src/ui/gfx/image/image_family_unittest.cc

   1 // Copyright 2013 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 "testing/gtest/include/gtest/gtest.h"
   6 #include "ui/gfx/image/image.h"
   7 #include "ui/gfx/image/image_family.h"
   8 #include "ui/gfx/image/image_skia.h"
   9 #include "ui/gfx/image/image_unittest_util.h"
  10
  11 namespace {
  12
  13 namespace gt = gfx::test;
  14
  15 // Tests that |image| != NULL, and has the given width and height.
  16 // This is a macro instead of a function, so that the correct line numbers are
  17 // reported when a test fails.
  18 #define EXPECT_IMAGE_NON_NULL_AND_SIZE(image, expected_width, expected_height) \
  19 do { \
  20   const gfx::Image* image_ = image; \
  21   EXPECT_TRUE(image_); \
  22   EXPECT_EQ(expected_width, image_->Width()); \
  23   EXPECT_EQ(expected_height, image_->Height()); \
  24 } while(0)
  25
  26 class ImageFamilyTest : public testing::Test {
  27  public:
  28   // Construct an ImageFamily. Implicitly tests Add and Empty.
  29   virtual void SetUp() OVERRIDE {
  30     EXPECT_TRUE(image_family_.empty());
  31
  32     // Aspect ratio 1:1.
  33     image_family_.Add(gt::CreateImageSkia(32, 32));
  34     EXPECT_FALSE(image_family_.empty());
  35     image_family_.Add(gt::CreateImageSkia(16, 16));
  36     image_family_.Add(gt::CreateImageSkia(64, 64));
  37     // Duplicate (should override previous one).
  38     // Insert an Image directly, instead of an ImageSkia.
  39     gfx::Image image(gt::CreateImageSkia(32, 32));
  40     image_family_.Add(image);
  41     // Aspect ratio 1:4.
  42     image_family_.Add(gt::CreateImageSkia(3, 12));
  43     image_family_.Add(gt::CreateImageSkia(12, 48));
  44     // Aspect ratio 4:1.
  45     image_family_.Add(gt::CreateImageSkia(512, 128));
  46     image_family_.Add(gt::CreateImageSkia(256, 64));
  47
  48     EXPECT_FALSE(image_family_.empty());
  49   }
  50
  51   gfx::ImageFamily image_family_;
  52 };
  53
  54 TEST_F(ImageFamilyTest, Clear) {
  55   image_family_.clear();
  56   EXPECT_TRUE(image_family_.empty());
  57 }
  58
  59 // Tests iteration over an ImageFamily.
  60 TEST_F(ImageFamilyTest, Iteration) {
  61   gfx::ImageFamily::const_iterator it = image_family_.begin();
  62   gfx::ImageFamily::const_iterator end = image_family_.end();
  63
  64   // Expect iteration in order of aspect ratio (from thinnest to widest), then
  65   // size.
  66   EXPECT_TRUE(it != end);
  67   EXPECT_EQ(gfx::Size(3, 12), it->Size());
  68   ++it;
  69   EXPECT_TRUE(it != end);
  70   EXPECT_EQ(gfx::Size(12, 48), it->Size());
  71   it++;   // Test post-increment.
  72   EXPECT_TRUE(it != end);
  73   EXPECT_EQ(gfx::Size(16, 16), it->Size());
  74   ++it;
  75   EXPECT_TRUE(it != end);
  76   EXPECT_EQ(gfx::Size(32, 32), it->Size());
  77   --it;   // Test decrement
  78   EXPECT_TRUE(it != end);
  79   EXPECT_EQ(gfx::Size(16, 16), it->Size());
  80   ++it;
  81   ++it;
  82   EXPECT_TRUE(it != end);
  83   EXPECT_EQ(gfx::Size(64, 64), (*it).Size());   // Test operator*.
  84   ++it;
  85   EXPECT_TRUE(it != end);
  86   EXPECT_EQ(gfx::Size(256, 64), it->Size());
  87   ++it;
  88   EXPECT_TRUE(it != end);
  89   EXPECT_EQ(gfx::Size(512, 128), it->Size());
  90   ++it;
  91
  92   EXPECT_TRUE(it == end);
  93 }
  94
  95 TEST_F(ImageFamilyTest, Get) {
  96   // Get on an empty family.
