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Issue 1611343002: wtf reformat test Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: pydent Created 4 years, 11 months ago
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1 /* 1 /*
2 * Copyright (c) 2012, Google Inc. All rights reserved. 2 * Copyright (c) 2012, Google Inc. All rights reserved.
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without 4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are 5 * modification, are permitted provided that the following conditions are
6 * met: 6 * met:
7 * 7 *
8 * * Redistributions of source code must retain the above copyright 8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer. 9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above 10 * * Redistributions in binary form must reproduce the above
(...skipping 17 matching lines...) Expand all
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */ 29 */
30 30
31 #include "wtf/SaturatedArithmetic.h" 31 #include "wtf/SaturatedArithmetic.h"
32 32
33 #include "testing/gtest/include/gtest/gtest.h" 33 #include "testing/gtest/include/gtest/gtest.h"
34 #include <limits.h> 34 #include <limits.h>
35 35
36 namespace WTF { 36 namespace WTF {
37 37
38 TEST(SaturatedArithmeticTest, Addition) 38 TEST(SaturatedArithmeticTest, Addition) {
39 { 39 EXPECT_EQ(0, saturatedAddition(0, 0));
40 EXPECT_EQ(0, saturatedAddition(0, 0)); 40 EXPECT_EQ(1, saturatedAddition(0, 1));
41 EXPECT_EQ(1, saturatedAddition(0, 1)); 41 EXPECT_EQ(100, saturatedAddition(0, 100));
42 EXPECT_EQ(100, saturatedAddition(0, 100)); 42 EXPECT_EQ(150, saturatedAddition(100, 50));
43 EXPECT_EQ(150, saturatedAddition(100, 50));
44 43
45 EXPECT_EQ(-1, saturatedAddition(0, -1)); 44 EXPECT_EQ(-1, saturatedAddition(0, -1));
46 EXPECT_EQ(0, saturatedAddition(1, -1)); 45 EXPECT_EQ(0, saturatedAddition(1, -1));
47 EXPECT_EQ(50, saturatedAddition(100, -50)); 46 EXPECT_EQ(50, saturatedAddition(100, -50));
48 EXPECT_EQ(-50, saturatedAddition(50, -100)); 47 EXPECT_EQ(-50, saturatedAddition(50, -100));
49 48
50 EXPECT_EQ(INT_MAX - 1, saturatedAddition(INT_MAX - 1, 0)); 49 EXPECT_EQ(INT_MAX - 1, saturatedAddition(INT_MAX - 1, 0));
51 EXPECT_EQ(INT_MAX, saturatedAddition(INT_MAX - 1, 1)); 50 EXPECT_EQ(INT_MAX, saturatedAddition(INT_MAX - 1, 1));
52 EXPECT_EQ(INT_MAX, saturatedAddition(INT_MAX - 1, 2)); 51 EXPECT_EQ(INT_MAX, saturatedAddition(INT_MAX - 1, 2));
53 EXPECT_EQ(INT_MAX - 1, saturatedAddition(0, INT_MAX - 1)); 52 EXPECT_EQ(INT_MAX - 1, saturatedAddition(0, INT_MAX - 1));
54 EXPECT_EQ(INT_MAX, saturatedAddition(1, INT_MAX - 1)); 53 EXPECT_EQ(INT_MAX, saturatedAddition(1, INT_MAX - 1));
55 EXPECT_EQ(INT_MAX, saturatedAddition(2, INT_MAX - 1)); 54 EXPECT_EQ(INT_MAX, saturatedAddition(2, INT_MAX - 1));
56 EXPECT_EQ(INT_MAX, saturatedAddition(INT_MAX - 1, INT_MAX - 1)); 55 EXPECT_EQ(INT_MAX, saturatedAddition(INT_MAX - 1, INT_MAX - 1));
