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| 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/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 | |
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