| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <climits> |
| |
| #include "src/base/utils/random-number-generator.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace v8 { |
| namespace base { |
| |
| class RandomNumberGeneratorTest : public ::testing::TestWithParam<int> {}; |
| |
| |
| static const int kMaxRuns = 12345; |
| |
| |
| TEST_P(RandomNumberGeneratorTest, NextIntWithMaxValue) { |
| RandomNumberGenerator rng(GetParam()); |
| for (int max = 1; max <= kMaxRuns; ++max) { |
| int n = rng.NextInt(max); |
| EXPECT_LE(0, n); |
| EXPECT_LT(n, max); |
| } |
| } |
| |
| |
| TEST_P(RandomNumberGeneratorTest, NextBooleanReturnsFalseOrTrue) { |
| RandomNumberGenerator rng(GetParam()); |
| for (int k = 0; k < kMaxRuns; ++k) { |
| bool b = rng.NextBool(); |
| EXPECT_TRUE(b == false || b == true); |
| } |
| } |
| |
| |
| TEST_P(RandomNumberGeneratorTest, NextDoubleReturnsValueBetween0And1) { |
| RandomNumberGenerator rng(GetParam()); |
| for (int k = 0; k < kMaxRuns; ++k) { |
| double d = rng.NextDouble(); |
| EXPECT_LE(0.0, d); |
| EXPECT_LT(d, 1.0); |
| } |
| } |
| |
| |
| INSTANTIATE_TEST_CASE_P(RandomSeeds, RandomNumberGeneratorTest, |
| ::testing::Values(INT_MIN, -1, 0, 1, 42, 100, |
| 1234567890, 987654321, INT_MAX)); |
| |
| } // namespace base |
| } // namespace v8 |