ui/gfx/font_list_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/gfx/font_list.h"
   6
   7 #include <algorithm>
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/strings/string_number_conversions.h"
  12 #include "base/strings/string_util.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14
  15 namespace {
  16
  17 // Helper function for comparing fonts for equality.
  18 std::string FontToString(const gfx::Font& font) {
  19   std::string font_string = font.GetFontName();
  20   font_string += "|";
  21   font_string += base::IntToString(font.GetFontSize());
  22   int style = font.GetStyle();
  23   if (style & gfx::Font::BOLD)
  24     font_string += "|bold";
  25   if (style & gfx::Font::ITALIC)
  26     font_string += "|italic";
  27   if (style & gfx::Font::UNDERLINE)
  28     font_string += "|underline";
  29   return font_string;
  30 }
  31
  32 }  // namespace
  33
  34 namespace gfx {
  35
  36 TEST(FontListTest, ParseDescription) {
  37   std::vector<std::string> families;
  38   int style = gfx::Font::NORMAL;
  39   int size_pixels = 0;
  40
  41   // Parse a well-formed description containing styles and a size.
  42   EXPECT_TRUE(FontList::ParseDescription("Arial,Helvetica,Bold Italic 12px",
  43                                          &families, &style, &size_pixels));
  44   ASSERT_EQ(2U, families.size());
  45   EXPECT_EQ("Arial", families[0]);
  46   EXPECT_EQ("Helvetica", families[1]);
  47   EXPECT_EQ(gfx::Font::BOLD | gfx::Font::ITALIC, style);
  48   EXPECT_EQ(12, size_pixels);
  49
  50   // Whitespace should be removed.
  51   EXPECT_TRUE(FontList::ParseDescription("  Verdana , Italic  Bold   10px ",
  52                                          &families, &style, &size_pixels));
  53   ASSERT_EQ(1U, families.size());
  54   EXPECT_EQ("Verdana", families[0]);
  55   EXPECT_EQ(gfx::Font::BOLD | gfx::Font::ITALIC, style);
  56   EXPECT_EQ(10, size_pixels);
  57
  58   // Invalid descriptions should be rejected.
  59   EXPECT_FALSE(FontList::ParseDescription("", &families, &style, &size_pixels));
  60   EXPECT_FALSE(FontList::ParseDescription("Arial", &families, &style,
  61                                           &size_pixels));
  62   EXPECT_FALSE(FontList::ParseDescription("Arial,12", &families, &style,
  63                                           &size_pixels));
  64   EXPECT_FALSE(FontList::ParseDescription("Arial 12px", &families, &style,
  65                                           &size_pixels));
  66   EXPECT_FALSE(FontList::ParseDescription("Arial,12px,", &families, &style,
  67                                           &size_pixels));
  68   EXPECT_FALSE(FontList::ParseDescription("Arial,0px", &families, &style,
  69                                           &size_pixels));
  70   EXPECT_FALSE(FontList::ParseDescription("Arial,-1px", &families, &style,
  71                                           &size_pixels));
  72   EXPECT_FALSE(FontList::ParseDescription("Arial,foo 12px", &families, &style,
  73                                           &size_pixels));
  74 }
  75
  76 TEST(FontListTest, Fonts_FromDescString) {
  77   // Test init from font name size string.
  78   FontList font_list = FontList("arial, Courier New, 13px");
  79   const std::vector<Font>& fonts = font_list.GetFonts();
  80   ASSERT_EQ(2U, fonts.size());
  81   EXPECT_EQ("arial|13", FontToString(fonts[0]));
  82   EXPECT_EQ("Courier New|13", FontToString(fonts[1]));
  83 }
  84
  85 TEST(FontListTest, Fonts_FromDescStringInFlexibleFormat) {
  86   // Test init from font name size string with flexible format.
  87   FontList font_list = FontList("  arial   ,   Courier New ,   13px");
  88   const std::vector<Font>& fonts = font_list.GetFonts();
  89   ASSERT_EQ(2U, fonts.size());
  90   EXPECT_EQ("arial|13", FontToString(fonts[0]));
  91   EXPECT_EQ("Courier New|13", FontToString(fonts[1]));
  92 }
  93
  94 TEST(FontListTest, Fonts_FromDescStringWithStyleInFlexibleFormat) {
  95   // Test init from font name style size string with flexible format.
