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#include "session/generic_storage_manager.h"

#include "base/file_util.h"
#include "base/util.h"
#include "testing/base/public/gunit.h"

DECLARE_string(test_tmpdir);

namespace {

static const string GetTemporaryFilePath() {
  return mozc::FileUtil::JoinPath(FLAGS_test_tmpdir,
                                  "generic_storage_test.db");
}

}  // namespace

namespace mozc {

TEST(GenericStorageManagerFactoryTest, GetStorage) {
  GenericStorageInterface *symbol =
      GenericStorageManagerFactory::GetStorage(
          commands::GenericStorageEntry::SYMBOL_HISTORY);
  GenericStorageInterface *emoticon =
      GenericStorageManagerFactory::GetStorage(
          commands::GenericStorageEntry::EMOTICON_HISTORY);
  GenericStorageInterface *invalid =
      GenericStorageManagerFactory::GetStorage(
          (commands::GenericStorageEntry::StorageType)(100));

  EXPECT_NE(nullptr, symbol);
  EXPECT_NE(nullptr, emoticon);
  EXPECT_EQ(nullptr, invalid);
  EXPECT_NE(symbol, emoticon);
}

// Checks the basic operations of LRU.
// Detailed test is omitted because storage/lru_storage_test.cc does.
TEST(GenericLruStorageTest, BasicOperations) {
  const int kValueSize = 12;
  const int kSize = 10;
  const string kPrinfFormat = Util::StringPrintf("%%%dlu", kValueSize);

  GenericLruStorage storage(
      GetTemporaryFilePath().data(), kValueSize, kSize, 123);
  // Inserts (kSize + 1) entries.
  for (size_t i = 0; i < kSize + 1; ++i) {
    const string value = Util::StringPrintf(kPrinfFormat.data(), i);
    const string key = string("key") + value;
    storage.Insert(key, value.data());
    // Check the existence.
    EXPECT_EQ(value, string(storage.Lookup(key), kValueSize));
  }

  // First inserted entry is already pushed out.
  EXPECT_EQ(NULL, storage.Lookup("0"));
  for (size_t i = 1; i < kSize + 1; ++i) {
    const string value = Util::StringPrintf(kPrinfFormat.data(), i);
    const string key = string("key") + value;
    EXPECT_EQ(value, string(storage.Lookup(key), kValueSize));
  }

  // Check the list.
  vector<string> values;
  storage.GetAllValues(&values);
  EXPECT_EQ(kSize, values.size());
  for (size_t i = 1; i < kSize + 1; ++i) {
    EXPECT_EQ(Util::StringPrintf(kPrinfFormat.data(), i),
              values.at(kSize - i));
  }

  // Clean
  storage.Clear();
  storage.GetAllValues(&values);
  EXPECT_TRUE(values.empty());
}

}  // namespace mozc