/**
 * Copyright (c) 2021 OceanBase
 * OceanBase CE is licensed under Mulan PubL v2.
 * You can use this software according to the terms and conditions of the Mulan PubL v2.
 * You may obtain a copy of Mulan PubL v2 at:
 *          http://license.coscl.org.cn/MulanPubL-2.0
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PubL v2 for more details.
 */

#define private public
#include "lib/hash/ob_hashset.h"
#undef private

#include "gtest/gtest.h"

using namespace oceanbase;
using namespace common;
using namespace hash;

class TestHashUtils: public ::testing::Test
{
public:
  virtual void SetUp() {}
  virtual void TearDown() {}
};

struct MySimpleAllocer
{
public:
  explicit MySimpleAllocer()
  {
    alloc_cnt_ = 0;
    free_cnt_ = 0;
  }
  void *alloc(const int64_t sz)
  {
    alloc_cnt_++;
    return ob_malloc(sz, attr_);
  }
  void free(void *p)
  {
    free_cnt_++;
    ob_free(p);
  }
  void set_attr(const ObMemAttr &attr) { attr_ = attr; }
  void set_label(const lib::ObLabel &label) { attr_.label_ = label; }
  int64_t alloc_cnt_;
  int64_t free_cnt_;
  ObMemAttr attr_;
};

TEST_F(TestHashUtils, Basic)
{
  static constexpr int NODE_NUM = 2;
  using TestAlloc = hash::SimpleAllocer<int, NODE_NUM, SpinMutexDefendMode, MySimpleAllocer>;
  TestAlloc alloc;
  int *obj = alloc.alloc();
  ASSERT_TRUE(obj != NULL);
  int *obj2 = alloc.alloc();
  ASSERT_TRUE(obj2 != NULL);
  alloc.free(obj2);
  int *obj3 = alloc.alloc();
  ASSERT_EQ(obj3, obj2);
  alloc.free(obj3);
  int *obj4 = alloc.alloc();
  ASSERT_EQ(obj4, obj3);
  alloc.free(obj);
  alloc.free(obj4);
  ASSERT_EQ(0, alloc.allocer_.alloc_cnt_ - alloc.allocer_.free_cnt_);
}

TEST_F(TestHashUtils, test_SimpleAllocer_reserve)
{
  static constexpr int NODE_NUM = 2;
  using TestAlloc = hash::SimpleAllocer<int, NODE_NUM, SpinMutexDefendMode, MySimpleAllocer>;
  TestAlloc alloc;
  ASSERT_EQ(alloc.get_nblocks(), 0);
  ASSERT_EQ(alloc.reserve(0), OB_SUCCESS);
  ASSERT_EQ(alloc.get_nblocks(), 0);
  ASSERT_EQ(0, alloc.allocer_.alloc_cnt_);
  ASSERT_EQ(alloc.reserve(2), OB_SUCCESS);
  ASSERT_EQ(alloc.get_nblocks(), 1);
  ASSERT_EQ(1, alloc.allocer_.alloc_cnt_);
  ASSERT_EQ(alloc.reserve(4), OB_SUCCESS);
  ASSERT_EQ(alloc.get_nblocks(), 2);
  ASSERT_EQ(2, alloc.allocer_.alloc_cnt_);
  ASSERT_EQ(alloc.reserve(2), OB_SUCCESS);
  ASSERT_EQ(alloc.get_nblocks(), 1);
  ASSERT_EQ(1, alloc.allocer_.free_cnt_);
  ASSERT_GT(alloc.allocer_.alloc_cnt_, alloc.allocer_.free_cnt_);
  alloc.~TestAlloc();
  ASSERT_EQ(alloc.allocer_.alloc_cnt_, alloc.allocer_.free_cnt_);
}

int main(int argc, char **argv)
{
  oceanbase::common::ObLogger::get_logger().set_log_level("INFO");
  OB_LOGGER.set_log_level("INFO");
  testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}