Function TEST

src/leveldb/issues/issue320_test.cc:42–124

class Issue320 {};

TEST(Issue320, Test) {
  std::srand(0);

  bool delete_before_put = false;
  bool keep_snapshots = true;

  std::vector<std::unique_ptr<std::pair<std::string, std::string>>> test_map(
      10000);
  std::vector<Snapshot const*> snapshots(100, nullptr);

  DB* db;
  Options options;
  options.create_if_missing = true;

  std::string dbpath = test::TmpDir() + "/leveldb_issue320_test";
  ASSERT_OK(DB::Open(options, dbpath, &db));

  uint32_t target_size = 10000;
  uint32_t num_items = 0;
  uint32_t count = 0;
  std::string key;
  std::string value, old_value;

  WriteOptions writeOptions;
  ReadOptions readOptions;
  while (count < 200000) {
    if ((++count % 1000) == 0) {
      std::cout << "count: " << count << std::endl;
    }

    int index = GenerateRandomNumber(test_map.size());
    WriteBatch batch;

    if (test_map[index] == nullptr) {
      num_items++;
      test_map[index].reset(new std::pair<std::string, std::string>(
          CreateRandomString(index), CreateRandomString(index)));
      batch.Put(test_map[index]->first, test_map[index]->second);
    } else {
      ASSERT_OK(db->Get(readOptions, test_map[index]->first, &old_value));
      if (old_value != test_map[index]->second) {
        std::cout << "ERROR incorrect value returned by Get" << std::endl;
        std::cout << "  count=" << count << std::endl;
        std::cout << "  old value=" << old_value << std::endl;
        std::cout << "  test_map[index]->second=" << test_map[index]->second
                  << std::endl;
        std::cout << "  test_map[index]->first=" << test_map[index]->first
                  << std::endl;
        std::cout << "  index=" << index << std::endl;
        ASSERT_EQ(old_value, test_map[index]->second);
      }

      if (num_items >= target_size && GenerateRandomNumber(100) > 30) {
        batch.Delete(test_map[index]->first);
        test_map[index] = nullptr;
        --num_items;
      } else {
        test_map[index]->second = CreateRandomString(index);