ui/views/controls/button/label_button_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/button/label_button.h"
   6
   7 #include "base/strings/utf_string_conversions.h"
   8 #include "third_party/skia/include/core/SkBitmap.h"
   9 #include "ui/gfx/canvas.h"
  10 #include "ui/gfx/font_list.h"
  11 #include "ui/gfx/geometry/size.h"
  12 #include "ui/gfx/text_utils.h"
  13 #include "ui/views/test/views_test_base.h"
  14
  15 using base::ASCIIToUTF16;
  16
  17 namespace {
  18
  19 gfx::ImageSkia CreateTestImage(int width, int height) {
  20   SkBitmap bitmap;
  21   bitmap.allocN32Pixels(width, height);
  22   return gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
  23 }
  24
  25 }  // namespace
  26
  27 namespace views {
  28
  29 typedef ViewsTestBase LabelButtonTest;
  30
  31 TEST_F(LabelButtonTest, Init) {
  32   const base::string16 text(ASCIIToUTF16("abc"));
  33   LabelButton button(NULL, text);
  34
  35   EXPECT_TRUE(button.GetImage(Button::STATE_NORMAL).isNull());
  36   EXPECT_TRUE(button.GetImage(Button::STATE_HOVERED).isNull());
  37   EXPECT_TRUE(button.GetImage(Button::STATE_PRESSED).isNull());
  38   EXPECT_TRUE(button.GetImage(Button::STATE_DISABLED).isNull());
  39
  40   EXPECT_EQ(text, button.GetText());
  41   EXPECT_EQ(gfx::ALIGN_LEFT, button.GetHorizontalAlignment());
  42   EXPECT_FALSE(button.is_default());
  43   EXPECT_EQ(button.style(), Button::STYLE_TEXTBUTTON);
  44   EXPECT_EQ(Button::STATE_NORMAL, button.state());
  45
  46   EXPECT_EQ(button.image_->parent(), &button);
  47   EXPECT_EQ(button.label_->parent(), &button);
  48 }
  49
  50 TEST_F(LabelButtonTest, Label) {
  51   LabelButton button(NULL, base::string16());
  52   EXPECT_TRUE(button.GetText().empty());
  53
  54   const gfx::FontList font_list;
  55   const base::string16 short_text(ASCIIToUTF16("abcdefghijklm"));
  56   const base::string16 long_text(ASCIIToUTF16("abcdefghijklmnopqrstuvwxyz"));
  57   const int short_text_width = gfx::GetStringWidth(short_text, font_list);
  58   const int long_text_width = gfx::GetStringWidth(long_text, font_list);
  59
  60   // The width increases monotonically with string size (it does not shrink).
  61   EXPECT_LT(button.GetPreferredSize().width(), short_text_width);
  62   button.SetText(short_text);
  63   EXPECT_GT(button.GetPreferredSize().height(), font_list.GetHeight());
  64   EXPECT_GT(button.GetPreferredSize().width(), short_text_width);
  65   EXPECT_LT(button.GetPreferredSize().width(), long_text_width);
  66   button.SetText(long_text);
  67   EXPECT_GT(button.GetPreferredSize().width(), long_text_width);
  68   button.SetText(short_text);
  69   EXPECT_GT(button.GetPreferredSize().width(), long_text_width);
  70
  71   // Clamp the size to a maximum value.
  72   button.SetMaxSize(gfx::Size(long_text_width, 1));
  73   EXPECT_EQ(button.GetPreferredSize(), gfx::Size(long_text_width, 1));
  74
  75   // Clear the monotonically increasing minimum size.
  76   button.SetMinSize(gfx::Size());
  77   EXPECT_GT(button.GetPreferredSize().width(), short_text_width);
  78   EXPECT_LT(button.GetPreferredSize().width(), long_text_width);
  79 }
  80
  81 TEST_F(LabelButtonTest, Image) {
  82   LabelButton button(NULL, base::string16());
  83
  84   const int small_size = 50, large_size = 100;
  85   const gfx::ImageSkia small_image = CreateTestImage(small_size, small_size);
  86   const gfx::ImageSkia large_image = CreateTestImage(large_size, large_size);
  87
  88   // The width increases monotonically with image size (it does not shrink).
