v8/test/cctest/test-symbols.cc

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// Check that we can traverse very deep stacks of ConsStrings using
// StringCharacterStram.  Check that Get(int) works on very deep stacks
// of ConsStrings.  These operations may not be very fast, but they
// should be possible without getting errors due to too deep recursion.

#include "src/execution/isolate.h"
#include "src/heap/factory.h"
#include "src/objects/name-inl.h"
#include "src/utils/ostreams.h"
#include "src/objects/objects.h"
#include "test/cctest/cctest.h"

namespace v8 {
namespace internal {

TEST(Create) {
  CcTest::InitializeVM();
  Isolate* isolate = CcTest::i_isolate();
  HandleScope scope(isolate);

  const int kNumSymbols = 30;
  Handle<Symbol> symbols[kNumSymbols];

  StdoutStream os;
  for (int i = 0; i < kNumSymbols; ++i) {
    symbols[i] = isolate->factory()->NewSymbol();
    CHECK(symbols[i]->IsName());
    CHECK(symbols[i]->IsSymbol());
    CHECK(symbols[i]->HasHashCode());
    CHECK_GT(symbols[i]->Hash(), 0u);
    os << Brief(*symbols[i]) << "\n";
#if OBJECT_PRINT
    symbols[i]->Print(os);
#endif
#if VERIFY_HEAP
    symbols[i]->ObjectVerify(isolate);
#endif
  }

  CcTest::CollectGarbage(i::NEW_SPACE);
  CcTest::CollectAllGarbage();

  // All symbols should be distinct.
  for (int i = 0; i < kNumSymbols; ++i) {
    CHECK(symbols[i]->SameValue(*symbols[i]));
    for (int j = i + 1; j < kNumSymbols; ++j) {
      CHECK(!symbols[i]->SameValue(*symbols[j]));
    }
  }
}

}  // namespace internal
}  // namespace v8