v8/test/cctest/test-random-number-generator.cc

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#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 int64_t kRandomSeeds[] = {-1, 1, 42, 100, 1234567890, 987654321};


TEST(RandomSeedFlagIsUsed) {
  for (unsigned n = 0; n < arraysize(kRandomSeeds); ++n) {
    FLAG_random_seed = static_cast<int>(kRandomSeeds[n]);
    v8::Isolate* i = v8::Isolate::New();
    v8::base::RandomNumberGenerator& rng =
        *reinterpret_cast<Isolate*>(i)->random_number_generator();
    CHECK_EQ(kRandomSeeds[n], rng.initial_seed());
    i->Dispose();
  }
}