ui/gfx/point_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/point_base.h"
   6
   7 #include "base/basictypes.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9 #include "ui/gfx/point.h"
  10 #include "ui/gfx/point_conversions.h"
  11 #include "ui/gfx/point_f.h"
  12
  13 namespace gfx {
  14
  15 namespace {
  16
  17 int TestPointF(const PointF& p) {
  18   return p.x();
  19 }
  20
  21 }  // namespace
  22
  23 TEST(PointTest, ToPointF) {
  24   // Check that implicit conversion from integer to float compiles.
  25   Point a(10, 20);
  26   float x = TestPointF(a);
  27   EXPECT_EQ(x, a.x());
  28
  29   PointF b(10, 20);
  30   EXPECT_EQ(a, b);
  31   EXPECT_EQ(b, a);
  32 }
  33
  34 TEST(PointTest, IsOrigin) {
  35   EXPECT_FALSE(Point(1, 0).IsOrigin());
  36   EXPECT_FALSE(Point(0, 1).IsOrigin());
  37   EXPECT_FALSE(Point(1, 2).IsOrigin());
  38   EXPECT_FALSE(Point(-1, 0).IsOrigin());
  39   EXPECT_FALSE(Point(0, -1).IsOrigin());
  40   EXPECT_FALSE(Point(-1, -2).IsOrigin());
  41   EXPECT_TRUE(Point(0, 0).IsOrigin());
  42
  43   EXPECT_FALSE(PointF(0.1f, 0).IsOrigin());
  44   EXPECT_FALSE(PointF(0, 0.1f).IsOrigin());
  45   EXPECT_FALSE(PointF(0.1f, 2).IsOrigin());
  46   EXPECT_FALSE(PointF(-0.1f, 0).IsOrigin());
  47   EXPECT_FALSE(PointF(0, -0.1f).IsOrigin());
  48   EXPECT_FALSE(PointF(-0.1f, -2).IsOrigin());
  49   EXPECT_TRUE(PointF(0, 0).IsOrigin());
  50 }
  51
  52 TEST(PointTest, VectorArithmetic) {
  53   Point a(1, 5);
  54   Vector2d v1(3, -3);
  55   Vector2d v2(-8, 1);
  56
  57   static const struct {
  58     Point expected;
  59     Point actual;
  60   } tests[] = {
  61     { Point(4, 2), a + v1 },
  62     { Point(-2, 8), a - v1 },
  63     { a, a - v1 + v1 },
  64     { a, a + v1 - v1 },
  65     { a, a + Vector2d() },
  66     { Point(12, 1), a + v1 - v2 },
  67     { Point(-10, 9), a - v1 + v2 }
  68   };
  69
  70   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i)
  71     EXPECT_EQ(tests[i].expected.ToString(), tests[i].actual.ToString());
  72 }
  73
  74 TEST(PointTest, OffsetFromPoint) {
  75   Point a(1, 5);
  76   Point b(-20, 8);
  77   EXPECT_EQ(Vector2d(-20 - 1, 8 - 5).ToString(), (b - a).ToString());
  78 }
  79
  80 TEST(PointTest, ToRoundedPoint) {
  81   EXPECT_EQ(Point(0, 0), ToRoundedPoint(PointF(0, 0)));
  82   EXPECT_EQ(Point(0, 0), ToRoundedPoint(PointF(0.0001f, 0.0001f)));
  83   EXPECT_EQ(Point(0, 0), ToRoundedPoint(PointF(0.4999f, 0.4999f)));
  84   EXPECT_EQ(Point(1, 1), ToRoundedPoint(PointF(0.5f, 0.5f)));
  85   EXPECT_EQ(Point(1, 1), ToRoundedPoint(PointF(0.9999f, 0.9999f)));
  86
  87   EXPECT_EQ(Point(10, 10), ToRoundedPoint(PointF(10, 10)));
  88   EXPECT_EQ(Point(10, 10), ToRoundedPoint(PointF(10.0001f, 10.0001f)));
  89   EXPECT_EQ(Point(10, 10), ToRoundedPoint(PointF(10.4999f, 10.4999f)));
  90   EXPECT_EQ(Point(11, 11), ToRoundedPoint(PointF(10.5f, 10.5f)));
  91   EXPECT_EQ(Point(11, 11), ToRoundedPoint(PointF(10.9999f, 10.9999f)));
  92
  93   EXPECT_EQ(Point(-10, -10), ToRoundedPoint(PointF(-10, -10)));