  89   EXPECT_LT(button.GetPreferredSize().width(), small_size);
  90   EXPECT_LT(button.GetPreferredSize().height(), small_size);
  91   button.SetImage(Button::STATE_NORMAL, small_image);
  92   EXPECT_GT(button.GetPreferredSize().width(), small_size);
  93   EXPECT_GT(button.GetPreferredSize().height(), small_size);
  94   EXPECT_LT(button.GetPreferredSize().width(), large_size);
  95   EXPECT_LT(button.GetPreferredSize().height(), large_size);
  96   button.SetImage(Button::STATE_NORMAL, large_image);
  97   EXPECT_GT(button.GetPreferredSize().width(), large_size);
  98   EXPECT_GT(button.GetPreferredSize().height(), large_size);
  99   button.SetImage(Button::STATE_NORMAL, small_image);
 100   EXPECT_GT(button.GetPreferredSize().width(), large_size);
 101   EXPECT_GT(button.GetPreferredSize().height(), large_size);
 102
 103   // Clamp the size to a maximum value.
 104   button.SetMaxSize(gfx::Size(large_size, 1));
 105   EXPECT_EQ(button.GetPreferredSize(), gfx::Size(large_size, 1));
 106
 107   // Clear the monotonically increasing minimum size.
 108   button.SetMinSize(gfx::Size());
 109   EXPECT_GT(button.GetPreferredSize().width(), small_size);
 110   EXPECT_LT(button.GetPreferredSize().width(), large_size);
 111 }
 112
 113 TEST_F(LabelButtonTest, LabelAndImage) {
 114   LabelButton button(NULL, base::string16());
 115
 116   const gfx::FontList font_list;
 117   const base::string16 text(ASCIIToUTF16("abcdefghijklm"));
 118   const int text_width = gfx::GetStringWidth(text, font_list);
 119
 120   const int image_size = 50;
 121   const gfx::ImageSkia image = CreateTestImage(image_size, image_size);
 122   ASSERT_LT(font_list.GetHeight(), image_size);
 123
 124   // The width increases monotonically with content size (it does not shrink).
 125   EXPECT_LT(button.GetPreferredSize().width(), text_width);
 126   EXPECT_LT(button.GetPreferredSize().width(), image_size);
 127   EXPECT_LT(button.GetPreferredSize().height(), image_size);
 128   button.SetText(text);
 129   EXPECT_GT(button.GetPreferredSize().width(), text_width);
 130   EXPECT_GT(button.GetPreferredSize().height(), font_list.GetHeight());
 131   EXPECT_LT(button.GetPreferredSize().width(), text_width + image_size);
 132   EXPECT_LT(button.GetPreferredSize().height(), image_size);
 133   button.SetImage(Button::STATE_NORMAL, image);
 134   EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size);
 135   EXPECT_GT(button.GetPreferredSize().height(), image_size);
 136
 137   // Layout and ensure the image is left of the label except for ALIGN_RIGHT.
 138   // (A proper parent view or layout manager would Layout on its invalidations).
 139   button.SetSize(button.GetPreferredSize());
 140   button.Layout();
 141   EXPECT_EQ(gfx::ALIGN_LEFT, button.GetHorizontalAlignment());
 142   EXPECT_LT(button.image_->bounds().right(), button.label_->bounds().x());
 143   button.SetHorizontalAlignment(gfx::ALIGN_CENTER);
 144   button.Layout();
 145   EXPECT_EQ(gfx::ALIGN_CENTER, button.GetHorizontalAlignment());
 146   EXPECT_LT(button.image_->bounds().right(), button.label_->bounds().x());
 147   button.SetHorizontalAlignment(gfx::ALIGN_RIGHT);
 148   button.Layout();
 149   EXPECT_EQ(gfx::ALIGN_RIGHT, button.GetHorizontalAlignment());
 150   EXPECT_LT(button.label_->bounds().right(), button.image_->bounds().x());
 151
 152   button.SetText(base::string16());
 153   EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size);
 154   EXPECT_GT(button.GetPreferredSize().height(), image_size);
 155   button.SetImage(Button::STATE_NORMAL, gfx::ImageSkia());
 156   EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size);
 157   EXPECT_GT(button.GetPreferredSize().height(), image_size);
 158
 159   // Clamp the size to a maximum value.
