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 "ui/gfx/animation/tween.h" 6 7 #include <math.h> 8 9 #if defined(OS_WIN) 10 #include <float.h> 11 #endif 12 13 #include "testing/gtest/include/gtest/gtest.h" 14 #include "ui/gfx/test/gfx_util.h" 15 16 namespace gfx { 17 namespace { 18 19 double next_double(double d) { 20 #if defined(OS_WIN) 21 return _nextafter(d, d + 1); 22 #else 23 // Step two units of least precision towards positive infinity. On some 32 24 // bit x86 compilers a single step was not enough due to loss of precision in 25 // optimized code. 26 return nextafter(nextafter(d, d + 1), d + 1); 27 #endif 28 } 29 30 // Validates that the same interpolations are made as in Blink. 31 TEST(TweenTest, ColorValueBetween) { 32 // From blink's AnimatableColorTest. 33 EXPECT_SKCOLOR_EQ(0xFF00FF00, 34 Tween::ColorValueBetween(-10.0, 0xFF00FF00, 0xFF00FF00)); 35 EXPECT_SKCOLOR_EQ(0xFF00FF00, 36 Tween::ColorValueBetween(-10.0, 0xFF00FF00, 0xFFFF00FF)); 37 EXPECT_SKCOLOR_EQ(0xFF00FF00, 38 Tween::ColorValueBetween(0.0, 0xFF00FF00, 0xFFFF00FF)); 39 EXPECT_SKCOLOR_EQ(0xFF01FE01, 40 Tween::ColorValueBetween(1.0 / 255, 0xFF00FF00, 0xFFFF00FF)); 41 EXPECT_SKCOLOR_EQ(0xFF808080, 42 Tween::ColorValueBetween(0.5, 0xFF00FF00, 0xFFFF00FF)); 43 EXPECT_SKCOLOR_EQ( 44 0xFFFE01FE, 45 Tween::ColorValueBetween(254.0 / 255.0, 0xFF00FF00, 0xFFFF00FF)); 46 EXPECT_SKCOLOR_EQ(0xFFFF00FF, 47 Tween::ColorValueBetween(1.0, 0xFF00FF00, 0xFFFF00FF)); 48 EXPECT_SKCOLOR_EQ(0xFFFF00FF, 49 Tween::ColorValueBetween(10.0, 0xFF00FF00, 0xFFFF00FF)); 50 EXPECT_SKCOLOR_EQ(0xFF0C253E, 51 Tween::ColorValueBetween(3.0 / 16.0, 0xFF001020, 0xFF4080C0)); 52 EXPECT_SKCOLOR_EQ(0x80FF00FF, 53 Tween::ColorValueBetween(0.5, 0x0000FF00, 0xFFFF00FF)); 54 EXPECT_SKCOLOR_EQ(0x60AA55AA, 55 Tween::ColorValueBetween(0.5, 0x4000FF00, 0x80FF00FF)); 56 EXPECT_SKCOLOR_EQ(0x60FFAAFF, 57 Tween::ColorValueBetween(0.5, 0x40FF00FF, 0x80FFFFFF)); 58 EXPECT_SKCOLOR_EQ(0x103060A0, 59 Tween::ColorValueBetween(0.5, 0x10204080, 0x104080C0)); 60 } 61 62 // Ensures that each of the 3 integers in [0, 1, 2] ae selected with equal 63 // weight. 64 TEST(TweenTest, IntValueBetween) { 65 EXPECT_EQ(0, Tween::IntValueBetween(0.0, 0, 2)); 66 EXPECT_EQ(0, Tween::IntValueBetween(0.5 / 3.0, 0, 2)); 67 EXPECT_EQ(0, Tween::IntValueBetween(1.0 / 3.0, 0, 2)); 68 69 EXPECT_EQ(1, Tween::IntValueBetween(next_double(1.0 / 3.0), 0, 2)); 70 EXPECT_EQ(1, Tween::IntValueBetween(1.5 / 3.0, 0, 2)); 71 EXPECT_EQ(1, Tween::IntValueBetween(2.0 / 3.0, 0, 2)); 72 73 EXPECT_EQ(2, Tween::IntValueBetween(next_double(2.0 / 3.0), 0, 2)); 74 EXPECT_EQ(2, Tween::IntValueBetween(2.5 / 3.0, 0, 2)); 75 EXPECT_EQ(2, Tween::IntValueBetween(3.0 / 3.0, 0, 2)); 76 } 77 78 TEST(TweenTest, IntValueBetweenNegative) { 79 