1b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Copyright 2014 the V8 project authors. All rights reserved. 2b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Use of this source code is governed by a BSD-style license that can be 3b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// found in the LICENSE file. 4b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 5b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include <climits> 6b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 7b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/base/utils/random-number-generator.h" 8b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "testing/gtest/include/gtest/gtest.h" 9b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 10b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochnamespace v8 { 11b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochnamespace base { 12b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 13b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass RandomNumberGeneratorTest : public ::testing::TestWithParam<int> {}; 14b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 15b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 16b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochstatic const int kMaxRuns = 12345; 17b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 18b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 19b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochTEST_P(RandomNumberGeneratorTest, NextIntWithMaxValue) { 20b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RandomNumberGenerator rng(GetParam()); 21b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int max = 1; max <= kMaxRuns; ++max) { 22b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int n = rng.NextInt(max); 23b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch EXPECT_LE(0, n); 24b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch EXPECT_LT(n, max); 25b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 26b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 27b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 28b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 29b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochTEST_P(RandomNumberGeneratorTest, NextBooleanReturnsFalseOrTrue) { 30b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RandomNumberGenerator rng(GetParam()); 31b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int k = 0; k < kMaxRuns; ++k) { 32b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool b = rng.NextBool(); 33b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch EXPECT_TRUE(b == false || b == true); 34b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 35b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 36b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 37b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 38b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochTEST_P(RandomNumberGeneratorTest, NextDoubleReturnsValueBetween0And1) { 39b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RandomNumberGenerator rng(GetParam()); 40b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int k = 0; k < kMaxRuns; ++k) { 41b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double d = rng.NextDouble(); 42b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch EXPECT_LE(0.0, d); 43b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch EXPECT_LT(d, 1.0); 44b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 45b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 46b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 47b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 48b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochINSTANTIATE_TEST_CASE_P(RandomSeeds, RandomNumberGeneratorTest, 49b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ::testing::Values(INT_MIN, -1, 0, 1, 42, 100, 50b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1234567890, 987654321, INT_MAX)); 51b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 52b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} // namespace base 53b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} // namespace v8 54