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