57 EXPECT_EQ(INT_MAX, saturatedAddition(INT_MAX, INT_MAX)); 56 EXPECT_EQ(INT_MAX, saturatedAddition(INT_MAX, INT_MAX));
58 57
59 EXPECT_EQ(INT_MIN, saturatedAddition(INT_MIN, 0)); 58 EXPECT_EQ(INT_MIN, saturatedAddition(INT_MIN, 0));
60 EXPECT_EQ(INT_MIN + 1, saturatedAddition(INT_MIN + 1, 0)); 59 EXPECT_EQ(INT_MIN + 1, saturatedAddition(INT_MIN + 1, 0));
61 EXPECT_EQ(INT_MIN + 2, saturatedAddition(INT_MIN + 1, 1)); 60 EXPECT_EQ(INT_MIN + 2, saturatedAddition(INT_MIN + 1, 1));
62 EXPECT_EQ(INT_MIN + 3, saturatedAddition(INT_MIN + 1, 2)); 61 EXPECT_EQ(INT_MIN + 3, saturatedAddition(INT_MIN + 1, 2));
63 EXPECT_EQ(INT_MIN, saturatedAddition(INT_MIN + 1, -1)); 62 EXPECT_EQ(INT_MIN, saturatedAddition(INT_MIN + 1, -1));
64 EXPECT_EQ(INT_MIN, saturatedAddition(INT_MIN + 1, -2)); 63 EXPECT_EQ(INT_MIN, saturatedAddition(INT_MIN + 1, -2));
65 EXPECT_EQ(INT_MIN + 1, saturatedAddition(0, INT_MIN + 1)); 64 EXPECT_EQ(INT_MIN + 1, saturatedAddition(0, INT_MIN + 1));
66 EXPECT_EQ(INT_MIN, saturatedAddition(-1, INT_MIN + 1)); 65 EXPECT_EQ(INT_MIN, saturatedAddition(-1, INT_MIN + 1));
67 EXPECT_EQ(INT_MIN, saturatedAddition(-2, INT_MIN + 1)); 66 EXPECT_EQ(INT_MIN, saturatedAddition(-2, INT_MIN + 1));
68 67
69 EXPECT_EQ(INT_MAX / 2 + 10000, saturatedAddition(INT_MAX / 2, 10000)); 68 EXPECT_EQ(INT_MAX / 2 + 10000, saturatedAddition(INT_MAX / 2, 10000));
70 EXPECT_EQ(INT_MAX, saturatedAddition(INT_MAX / 2 + 1, INT_MAX / 2 + 1)); 69 EXPECT_EQ(INT_MAX, saturatedAddition(INT_MAX / 2 + 1, INT_MAX / 2 + 1));
71 EXPECT_EQ(-1, saturatedAddition(INT_MIN, INT_MAX)); 70 EXPECT_EQ(-1, saturatedAddition(INT_MIN, INT_MAX));
72 } 71 }
73 72
74 TEST(SaturatedArithmeticTest, Subtraction) 73 TEST(SaturatedArithmeticTest, Subtraction) {
75 { 74 EXPECT_EQ(0, saturatedSubtraction(0, 0));
76 EXPECT_EQ(0, saturatedSubtraction(0, 0)); 75 EXPECT_EQ(-1, saturatedSubtraction(0, 1));
77 EXPECT_EQ(-1, saturatedSubtraction(0, 1)); 76 EXPECT_EQ(-100, saturatedSubtraction(0, 100));
78 EXPECT_EQ(-100, saturatedSubtraction(0, 100)); 77 EXPECT_EQ(50, saturatedSubtraction(100, 50));
79 EXPECT_EQ(50, saturatedSubtraction(100, 50));
80 78
81 EXPECT_EQ(1, saturatedSubtraction(0, -1)); 79 EXPECT_EQ(1, saturatedSubtraction(0, -1));
82 EXPECT_EQ(2, saturatedSubtraction(1, -1)); 80 EXPECT_EQ(2, saturatedSubtraction(1, -1));
83 EXPECT_EQ(150, saturatedSubtraction(100, -50)); 81 EXPECT_EQ(150, saturatedSubtraction(100, -50));
84 EXPECT_EQ(150, saturatedSubtraction(50, -100)); 82 EXPECT_EQ(150, saturatedSubtraction(50, -100));
85 83
86 EXPECT_EQ(INT_MAX, saturatedSubtraction(INT_MAX, 0)); 84 EXPECT_EQ(INT_MAX, saturatedSubtraction(INT_MAX, 0));
87 EXPECT_EQ(INT_MAX - 1, saturatedSubtraction(INT_MAX, 1)); 85 EXPECT_EQ(INT_MAX - 1, saturatedSubtraction(INT_MAX, 1));
88 EXPECT_EQ(INT_MAX - 1, saturatedSubtraction(INT_MAX - 1, 0)); 86 EXPECT_EQ(INT_MAX - 1, saturatedSubtraction(INT_MAX - 1, 0));
89 EXPECT_EQ(INT_MAX, saturatedSubtraction(INT_MAX - 1, -1)); 87 EXPECT_EQ(INT_MAX, saturatedSubtraction(INT_MAX - 1, -1));
