test_lmdb_rw.cc

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#include "../include/singa/io/reader.h"
#include "../include/singa/io/writer.h"
#include "gtest/gtest.h"
#ifdef USE_LMDB

const char* path_lmdb = "./test_lmdb";
using singa::io::LMDBReader;
using singa::io::LMDBWriter;
TEST(LMDBWriter, Create) {
  LMDBWriter writer;
  bool ret;
  ret = writer.Open(path_lmdb, singa::io::kCreate);
  EXPECT_EQ(true, ret);

  std::string key = "1";
  std::string value = "This is the first test for lmdb io.";
  ret = writer.Write(key, value);
  EXPECT_EQ(true, ret);

  key = "2";
  value = "This is the second test for lmdb io.";
  ret = writer.Write(key, value);
  EXPECT_EQ(true, ret);

  writer.Flush();
  writer.Close();
}

TEST(LMDBWriter, Append) {
  LMDBWriter writer;
  bool ret;
  ret = writer.Open(path_lmdb, singa::io::kAppend);
  EXPECT_EQ(true, ret);

  std::string key = "3";
  std::string value = "This is the third test for lmdb io.";
  ret = writer.Write(key, value);
  EXPECT_EQ(true, ret);

  key = "4";
  value = "This is the fourth test for lmdb io.";
  ret = writer.Write(key, value);
  EXPECT_EQ(true, ret);

  writer.Flush();
  writer.Close();
}

TEST(LMDBReader, Read) {
  LMDBReader reader;
  bool ret;
  ret = reader.Open(path_lmdb);
  EXPECT_EQ(true, ret);

  int cnt = reader.Count();
  EXPECT_EQ(4, cnt);

  std::string key, value;
  reader.Read(&key, &value);
  EXPECT_STREQ("1", key.c_str());
  EXPECT_STREQ("This is the first test for lmdb io.", value.c_str());

  reader.Read(&key, &value);
  EXPECT_STREQ("2", key.c_str());
  EXPECT_STREQ("This is the second test for lmdb io.", value.c_str());

  reader.Read(&key, &value);
  EXPECT_STREQ("3", key.c_str());
  EXPECT_STREQ("This is the third test for lmdb io.", value.c_str());

  reader.Read(&key, &value);
  EXPECT_STREQ("4", key.c_str());
  EXPECT_STREQ("This is the fourth test for lmdb io.", value.c_str());

  reader.Close();
}

TEST(LMDBReader, SeekToFirst) {
  LMDBReader reader;
  bool ret;
  ret = reader.Open(path_lmdb);
  EXPECT_EQ(true, ret);

  int cnt = reader.Count();
  EXPECT_EQ(4, cnt);

  std::string key, value;
  reader.Read(&key, &value);
  EXPECT_STREQ("1", key.c_str());
  EXPECT_STREQ("This is the first test for lmdb io.", value.c_str());

  reader.Read(&key, &value);
  EXPECT_STREQ("2", key.c_str());
  EXPECT_STREQ("This is the second test for lmdb io.", value.c_str());

  reader.SeekToFirst();
  reader.Read(&key, &value);
  EXPECT_STREQ("1", key.c_str());
  EXPECT_STREQ("This is the first test for lmdb io.", value.c_str());

  reader.Read(&key, &value);
  EXPECT_STREQ("2", key.c_str());
  EXPECT_STREQ("This is the second test for lmdb io.", value.c_str());

  reader.Read(&key, &value);
  EXPECT_STREQ("3", key.c_str());
  EXPECT_STREQ("This is the third test for lmdb io.", value.c_str());

  reader.Read(&key, &value);
  EXPECT_STREQ("4", key.c_str());
  EXPECT_STREQ("This is the fourth test for lmdb io.", value.c_str());

  reader.Close();

  remove("./test_lmdb/data.mdb");
  remove("./test_lmdb/lock.mdb");
  remove("./test_lmdb");
}
#endif  // USE_LMDB