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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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