ui/gfx/point3_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/point3_f.h"
   6
   7 #include "base/basictypes.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9
  10 namespace gfx {
  11
  12 TEST(Point3Test, VectorArithmetic) {
  13   gfx::Point3F a(1.6f, 5.1f, 3.2f);
  14   gfx::Vector3dF v1(3.1f, -3.2f, 9.3f);
  15   gfx::Vector3dF v2(-8.1f, 1.2f, 3.3f);
  16
  17   static const struct {
  18     gfx::Point3F expected;
  19     gfx::Point3F actual;
  20   } tests[] = {
  21     { gfx::Point3F(4.7f, 1.9f, 12.5f), a + v1 },
  22     { gfx::Point3F(-1.5f, 8.3f, -6.1f), a - v1 },
  23     { a, a - v1 + v1 },
  24     { a, a + v1 - v1 },
  25     { a, a + gfx::Vector3dF() },
  26     { gfx::Point3F(12.8f, 0.7f, 9.2f), a + v1 - v2 },
  27     { gfx::Point3F(-9.6f, 9.5f, -2.8f), a - v1 + v2 }
  28   };
  29
  30   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i)
  31     EXPECT_EQ(tests[i].expected.ToString(),
  32               tests[i].actual.ToString());
  33
  34   a += v1;
  35   EXPECT_EQ(Point3F(4.7f, 1.9f, 12.5f).ToString(), a.ToString());
  36
  37   a -= v2;
  38   EXPECT_EQ(Point3F(12.8f, 0.7f, 9.2f).ToString(), a.ToString());
  39 }
  40
  41 TEST(Point3Test, VectorFromPoints) {
  42   gfx::Point3F a(1.6f, 5.2f, 3.2f);
  43   gfx::Vector3dF v1(3.1f, -3.2f, 9.3f);
  44
  45   gfx::Point3F b(a + v1);
  46   EXPECT_EQ((b - a).ToString(), v1.ToString());
  47 }
  48
  49 TEST(Point3Test, Scale) {
  50   EXPECT_EQ(Point3F().ToString(), ScalePoint(Point3F(), 2.f).ToString());
  51   EXPECT_EQ(Point3F().ToString(),
  52             ScalePoint(Point3F(), 2.f, 2.f, 2.f).ToString());
  53
  54   EXPECT_EQ(Point3F(2.f, -2.f, 4.f).ToString(),
  55             ScalePoint(Point3F(1.f, -1.f, 2.f), 2.f).ToString());
  56   EXPECT_EQ(Point3F(2.f, -3.f, 8.f).ToString(),
  57             ScalePoint(Point3F(1.f, -1.f, 2.f), 2.f, 3.f, 4.f).ToString());
  58
  59   Point3F zero;
  60   zero.Scale(2.f);
  61   zero.Scale(6.f, 3.f, 1.5f);
  62   EXPECT_EQ(Point3F().ToString(), zero.ToString());
  63
  64   Point3F point(1.f, -1.f, 2.f);
  65   point.Scale(2.f);
  66   point.Scale(6.f, 3.f, 1.5f);
  67   EXPECT_EQ(Point3F(12.f, -6.f, 6.f).ToString(), point.ToString());
  68 }
  69
  70 }  // namespace gfx