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Diffstat (limited to 'deps/v8/src/base/utils/random-number-generator-unittest.cc')
-rw-r--r-- | deps/v8/src/base/utils/random-number-generator-unittest.cc | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/deps/v8/src/base/utils/random-number-generator-unittest.cc b/deps/v8/src/base/utils/random-number-generator-unittest.cc new file mode 100644 index 0000000000..7c533db4f0 --- /dev/null +++ b/deps/v8/src/base/utils/random-number-generator-unittest.cc @@ -0,0 +1,53 @@ +// 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 |