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/geometry/safe_integer_conversions.h" 6 7 #include <limits> 8 9 #include "testing/gtest/include/gtest/gtest.h" 10 11 namespace gfx { 12 13 TEST(SafeIntegerConversions, ClampToInt) { 14 EXPECT_EQ(0, ClampToInt(std::numeric_limits<float>::quiet_NaN())); 15 16 float max = std::numeric_limits<int>::max(); 17 float min = std::numeric_limits<int>::min(); 18 float infinity = std::numeric_limits<float>::infinity(); 19 20 int int_max = std::numeric_limits<int>::max(); 21 int int_min = std::numeric_limits<int>::min(); 22 23 EXPECT_EQ(int_max, ClampToInt(infinity)); 24 EXPECT_EQ(int_max, ClampToInt(max)); 25 EXPECT_EQ(int_max, ClampToInt(max + 100)); 26 27 EXPECT_EQ(-100, ClampToInt(-100.5f)); 28 EXPECT_EQ(0, ClampToInt(0)); 29 EXPECT_EQ(100, ClampToInt(100.5f)); 30 31 EXPECT_EQ(int_min, ClampToInt(-infinity)); 32 EXPECT_EQ(int_min, ClampToInt(min)); 33 EXPECT_EQ(int_min, ClampToInt(min - 100)); 34 } 35 36 TEST(SafeIntegerConversions, ToFlooredInt) { 37 EXPECT_EQ(0, ToFlooredInt(std::numeric_limits<float>::quiet_NaN())); 38 39 float max = std::numeric_limits<int>::max(); 40 float min = std::numeric_limits<int>::min(); 41 float infinity = std::numeric_limits<float>::infinity(); 42 43 int int_max = std::numeric_limits<int>::max(); 44 int int_min = std::numeric_limits<int>::min(); 45 46 EXPECT_EQ(int_max, ToFlooredInt(infinity)); 47 EXPECT_EQ(int_max, ToFlooredInt(max)); 48 EXPECT_EQ(int_max, ToFlooredInt(max + 100)); 49 50 EXPECT_EQ(-101, ToFlooredInt(-100.5f)); 51 EXPECT_EQ(0, ToFlooredInt(0)); 52 EXPECT_EQ(100, ToFlooredInt(100.5f)); 53 54 EXPECT_EQ(int_min, ToFlooredInt(-infinity)); 55 EXPECT_EQ(int_min, ToFlooredInt(min)); 56 EXPECT_EQ(int_min, ToFlooredInt(min - 100)); 57 } 58 59 TEST(SafeIntegerConversions, ToCeiledInt) { 60 EXPECT_EQ(0, ToCeiledInt(std::numeric_limits<float>::quiet_NaN())); 61 62 float max = std::numeric_limits<int>::max(); 63 float min = std::numeric_limits<int>::min(); 64 float infinity = std::numeric_limits<float>::infinity(); 65 66 int int_max = std::numeric_limits<int>::max(); 67 int int_min = std::numeric_limits<int>::min(); 68 69 EXPECT_EQ(int_max, ToCeiledInt(infinity)); 70 EXPECT_EQ(int_max, ToCeiledInt(max)); 71 EXPECT_EQ(int_max, ToCeiledInt(max + 100)); 72 73 EXPECT_EQ(-100, ToCeiledInt(-100.5f)); 74 EXPECT_EQ(0, ToCeiledInt(0)); 75 EXPECT_EQ(101, ToCeiledInt(100.5f)); 76 77 EXPECT_EQ(int_min, ToCeiledInt(-infinity)); 78 EXPECT_EQ(int_min, ToCeiledInt(min)); 79 EXPECT_EQ(int_min, ToCeiledInt(min - 100)); 80 } 81 82 TEST(SafeIntegerConversions, ToRoundedInt) { 83 EXPECT_EQ(0, ToRoundedInt(std::numeric_limits<float>::quiet_NaN())); 84 85 float max = std::numeric_limits<int>::max(); 86 float min = std::numeric_limits<int>::min(); 87 float infinity = std::numeric_limits<float>::infinity(); 88 89 int int_max = std::numeric_limits<int>::max(); 90 int int_min = std::numeric_limits<int>::min(); 91 92 EXPECT_EQ(int_max, ToRoundedInt(infinity)); 93 EXPECT_EQ(int_max, ToRoundedInt(max)); 94 EXPECT_EQ(int_max, ToRoundedInt(max + 100)); 95 96 EXPECT_EQ(-100, ToRoundedInt(-100.1f)); 97 EXPECT_EQ(-101, ToRoundedInt(-100.5f)); 98 EXPECT_EQ(-101, ToRoundedInt(-100.9f)); 99 EXPECT_EQ(0, ToRoundedInt(0)); 100 EXPECT_EQ(100, ToRoundedInt(100.1f)); 101 EXPECT_EQ(101, ToRoundedInt(100.5f)); 102 EXPECT_EQ(101, ToRoundedInt(100.9f)); 103 104 EXPECT_EQ(int_min, ToRoundedInt(-infinity)); 105 EXPECT_EQ(int_min, ToRoundedInt(min)); 106 EXPECT_EQ(int_min, ToRoundedInt(min - 100)); 107 } 108 109 } // namespace gfx 110