EXPECT_EQ(-2, Tween::IntValueBetween(0.0, -2, 0)); 80 EXPECT_EQ(-2, Tween::IntValueBetween(0.5 / 3.0, -2, 0)); 81 EXPECT_EQ(-2, Tween::IntValueBetween(1.0 / 3.0, -2, 0)); 82 83 EXPECT_EQ(-1, Tween::IntValueBetween(next_double(1.0 / 3.0), -2, 0)); 84 EXPECT_EQ(-1, Tween::IntValueBetween(1.5 / 3.0, -2, 0)); 85 EXPECT_EQ(-1, Tween::IntValueBetween(2.0 / 3.0, -2, 0)); 86 87 EXPECT_EQ(0, Tween::IntValueBetween(next_double(2.0 / 3.0), -2, 0)); 88 EXPECT_EQ(0, Tween::IntValueBetween(2.5 / 3.0, -2, 0)); 89 EXPECT_EQ(0, Tween::IntValueBetween(3.0 / 3.0, -2, 0)); 90 } 91 92 TEST(TweenTest, IntValueBetweenReverse) { 93 EXPECT_EQ(2, Tween::IntValueBetween(0.0, 2, 0)); 94 EXPECT_EQ(2, Tween::IntValueBetween(0.5 / 3.0, 2, 0)); 95 EXPECT_EQ(2, Tween::IntValueBetween(1.0 / 3.0, 2, 0)); 96 97 EXPECT_EQ(1, Tween::IntValueBetween(next_double(1.0 / 3.0), 2, 0)); 98 EXPECT_EQ(1, Tween::IntValueBetween(1.5 / 3.0, 2, 0)); 99 EXPECT_EQ(1, Tween::IntValueBetween(2.0 / 3.0, 2, 0)); 100 101 EXPECT_EQ(0, Tween::IntValueBetween(next_double(2.0 / 3.0), 2, 0)); 102 EXPECT_EQ(0, Tween::IntValueBetween(2.5 / 3.0, 2, 0)); 103 EXPECT_EQ(0, Tween::IntValueBetween(3.0 / 3.0, 2, 0)); 104 } 105 106 TEST(TweenTest, LinearIntValueBetween) { 107 EXPECT_EQ(0, Tween::LinearIntValueBetween(0.0, 0, 2)); 108 EXPECT_EQ(0, Tween::LinearIntValueBetween(0.5 / 4.0, 0, 2)); 109 EXPECT_EQ(0, Tween::LinearIntValueBetween(0.99 / 4.0, 0, 2)); 110 111 EXPECT_EQ(1, Tween::LinearIntValueBetween(1.0 / 4.0, 0, 2)); 112 EXPECT_EQ(1, Tween::LinearIntValueBetween(1.5 / 4.0, 0, 2)); 113 EXPECT_EQ(1, Tween::LinearIntValueBetween(2.0 / 4.0, 0, 2)); 114 EXPECT_EQ(1, Tween::LinearIntValueBetween(2.5 / 4.0, 0, 2)); 115 EXPECT_EQ(1, Tween::LinearIntValueBetween(2.99 / 4.0, 0, 2)); 116 117 EXPECT_EQ(2, Tween::LinearIntValueBetween(3.0 / 4.0, 0, 2)); 118 EXPECT_EQ(2, Tween::LinearIntValueBetween(3.5 / 4.0, 0, 2)); 119 EXPECT_EQ(2, Tween::LinearIntValueBetween(4.0 / 4.0, 0, 2)); 120 } 121 122 TEST(TweenTest, LinearIntValueBetweenNegative) { 123 EXPECT_EQ(-2, Tween::LinearIntValueBetween(0.0, -2, 0)); 124 EXPECT_EQ(-2, Tween::LinearIntValueBetween(0.5 / 4.0, -2, 0)); 125 EXPECT_EQ(-2, Tween::LinearIntValueBetween(0.99 / 4.0, -2, 0)); 126 127 EXPECT_EQ(-1, Tween::LinearIntValueBetween(1.0 / 4.0, -2, 0)); 128 EXPECT_EQ(-1, Tween::LinearIntValueBetween(1.5 / 4.0, -2, 0)); 129 EXPECT_EQ(-1, Tween::LinearIntValueBetween(2.0 / 4.0, -2, 0)); 130 EXPECT_EQ(-1, Tween::LinearIntValueBetween(2.5 / 4.0, -2, 0)); 131 EXPECT_EQ(-1, Tween::LinearIntValueBetween(2.99 / 4.0, -2, 0)); 132 133 EXPECT_EQ(0, Tween::LinearIntValueBetween(3.0 / 4.0, -2, 0)); 134 EXPECT_EQ(0, Tween::LinearIntValueBetween(3.5 / 4.0, -2, 0)); 135 EXPECT_EQ(0, Tween::LinearIntValueBetween(4.0 / 4.0, -2, 0)); 136 } 137 138 } // namespace 139 } // namespace gfx 140
