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