  96   FontList font_list = FontList("  arial  ,  Courier New ,  Bold   "
  97                                 "  Italic   13px");
  98   const std::vector<Font>& fonts = font_list.GetFonts();
  99   ASSERT_EQ(2U, fonts.size());
 100   EXPECT_EQ("arial|13|bold|italic", FontToString(fonts[0]));
 101   EXPECT_EQ("Courier New|13|bold|italic", FontToString(fonts[1]));
 102 }
 103
 104 TEST(FontListTest, Fonts_FromFont) {
 105   // Test init from Font.
 106   Font font("Arial", 8);
 107   FontList font_list = FontList(font);
 108   const std::vector<Font>& fonts = font_list.GetFonts();
 109   ASSERT_EQ(1U, fonts.size());
 110   EXPECT_EQ("Arial|8", FontToString(fonts[0]));
 111 }
 112
 113 TEST(FontListTest, Fonts_FromFontWithNonNormalStyle) {
 114   // Test init from Font with non-normal style.
 115   Font font("Arial", 8);
 116   FontList font_list = FontList(font.Derive(2, Font::BOLD));
 117   std::vector<Font> fonts = font_list.GetFonts();
 118   ASSERT_EQ(1U, fonts.size());
 119   EXPECT_EQ("Arial|10|bold", FontToString(fonts[0]));
 120
 121   font_list = FontList(font.Derive(-2, Font::ITALIC));
 122   fonts = font_list.GetFonts();
 123   ASSERT_EQ(1U, fonts.size());
 124   EXPECT_EQ("Arial|6|italic", FontToString(fonts[0]));
 125 }
 126
 127 TEST(FontListTest, Fonts_FromFontVector) {
 128   // Test init from Font vector.
 129   Font font("Arial", 8);
 130   Font font_1("Courier New", 10);
 131   std::vector<Font> input_fonts;
 132   input_fonts.push_back(font.Derive(0, Font::BOLD));
 133   input_fonts.push_back(font_1.Derive(-2, Font::BOLD));
 134   FontList font_list = FontList(input_fonts);
 135   const std::vector<Font>& fonts = font_list.GetFonts();
 136   ASSERT_EQ(2U, fonts.size());
 137   EXPECT_EQ("Arial|8|bold", FontToString(fonts[0]));
 138   EXPECT_EQ("Courier New|8|bold", FontToString(fonts[1]));
 139 }
 140
 141 TEST(FontListTest, FontDescString_GetStyle) {
 142   FontList font_list = FontList("Arial,Sans serif, 8px");
 143   EXPECT_EQ(Font::NORMAL, font_list.GetFontStyle());
 144
 145   font_list = FontList("Arial,Sans serif,Bold 8px");
 146   EXPECT_EQ(Font::BOLD, font_list.GetFontStyle());
 147
 148   font_list = FontList("Arial,Sans serif,Italic 8px");
 149   EXPECT_EQ(Font::ITALIC, font_list.GetFontStyle());
 150
 151   font_list = FontList("Arial,Italic Bold 8px");
 152   EXPECT_EQ(Font::BOLD | Font::ITALIC, font_list.GetFontStyle());
 153 }
 154
 155 TEST(FontListTest, Fonts_GetStyle) {
 156   std::vector<Font> fonts;
 157   fonts.push_back(gfx::Font("Arial", 8));
 158   fonts.push_back(gfx::Font("Sans serif", 8));
 159   FontList font_list = FontList(fonts);
 160   EXPECT_EQ(Font::NORMAL, font_list.GetFontStyle());
 161   fonts[0] = fonts[0].Derive(0, Font::ITALIC | Font::BOLD);
 162   fonts[1] = fonts[1].Derive(0, Font::ITALIC | Font::BOLD);
 163   font_list = FontList(fonts);
 164   EXPECT_EQ(Font::ITALIC | Font::BOLD, font_list.GetFontStyle());
 165 }
 166
 167 TEST(FontListTest, Fonts_Derive) {
 168   std::vector<Font> fonts;
 169   fonts.push_back(gfx::Font("Arial", 8));
 170   fonts.push_back(gfx::Font("Courier New", 8));
 171   FontList font_list = FontList(fonts);
 172
 173   FontList derived = font_list.Derive(5, Font::BOLD | Font::UNDERLINE);
 174   const std::vector<Font>& derived_fonts = derived.GetFonts();
 175
 176   EXPECT_EQ(2U, derived_fonts.size());