  97   gfx::ImageFamily empty_family;
  98   EXPECT_TRUE(empty_family.empty());
  99   EXPECT_FALSE(empty_family.GetBest(32, 32));
 100   EXPECT_FALSE(empty_family.GetBest(0, 32));
 101   EXPECT_FALSE(empty_family.GetBest(32, 0));
 102
 103   // Get various aspect ratios and sizes on the sample family.
 104
 105   // 0x0 (expect the smallest square image).
 106   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(0, 0), 16, 16);
 107   // GetBest(0, N) or GetBest(N, 0) should be treated the same as GetBest(0, 0).
 108   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(0, 16), 16, 16);
 109   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(0, 64), 16, 16);
 110   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(16, 0), 16, 16);
 111   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(64, 0), 16, 16);
 112
 113   // Thinner than thinnest image.
 114   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(2, 12), 3, 12);
 115   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(2, 13), 12, 48);
 116   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(10, 60), 12, 48);
 117
 118   // Between two images' aspect ratio.
 119   // Note: Testing the boundary around 1:2 and 2:1, half way to 1:4 and 4:1.
 120   // Ties are broken by favouring the thinner aspect ratio.
 121   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(63, 32), 64, 64);
 122   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(64, 32), 64, 64);
 123   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(65, 32), 256, 64);
 124   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(32, 63), 64, 64);
 125   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(32, 64), 12, 48);
 126   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(32, 65), 12, 48);
 127
 128   // Exact match aspect ratio.
 129   // Exact match size.
 130   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(32, 32), 32, 32);
 131   // Slightly smaller.
 132   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(31, 31), 32, 32);
 133   // Much smaller.
 134   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(17, 17), 32, 32);
 135   // Exact match size.
 136   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(16, 16), 16, 16);
 137   // Smaller than any image.
 138   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(3, 3), 16, 16);
 139   // Larger than any image.
 140   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(512, 512), 64, 64);
 141   // 1:4 aspect ratio.
 142   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(16, 64), 12, 48);
 143   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(2, 8), 3, 12);
 144   // 4:1 aspect ratio.
 145   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(64, 16), 256, 64);
 146   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(260, 65), 512, 128);
 147
 148   // Wider than widest image.
 149   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(255, 51), 256, 64);
 150   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(260, 52), 512, 128);
 151   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(654, 129), 512, 128);
 152 }
 153
 154 // Test adding and looking up images with 0 width and height.
 155 TEST_F(ImageFamilyTest, ZeroWidthAndHeight) {
 156   // An empty Image. Should be considered to have 0 width and height.
 157   image_family_.Add(gfx::Image());
 158   // Images with 0 width OR height should be treated the same as an image with 0
 159   // width AND height (in fact, the ImageSkias should be indistinguishable).
 160   image_family_.Add(gt::CreateImageSkia(32, 0));
 161   image_family_.Add(gt::CreateImageSkia(0, 32));
 162
 163   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(0, 0), 0, 0);
 164   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(1, 1), 16, 16);
 165   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(32, 32), 32, 32);
 166
 167   // GetBest(0, N) or GetBest(N, 0) should be treated the same as GetBest(0, 0).
 168   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(0, 1), 0, 0);
 169   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(0, 32), 0, 0);
 170   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(1, 0), 0, 0);
 171   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(32, 0), 0, 0);
 172
 173   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(1, 32), 12, 48);
 174   EXPECT_IMAGE_NON_NULL_AND_SIZE(image_family_.GetBest(32, 1), 256, 64);
 175 }
 176
 177 }  // namespace