  94   EXPECT_EQ(Point(-10, -10), ToRoundedPoint(PointF(-10.0001f, -10.0001f)));
  95   EXPECT_EQ(Point(-10, -10), ToRoundedPoint(PointF(-10.4999f, -10.4999f)));
  96   EXPECT_EQ(Point(-11, -11), ToRoundedPoint(PointF(-10.5f, -10.5f)));
  97   EXPECT_EQ(Point(-11, -11), ToRoundedPoint(PointF(-10.9999f, -10.9999f)));
  98 }
  99
 100 TEST(PointTest, Scale) {
 101   EXPECT_EQ(PointF().ToString(), ScalePoint(Point(), 2).ToString());
 102   EXPECT_EQ(PointF().ToString(), ScalePoint(Point(), 2, 2).ToString());
 103
 104   EXPECT_EQ(PointF(2, -2).ToString(),
 105             ScalePoint(Point(1, -1), 2).ToString());
 106   EXPECT_EQ(PointF(2, -2).ToString(),
 107             ScalePoint(Point(1, -1), 2, 2).ToString());
 108
 109   PointF zero;
 110   PointF one(1, -1);
 111
 112   zero.Scale(2);
 113   zero.Scale(3, 1.5);
 114
 115   one.Scale(2);
 116   one.Scale(3, 1.5);
 117
 118   EXPECT_EQ(PointF().ToString(), zero.ToString());
 119   EXPECT_EQ(PointF(6, -3).ToString(), one.ToString());
 120 }
 121
 122 TEST(PointTest, ClampPoint) {
 123   Point a;
 124
 125   a = Point(3, 5);
 126   EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
 127   a.SetToMax(Point(2, 4));
 128   EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
 129   a.SetToMax(Point(3, 5));
 130   EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
 131   a.SetToMax(Point(4, 2));
 132   EXPECT_EQ(Point(4, 5).ToString(), a.ToString());
 133   a.SetToMax(Point(8, 10));
 134   EXPECT_EQ(Point(8, 10).ToString(), a.ToString());
 135
 136   a.SetToMin(Point(9, 11));
 137   EXPECT_EQ(Point(8, 10).ToString(), a.ToString());
 138   a.SetToMin(Point(8, 10));
 139   EXPECT_EQ(Point(8, 10).ToString(), a.ToString());
 140   a.SetToMin(Point(11, 9));
 141   EXPECT_EQ(Point(8, 9).ToString(), a.ToString());
 142   a.SetToMin(Point(7, 11));
 143   EXPECT_EQ(Point(7, 9).ToString(), a.ToString());
 144   a.SetToMin(Point(3, 5));
 145   EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
 146 }
 147
 148 TEST(PointTest, ClampPointF) {
 149   PointF a;
 150
 151   a = PointF(3.5f, 5.5f);
 152   EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
 153   a.SetToMax(PointF(2.5f, 4.5f));
 154   EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
 155   a.SetToMax(PointF(3.5f, 5.5f));
 156   EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
 157   a.SetToMax(PointF(4.5f, 2.5f));
 158   EXPECT_EQ(PointF(4.5f, 5.5f).ToString(), a.ToString());
 159   a.SetToMax(PointF(8.5f, 10.5f));
 160   EXPECT_EQ(PointF(8.5f, 10.5f).ToString(), a.ToString());
 161
 162   a.SetToMin(PointF(9.5f, 11.5f));
 163   EXPECT_EQ(PointF(8.5f, 10.5f).ToString(), a.ToString());
 164   a.SetToMin(PointF(8.5f, 10.5f));
 165   EXPECT_EQ(PointF(8.5f, 10.5f).ToString(), a.ToString());
 166   a.SetToMin(PointF(11.5f, 9.5f));
 167   EXPECT_EQ(PointF(8.5f, 9.5f).ToString(), a.ToString());
 168   a.SetToMin(PointF(7.5f, 11.5f));
 169   EXPECT_EQ(PointF(7.5f, 9.5f).ToString(), a.ToString());
 170   a.SetToMin(PointF(3.5f, 5.5f));
 171   EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
 172 }
 173
 174 }  // namespace gfx