 177   EXPECT_EQ("Arial|13|bold|underline", FontToString(derived_fonts[0]));
 178   EXPECT_EQ("Courier New|13|bold|underline", FontToString(derived_fonts[1]));
 179 }
 180
 181 TEST(FontListTest, Fonts_DeriveWithSizeDelta) {
 182   std::vector<Font> fonts;
 183   fonts.push_back(gfx::Font("Arial", 18).Derive(0, Font::ITALIC));
 184   fonts.push_back(gfx::Font("Courier New", 18).Derive(0, Font::ITALIC));
 185   FontList font_list = FontList(fonts);
 186
 187   FontList derived = font_list.DeriveWithSizeDelta(-5);
 188   const std::vector<Font>& derived_fonts = derived.GetFonts();
 189
 190   EXPECT_EQ(2U, derived_fonts.size());
 191   EXPECT_EQ("Arial|13|italic", FontToString(derived_fonts[0]));
 192   EXPECT_EQ("Courier New|13|italic", FontToString(derived_fonts[1]));
 193 }
 194
 195 TEST(FontListTest, Fonts_GetHeight_GetBaseline) {
 196   // If a font list has only one font, the height and baseline must be the same.
 197   Font font1("Arial", 16);
 198   ASSERT_EQ("arial",
 199             base::StringToLowerASCII(font1.GetActualFontNameForTesting()));
 200   FontList font_list1("Arial, 16px");
 201   EXPECT_EQ(font1.GetHeight(), font_list1.GetHeight());
 202   EXPECT_EQ(font1.GetBaseline(), font_list1.GetBaseline());
 203
 204   // If there are two different fonts, the font list returns the max value
 205   // for the baseline (ascent) and height.
 206   Font font2("Symbol", 16);
 207   ASSERT_EQ("symbol",
 208             base::StringToLowerASCII(font2.GetActualFontNameForTesting()));
 209   EXPECT_NE(font1.GetBaseline(), font2.GetBaseline());
 210   // TODO(ananta): Find a size and font pair with reliably distinct descents.
 211   EXPECT_NE(font1.GetHeight(), font2.GetHeight());
 212   std::vector<Font> fonts;
 213   fonts.push_back(font1);
 214   fonts.push_back(font2);
 215   FontList font_list_mix(fonts);
 216   // ascent of FontList == max(ascent of Fonts)
 217   EXPECT_EQ(std::max(font1.GetBaseline(), font2.GetBaseline()),
 218             font_list_mix.GetBaseline());
 219   // descent of FontList == max(descent of Fonts)
 220   EXPECT_EQ(std::max(font1.GetHeight() - font1.GetBaseline(),
 221                      font2.GetHeight() - font2.GetBaseline()),
 222             font_list_mix.GetHeight() - font_list_mix.GetBaseline());
 223 }
 224
 225 TEST(FontListTest, Fonts_DeriveWithHeightUpperBound) {
 226   std::vector<Font> fonts;
 227
 228   fonts.push_back(gfx::Font("Arial", 18));
 229   fonts.push_back(gfx::Font("Sans serif", 18));
 230   fonts.push_back(gfx::Font("Symbol", 18));
 231   FontList font_list = FontList(fonts);
 232
 233   // A smaller upper bound should derive a font list with a smaller height.
 234   const int height_1 = font_list.GetHeight() - 5;
 235   FontList derived_1 = font_list.DeriveWithHeightUpperBound(height_1);
 236   EXPECT_LE(derived_1.GetHeight(), height_1);
 237   EXPECT_LT(derived_1.GetHeight(), font_list.GetHeight());
 238   EXPECT_LT(derived_1.GetFontSize(), font_list.GetFontSize());
 239
 240   // A larger upper bound should not change the height of the font list.
 241   const int height_2 = font_list.GetHeight() + 5;
 242   FontList derived_2 = font_list.DeriveWithHeightUpperBound(height_2);
 243   EXPECT_LE(derived_2.GetHeight(), height_2);
 244   EXPECT_EQ(font_list.GetHeight(), derived_2.GetHeight());
 245   EXPECT_EQ(font_list.GetFontSize(), derived_2.GetFontSize());
 246 }
 247
 248 }  // namespace gfx