label.SetTooltipText(ASCIIToUTF16("a tooltip"));
  // If the point hits the label, and tooltip is set, the label should be
  // returned as its tooltip handler.
  EXPECT_EQ(&label, label.GetTooltipHandlerForPoint(gfx::Point(2, 2)));

  // Additionally, GetTooltipHandlerForPoint should verify that the label
  // actually contains the point.
  EXPECT_FALSE(label.GetTooltipHandlerForPoint(gfx::Point(2, 51)));
  EXPECT_FALSE(label.GetTooltipHandlerForPoint(gfx::Point(-1, 20)));

  // Again, if tooltip handling is disabled, the label should not provide a
  // tooltip handler.
  label.SetHandlesTooltips(false);
  EXPECT_FALSE(label.GetTooltipHandlerForPoint(gfx::Point(2, 2)));
  EXPECT_FALSE(label.GetTooltipHandlerForPoint(gfx::Point(2, 51)));
  EXPECT_FALSE(label.GetTooltipHandlerForPoint(gfx::Point(-1, 20)));
  label.SetHandlesTooltips(true);

  // GetTooltipHandlerForPoint works should work in child bounds.
  label.SetBounds(2, 2, 10, 10);
  EXPECT_EQ(&label, label.GetTooltipHandlerForPoint(gfx::Point(1, 5)));
  EXPECT_FALSE(label.GetTooltipHandlerForPoint(gfx::Point(3, 11)));
}

// Check that label releases its internal layout data when it's unnecessary.
TEST_F(LabelTest, ResetRenderTextData) {
  Label label;
  label.SetText(ASCIIToUTF16("Example"));
  label.SizeToPreferredSize();
  gfx::Size preferred_size = label.GetPreferredSize();

  EXPECT_NE(gfx::Size().ToString(), preferred_size.ToString());
  EXPECT_EQ(0u, label.lines_.size());

  gfx::Canvas canvas(preferred_size, 1.0f, true);
  label.Paint(ui::CanvasPainter(&canvas, 1.f).context());
  EXPECT_EQ(1u, label.lines_.size());

  // Label should recreate its RenderText object when it's invisible, to release
  // the layout structures and data.
  label.SetVisible(false);
  EXPECT_EQ(0u, label.lines_.size());

  // Querying fields or size information should not recompute the layout
  // unnecessarily.
  EXPECT_EQ(ASCIIToUTF16("Example"), label.text());
  EXPECT_EQ(0u, label.lines_.size());

  EXPECT_EQ(preferred_size.ToString(), label.GetPreferredSize().ToString());
  EXPECT_EQ(0u, label.lines_.size());

  // RenderText data should be back when it's necessary.
  label.SetVisible(true);
  EXPECT_EQ(0u, label.lines_.size());

  label.Paint(ui::CanvasPainter(&canvas, 1.f).context());
  EXPECT_EQ(1u, label.lines_.size());

  // Changing layout just resets |lines_|. It'll recover next time it's drawn.
  label.SetBounds(0, 0, 10, 10);
  EXPECT_EQ(0u, label.lines_.size());

  label.Paint(ui::CanvasPainter(&canvas, 1.f).context());
  EXPECT_EQ(1u, label.lines_.size());
}

#if !defined(OS_MACOSX)
TEST_F(LabelTest, MultilineSupportedRenderText) {
  scoped_ptr<gfx::RenderText> render_text(gfx::RenderText::CreateInstance());
  ASSERT_TRUE(render_text->MultilineSupported());

  Label label;
  label.SetText(ASCIIToUTF16("Example of\nmultilined label"));
  label.SetMultiLine(true);
  label.SizeToPreferredSize();

  gfx::Canvas canvas(label.GetPreferredSize(), 1.0f, true);
  label.Paint(ui::CanvasPainter(&canvas, 1.f).context());

  // There's only one 'line', RenderText itself supports multiple lines.
  EXPECT_EQ(1u, label.lines_.size());
}
#endif

TEST_F(LabelFocusTest, FocusBounds) {
  label()->SetText(ASCIIToUTF16("Example"));
  gfx::Size normal_size = label()->GetPreferredSize();

  label()->SetFocusable(true);
  label()->RequestFocus();
  gfx::Size focusable_size = label()->GetPreferredSize();
  // Focusable label requires larger size to paint the focus rectangle.
  EXPECT_GT(focusable_size.width(), normal_size.width());
  EXPECT_GT(focusable_size.height(), normal_size.height());

  label()->SizeToPreferredSize();
  gfx::Rect focus_bounds = label()->GetFocusBounds();
  EXPECT_EQ(label()->GetLocalBounds().ToString(), focus_bounds.ToString());

  label()->SetBounds(
      0, 0, focusable_size.width() * 2, focusable_size.height() * 2);
  label()->SetHorizontalAlignment(gfx::ALIGN_LEFT);
  focus_bounds = label()->GetFocusBounds();
  EXPECT_EQ(0, focus_bounds.x());
  EXPECT_LT(0, focus_bounds.y());
  EXPECT_GT(label()->bounds().bottom(), focus_bounds.bottom());
  EXPECT_EQ(focusable_size.ToString(), focus_bounds.size().ToString());

  label()->SetHorizontalAlignment(gfx::ALIGN_RIGHT);
  focus_bounds = label()->GetFocusBounds();
  EXPECT_LT(0, focus_bounds.x());
  EXPECT_EQ(label()->bounds().right(), focus_bounds.right());
  EXPECT_LT(0, focus_bounds.y());
  EXPECT_GT(label()->bounds().bottom(), focus_bounds.bottom());
  EXPECT_EQ(focusable_size.ToString(), focus_bounds.size().ToString());

  label()->SetHorizontalAlignment(gfx::ALIGN_LEFT);
  label()->SetElideBehavior(gfx::FADE_TAIL);
  label()->SetBounds(0, 0, focusable_size.width() / 2, focusable_size.height());
  focus_bounds = label()->GetFocusBounds();
  EXPECT_EQ(0, focus_bounds.x());
  EXPECT_EQ(focusable_size.width() / 2, focus_bounds.width());
}

TEST_F(LabelFocusTest, EmptyLabel) {
  label()->SetFocusable(true);
  label()->RequestFocus();
  label()->SizeToPreferredSize();

  gfx::Rect focus_bounds = label()->GetFocusBounds();
  EXPECT_FALSE(focus_bounds.IsEmpty());
  EXPECT_LT(label()->font_list().GetHeight(), focus_bounds.height());
}

}  // namespace views