 160   button.SetMaxSize(gfx::Size(image_size, 1));
 161   EXPECT_EQ(button.GetPreferredSize(), gfx::Size(image_size, 1));
 162
 163   // Clear the monotonically increasing minimum size.
 164   button.SetMinSize(gfx::Size());
 165   EXPECT_LT(button.GetPreferredSize().width(), text_width);
 166   EXPECT_LT(button.GetPreferredSize().width(), image_size);
 167   EXPECT_LT(button.GetPreferredSize().height(), image_size);
 168 }
 169
 170 TEST_F(LabelButtonTest, FontList) {
 171   const base::string16 text(ASCIIToUTF16("abc"));
 172   LabelButton button(NULL, text);
 173
 174   const gfx::FontList original_font_list = button.GetFontList();
 175   const gfx::FontList large_font_list =
 176       original_font_list.DeriveWithSizeDelta(100);
 177   const int original_width = button.GetPreferredSize().width();
 178   const int original_height = button.GetPreferredSize().height();
 179
 180   // The button size increases when the font size is increased.
 181   button.SetFontList(large_font_list);
 182   EXPECT_GT(button.GetPreferredSize().width(), original_width);
 183   EXPECT_GT(button.GetPreferredSize().height(), original_height);
 184
 185   // The button returns to its original size when the minimal size is cleared
 186   // and the original font size is restored.
 187   button.SetMinSize(gfx::Size());
 188   button.SetFontList(original_font_list);
 189   EXPECT_EQ(original_width, button.GetPreferredSize().width());
 190   EXPECT_EQ(original_height, button.GetPreferredSize().height());
 191 }
 192
 193 TEST_F(LabelButtonTest, ChangeTextSize) {
 194   const base::string16 text(ASCIIToUTF16("abc"));
 195   const base::string16 longer_text(ASCIIToUTF16("abcdefghijklm"));
 196   LabelButton button(NULL, text);
 197
 198   const int original_width = button.GetPreferredSize().width();
 199
 200   // The button size increases when the text size is increased.
 201   button.SetText(longer_text);
 202   EXPECT_GT(button.GetPreferredSize().width(), original_width);
 203
 204   // The button returns to its original size when the original text is restored.
 205   button.SetMinSize(gfx::Size());
 206   button.SetText(text);
 207   EXPECT_EQ(original_width, button.GetPreferredSize().width());
 208 }
 209
 210 TEST_F(LabelButtonTest, ChangeLabelImageSpacing) {
 211   LabelButton button(NULL, ASCIIToUTF16("abc"));
 212   button.SetImage(Button::STATE_NORMAL, CreateTestImage(50, 50));
 213
 214   const int kOriginalSpacing = 5;
 215   button.SetImageLabelSpacing(kOriginalSpacing);
 216   const int original_width = button.GetPreferredSize().width();
 217
 218   // Increasing the spacing between the text and label should increase the size.
 219   button.SetImageLabelSpacing(2 * kOriginalSpacing);
 220   EXPECT_GT(button.GetPreferredSize().width(), original_width);
 221
 222   // The button shrinks if the original spacing is restored.
 223   button.SetMinSize(gfx::Size());
 224   button.SetImageLabelSpacing(kOriginalSpacing);
 225   EXPECT_EQ(original_width, button.GetPreferredSize().width());
 226 }
 227
 228 }  // namespace views