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1 // Copyright 2014 the V8 project 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 <climits> | |
6 | |
7 #include "src/base/utils/random-number-generator.h" | |
8 #include "testing/gtest/include/gtest/gtest.h" | |
9 | |
10 namespace v8 { | |
11 namespace base { | |
12 | |
13 class RandomNumberGeneratorTest : public ::testing::TestWithParam<int> {}; | |
14 | |
15 | |
16 static const int kMaxRuns = 12345; | |
17 | |
18 | |
19 TEST_P(RandomNumberGeneratorTest, NextIntWithMaxValue) { | |
20 RandomNumberGenerator rng(GetParam()); | |
21 for (int max = 1; max <= kMaxRuns; ++max) { | |
22 int n = rng.NextInt(max); | |
23 EXPECT_LE(0, n); | |
24 EXPECT_LT(n, max); | |
25 } | |
26 } | |
27 | |
28 | |
29 TEST_P(RandomNumberGeneratorTest, NextBooleanReturnsFalseOrTrue) { | |
30 RandomNumberGenerator rng(GetParam()); | |
31 for (int k = 0; k < kMaxRuns; ++k) { | |
32 bool b = rng.NextBool(); | |
33 EXPECT_TRUE(b == false || b == true); | |
34 } | |
35 } | |
36 | |
37 | |
38 TEST_P(RandomNumberGeneratorTest, NextDoubleReturnsValueBetween0And1) { | |
39 RandomNumberGenerator rng(GetParam()); | |
40 for (int k = 0; k < kMaxRuns; ++k) { | |
41 double d = rng.NextDouble(); | |
42 EXPECT_LE(0.0, d); | |
43 EXPECT_LT(d, 1.0); | |
44 } | |
45 } | |
46 | |
47 | |
48 INSTANTIATE_TEST_CASE_P(RandomSeeds, RandomNumberGeneratorTest, | |
49 ::testing::Values(INT_MIN, -1, 0, 1, 42, 100, | |
50 1234567890, 987654321, INT_MAX)); | |
51 | |
52 } // namespace base | |
53 } // namespace v8 | |
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