ui/gfx/break_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/break_list.h"
   6
   7 #include "testing/gtest/include/gtest/gtest.h"
   8 #include "third_party/skia/include/core/SkColor.h"
   9 #include "ui/gfx/range/range.h"
  10
  11 namespace gfx {
  12
  13 class BreakListTest : public testing::Test {};
  14
  15 TEST_F(BreakListTest, SetValue) {
  16   // Check the default values applied to new instances.
  17   BreakList<bool> style_breaks(false);
  18   EXPECT_TRUE(style_breaks.EqualsValueForTesting(false));
  19   style_breaks.SetValue(true);
  20   EXPECT_TRUE(style_breaks.EqualsValueForTesting(true));
  21
  22   // Ensure that setting values works correctly.
  23   BreakList<SkColor> color_breaks(SK_ColorRED);
  24   EXPECT_TRUE(color_breaks.EqualsValueForTesting(SK_ColorRED));
  25   color_breaks.SetValue(SK_ColorBLACK);
  26   EXPECT_TRUE(color_breaks.EqualsValueForTesting(SK_ColorBLACK));
  27 }
  28
  29 TEST_F(BreakListTest, ApplyValue) {
  30   BreakList<bool> breaks(false);
  31   const size_t max = 99;
  32   breaks.SetMax(max);
  33
  34   // Ensure ApplyValue is a no-op on invalid and empty ranges.
  35   breaks.ApplyValue(true, Range::InvalidRange());
  36   EXPECT_TRUE(breaks.EqualsValueForTesting(false));
  37   for (size_t i = 0; i < 3; ++i) {
  38     breaks.ApplyValue(true, Range(i, i));
  39     EXPECT_TRUE(breaks.EqualsValueForTesting(false));
  40   }
  41
  42   // Apply a value to a valid range, check breaks; repeating should be no-op.
  43   std::vector<std::pair<size_t, bool> > expected;
  44   expected.push_back(std::pair<size_t, bool>(0, false));
  45   expected.push_back(std::pair<size_t, bool>(2, true));
  46   expected.push_back(std::pair<size_t, bool>(3, false));
  47   for (size_t i = 0; i < 2; ++i) {
  48     breaks.ApplyValue(true, Range(2, 3));
  49     EXPECT_TRUE(breaks.EqualsForTesting(expected));
  50   }
  51
  52   // Ensure setting a value overrides the ranged value.
  53   breaks.SetValue(true);
  54   EXPECT_TRUE(breaks.EqualsValueForTesting(true));
  55
  56   // Ensure applying a value over [0, |max|) is the same as setting a value.
  57   breaks.ApplyValue(false, Range(0, max));
  58   EXPECT_TRUE(breaks.EqualsValueForTesting(false));
  59
  60   // Ensure applying a value that is already applied has no effect.
  61   breaks.ApplyValue(false, Range(0, 2));
  62   breaks.ApplyValue(false, Range(3, 6));
  63   breaks.ApplyValue(false, Range(7, max));
  64   EXPECT_TRUE(breaks.EqualsValueForTesting(false));
  65
  66   // Ensure applying an identical neighboring value merges the ranges.
  67   breaks.ApplyValue(true, Range(0, 3));
  68   breaks.ApplyValue(true, Range(3, 6));
  69   breaks.ApplyValue(true, Range(6, max));
  70   EXPECT_TRUE(breaks.EqualsValueForTesting(true));
  71
  72   // Ensure applying a value with the same range overrides the ranged value.
  73   breaks.ApplyValue(false, Range(2, 3));
  74   breaks.ApplyValue(true, Range(2, 3));
  75   EXPECT_TRUE(breaks.EqualsValueForTesting(true));
  76
  77   // Ensure applying a value with a containing range overrides contained values.
  78   breaks.ApplyValue(false, Range(0, 1));
  79   breaks.ApplyValue(false, Range(2, 3));
  80   breaks.ApplyValue(true, Range(0, 3));
  81   EXPECT_TRUE(breaks.EqualsValueForTesting(true));
  82   breaks.ApplyValue(false, Range(4, 5));
  83   breaks.ApplyValue(false, Range(6, 7));
  84   breaks.ApplyValue(false, Range(8, 9));
  85   breaks.ApplyValue(true, Range(4, 9));
  86   EXPECT_TRUE(breaks.EqualsValueForTesting(true));
  87
  88   // Ensure applying various overlapping values yields the intended results.
