third_party/v8/test/cctest/test-bit-vector.cc

// Copyright 2012 the V8 project authors. All rights reserved.
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#include <stdlib.h>

#include "src/init/v8.h"

#include "src/utils/bit-vector.h"
#include "test/cctest/cctest.h"

namespace v8 {
namespace internal {

TEST(BitVector) {
  v8::internal::AccountingAllocator allocator;
  Zone zone(&allocator, ZONE_NAME);
  {
    BitVector v(15, &zone);
    v.Add(1);
    CHECK(v.Contains(1));
    v.Remove(0);
    CHECK(!v.Contains(0));
    v.Add(0);
    v.Add(1);
    BitVector w(15, &zone);
    w.Add(1);
    v.Intersect(w);
    CHECK(!v.Contains(0));
    CHECK(v.Contains(1));
  }

  {
    BitVector v(64, &zone);
    v.Add(27);
    v.Add(30);
    v.Add(31);
    v.Add(33);
    BitVector::Iterator iter(&v);
    CHECK_EQ(27, iter.Current());
    iter.Advance();
    CHECK_EQ(30, iter.Current());
    iter.Advance();
    CHECK_EQ(31, iter.Current());
    iter.Advance();
    CHECK_EQ(33, iter.Current());
    iter.Advance();
    CHECK(iter.Done());
  }

  {
    BitVector v(15, &zone);
    v.Add(0);
    BitVector w(15, &zone);
    w.Add(1);
    v.Union(w);
    CHECK(v.Contains(0));
    CHECK(v.Contains(1));
  }

  {
    BitVector v(15, &zone);
    v.Add(0);
    BitVector w(15, &zone);
    w.CopyFrom(v);
    CHECK(w.Contains(0));
    w.Add(1);
    BitVector u(w, &zone);
    CHECK(u.Contains(0));
    CHECK(u.Contains(1));
    v.Union(w);
    CHECK(v.Contains(0));
    CHECK(v.Contains(1));
  }

  {
    BitVector v(35, &zone);
    v.Add(0);
    BitVector w(35, &zone);
    w.Add(33);
    v.Union(w);
    CHECK(v.Contains(0));
    CHECK(v.Contains(33));
  }

  {
    BitVector v(35, &zone);
    v.Add(32);
    v.Add(33);
    BitVector w(35, &zone);
    w.Add(33);
    v.Intersect(w);
    CHECK(!v.Contains(32));
    CHECK(v.Contains(33));
    BitVector r(35, &zone);
    r.CopyFrom(v);
    CHECK(!r.Contains(32));
    CHECK(r.Contains(33));
  }

  {
    BitVector v(35, &zone);
    v.Add(32);
    v.Add(33);
    CHECK(v.Contains(32));
    CHECK(v.Contains(33));
    CHECK(!v.Contains(22));
    CHECK(!v.Contains(34));
    v.Resize(50, &zone);
    CHECK(v.Contains(32));
    CHECK(v.Contains(33));
    CHECK(!v.Contains(22));
    CHECK(!v.Contains(34));
    CHECK(!v.Contains(43));
    v.Resize(300, &zone);
    CHECK(v.Contains(32));
    CHECK(v.Contains(33));
    CHECK(!v.Contains(22));
    CHECK(!v.Contains(34));
    CHECK(!v.Contains(43));
    CHECK(!v.Contains(243));
  }
}

}  // namespace internal
}  // namespace v8