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// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "src/v8.h"
#include "test/cctest/cctest.h"
#include "src/base/utils/random-number-generator.h"
#include "src/isolate-inl.h"
using namespace v8::internal;
static const int kMaxRuns = 12345;
static const int kRandomSeeds[] = {
-1, 1, 42, 100, 1234567890, 987654321
};
TEST(RandomSeedFlagIsUsed) {
for (unsigned n = 0; n < ARRAY_SIZE(kRandomSeeds); ++n) {
FLAG_random_seed = kRandomSeeds[n];
v8::Isolate* i = v8::Isolate::New();
v8::base::RandomNumberGenerator& rng1 =
*reinterpret_cast<Isolate*>(i)->random_number_generator();
v8::base::RandomNumberGenerator rng2(kRandomSeeds[n]);
for (int k = 1; k <= kMaxRuns; ++k) {
int64_t i1, i2;
rng1.NextBytes(&i1, sizeof(i1));
rng2.NextBytes(&i2, sizeof(i2));
CHECK_EQ(i2, i1);
CHECK_EQ(rng2.NextInt(), rng1.NextInt());
CHECK_EQ(rng2.NextInt(k), rng1.NextInt(k));
CHECK_EQ(rng2.NextDouble(), rng1.NextDouble());
}
i->Dispose();
}
}
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