  89   breaks.ApplyValue(false, Range(1, 4));
  90   breaks.ApplyValue(false, Range(5, 8));
  91   breaks.ApplyValue(true, Range(0, 2));
  92   breaks.ApplyValue(true, Range(3, 6));
  93   breaks.ApplyValue(true, Range(7, max));
  94   std::vector<std::pair<size_t, bool> > overlap;
  95   overlap.push_back(std::pair<size_t, bool>(0, true));
  96   overlap.push_back(std::pair<size_t, bool>(2, false));
  97   overlap.push_back(std::pair<size_t, bool>(3, true));
  98   overlap.push_back(std::pair<size_t, bool>(6, false));
  99   overlap.push_back(std::pair<size_t, bool>(7, true));
 100   EXPECT_TRUE(breaks.EqualsForTesting(overlap));
 101 }
 102
 103 TEST_F(BreakListTest, SetMax) {
 104   // Ensure values adjust to accommodate max position changes.
 105   BreakList<bool> breaks(false);
 106   breaks.SetMax(9);
 107   breaks.ApplyValue(true, Range(0, 2));
 108   breaks.ApplyValue(true, Range(3, 6));
 109   breaks.ApplyValue(true, Range(7, 9));
 110
 111   std::vector<std::pair<size_t, bool> > expected;
 112   expected.push_back(std::pair<size_t, bool>(0, true));
 113   expected.push_back(std::pair<size_t, bool>(2, false));
 114   expected.push_back(std::pair<size_t, bool>(3, true));
 115   expected.push_back(std::pair<size_t, bool>(6, false));
 116   expected.push_back(std::pair<size_t, bool>(7, true));
 117   EXPECT_TRUE(breaks.EqualsForTesting(expected));
 118
 119   // Setting a smaller max should remove any corresponding breaks.
 120   breaks.SetMax(7);
 121   expected.resize(4);
 122   EXPECT_TRUE(breaks.EqualsForTesting(expected));
 123   breaks.SetMax(4);
 124   expected.resize(3);
 125   EXPECT_TRUE(breaks.EqualsForTesting(expected));
 126   breaks.SetMax(4);
 127   EXPECT_TRUE(breaks.EqualsForTesting(expected));
 128
 129   // Setting a larger max should not change any breaks.
 130   breaks.SetMax(50);
 131   EXPECT_TRUE(breaks.EqualsForTesting(expected));
 132 }
 133
 134 TEST_F(BreakListTest, GetBreakAndRange) {
 135   BreakList<bool> breaks(false);
 136   breaks.SetMax(8);
 137   breaks.ApplyValue(true, Range(1, 2));
 138   breaks.ApplyValue(true, Range(4, 6));
 139
 140   struct {
 141     size_t position;
 142     size_t break_index;
 143     Range range;
 144   } cases[] = {
 145     { 0, 0, Range(0, 1) },
 146     { 1, 1, Range(1, 2) },
 147     { 2, 2, Range(2, 4) },
 148     { 3, 2, Range(2, 4) },
 149     { 4, 3, Range(4, 6) },
 150     { 5, 3, Range(4, 6) },
 151     { 6, 4, Range(6, 8) },
 152     { 7, 4, Range(6, 8) },
 153     // Positions at or beyond the max simply return the last break and range.
 154     { 8, 4, Range(6, 8) },
 155     { 9, 4, Range(6, 8) },
 156   };
 157
 158
 159   for (size_t i = 0; i < arraysize(cases); ++i) {
 160     BreakList<bool>::const_iterator it = breaks.GetBreak(cases[i].position);
 161     EXPECT_EQ(breaks.breaks()[cases[i].break_index], *it);
 162     EXPECT_EQ(breaks.GetRange(it), cases[i].range);
 163   }
 164 }
 165
 166 }  // namespace gfx