90 EXPECT_EQ(INT_MAX, saturatedSubtraction(INT_MAX - 1, -2)); 88 EXPECT_EQ(INT_MAX, saturatedSubtraction(INT_MAX - 1, -2));
91 EXPECT_EQ(-INT_MAX + 1, saturatedSubtraction(0, INT_MAX - 1)); 89 EXPECT_EQ(-INT_MAX + 1, saturatedSubtraction(0, INT_MAX - 1));
92 EXPECT_EQ(-INT_MAX, saturatedSubtraction(-1, INT_MAX - 1)); 90 EXPECT_EQ(-INT_MAX, saturatedSubtraction(-1, INT_MAX - 1));
93 EXPECT_EQ(-INT_MAX - 1, saturatedSubtraction(-2, INT_MAX - 1)); 91 EXPECT_EQ(-INT_MAX - 1, saturatedSubtraction(-2, INT_MAX - 1));
94 EXPECT_EQ(-INT_MAX - 1, saturatedSubtraction(-3, INT_MAX - 1)); 92 EXPECT_EQ(-INT_MAX - 1, saturatedSubtraction(-3, INT_MAX - 1));
95 93
96 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN, 0)); 94 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN, 0));
97 EXPECT_EQ(INT_MIN + 1, saturatedSubtraction(INT_MIN + 1, 0)); 95 EXPECT_EQ(INT_MIN + 1, saturatedSubtraction(INT_MIN + 1, 0));
98 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN + 1, 1)); 96 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN + 1, 1));
99 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN + 1, 2)); 97 EXPECT_EQ(INT_MIN, saturatedSubtraction(INT_MIN + 1, 2));
100 98
101 EXPECT_EQ(0, saturatedSubtraction(INT_MIN, INT_MIN)); 99 EXPECT_EQ(0, saturatedSubtraction(INT_MIN, INT_MIN));
102 EXPECT_EQ(0, saturatedSubtraction(INT_MAX, INT_MAX)); 100 EXPECT_EQ(0, saturatedSubtraction(INT_MAX, INT_MAX));
103 EXPECT_EQ(INT_MAX, saturatedSubtraction(INT_MAX, INT_MIN)); 101 EXPECT_EQ(INT_MAX, saturatedSubtraction(INT_MAX, INT_MIN));
104 } 102 }
105 103
106 TEST(SaturatedArithmeticTest, SetSigned) 104 TEST(SaturatedArithmeticTest, SetSigned) {
107 { 105 const int kFractionBits = 6;
108 const int kFractionBits = 6; 106 const int intMaxForLayoutUnit = INT_MAX >> kFractionBits;
109 const int intMaxForLayoutUnit = INT_MAX >> kFractionBits; 107 const int intMinForLayoutUnit = INT_MIN >> kFractionBits;
110 const int intMinForLayoutUnit = INT_MIN >> kFractionBits;
111 108
112 EXPECT_EQ(0, saturatedSet<kFractionBits>(0)); 109 EXPECT_EQ(0, saturatedSet<kFractionBits>(0));
113 110
114 // Internally the max number we can represent (without saturating) 111 // Internally the max number we can represent (without saturating)
115 // is all the (non-sign) bits set except for the bottom n fraction bits 112 // is all the (non-sign) bits set except for the bottom n fraction bits
116 const int maxInternalRepresentation = INT_MAX ^ ((1 << kFractionBits)-1); 113 const int maxInternalRepresentation = INT_MAX ^ ((1 << kFractionBits) - 1);
117 EXPECT_EQ(maxInternalRepresentation, 114 EXPECT_EQ(maxInternalRepresentation,
118 saturatedSet<kFractionBits>(intMaxForLayoutUnit)); 115 saturatedSet<kFractionBits>(intMaxForLayoutUnit));
119 116
120 EXPECT_EQ(getMaxSaturatedSetResultForTesting(kFractionBits), 117 EXPECT_EQ(getMaxSaturatedSetResultForTesting(kFractionBits),
121 saturatedSet<kFractionBits>(intMaxForLayoutUnit + 100)); 118 saturatedSet<kFractionBits>(intMaxForLayoutUnit + 100));
122 119
123 EXPECT_EQ((intMaxForLayoutUnit - 100) << kFractionBits, 120 EXPECT_EQ((intMaxForLayoutUnit - 100) << kFractionBits,
124 saturatedSet<kFractionBits>(intMaxForLayoutUnit - 100)); 121 saturatedSet<kFractionBits>(intMaxForLayoutUnit - 100));
125 122
126 EXPECT_EQ(getMinSaturatedSetResultForTesting(kFractionBits), 123 EXPECT_EQ(getMinSaturatedSetResultForTesting(kFractionBits),
127 saturatedSet<kFractionBits>(intMinForLayoutUnit)); 124 saturatedSet<kFractionBits>(intMinForLayoutUnit));
128 125
129 EXPECT_EQ(getMinSaturatedSetResultForTesting(kFractionBits), 126 EXPECT_EQ(getMinSaturatedSetResultForTesting(kFractionBits),
130 saturatedSet<kFractionBits>(intMinForLayoutUnit - 100)); 127 saturatedSet<kFractionBits>(intMinForLayoutUnit - 100));
131 128
132 // Shifting negative numbers left has undefined behavior, so use 129 // Shifting negative numbers left has undefined behavior, so use
133 // multiplication instead of direct shifting here. 130 // multiplication instead of direct shifting here.
134 EXPECT_EQ((intMinForLayoutUnit + 100) * (1 << kFractionBits), 131 EXPECT_EQ((intMinForLayoutUnit + 100) * (1 << kFractionBits),
135 saturatedSet<kFractionBits>(intMinForLayoutUnit + 100)); 132 saturatedSet<kFractionBits>(intMinForLayoutUnit + 100));
136 } 133 }
137 134
138 TEST(SaturatedArithmeticTest, SetUnsigned) 135 TEST(SaturatedArithmeticTest, SetUnsigned) {
139 { 136 const int kFractionBits = 6;
140 const int kFractionBits = 6; 137 const int intMaxForLayoutUnit = INT_MAX >> kFractionBits;
141 const int intMaxForLayoutUnit = INT_MAX >> kFractionBits;
142 138
143 EXPECT_EQ(0, saturatedSet<kFractionBits>((unsigned)0)); 139 EXPECT_EQ(0, saturatedSet<kFractionBits>((unsigned)0));
144 140
145 EXPECT_EQ(getMaxSaturatedSetResultForTesting(kFractionBits), 141 EXPECT_EQ(getMaxSaturatedSetResultForTesting(kFractionBits),
146 saturatedSet<kFractionBits>((unsigned)intMaxForLayoutUnit)); 142 saturatedSet<kFractionBits>((unsigned)intMaxForLayoutUnit));
147 143
148 const unsigned kOverflowed = intMaxForLayoutUnit + 100; 144 const unsigned kOverflowed = intMaxForLayoutUnit + 100;
149 EXPECT_EQ(getMaxSaturatedSetResultForTesting(kFractionBits), 145 EXPECT_EQ(getMaxSaturatedSetResultForTesting(kFractionBits),
150 saturatedSet<kFractionBits>(kOverflowed)); 146 saturatedSet<kFractionBits>(kOverflowed));
151 147
152 const unsigned kNotOverflowed = intMaxForLayoutUnit - 100; 148 const unsigned kNotOverflowed = intMaxForLayoutUnit - 100;
153 EXPECT_EQ((intMaxForLayoutUnit - 100) << kFractionBits, 149 EXPECT_EQ((intMaxForLayoutUnit - 100) << kFractionBits,
154 saturatedSet<kFractionBits>(kNotOverflowed)); 150 saturatedSet<kFractionBits>(kNotOverflowed));
155 } 151 }
156 152
157 } // namespace WTF 153 } // namespace WTF
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