/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License. */
#include <sstream>
#include <vector>

#include "gtest/gtest.h"
#include "paddle/framework/ddim.h"

TEST(DDim, Equality) {
  // construct a DDim from an initialization list
  paddle::framework::DDim ddim = paddle::framework::make_ddim({9, 1, 5});
  EXPECT_EQ(ddim[0], 9);
  EXPECT_EQ(ddim[1], 1);
  EXPECT_EQ(ddim[2], 5);

  // construct a DDim from a vector
  std::vector<int64_t> vec({9, 1, 5});
  paddle::framework::DDim vddim = paddle::framework::make_ddim(vec);
  EXPECT_EQ(ddim[0], 9);
  EXPECT_EQ(ddim[1], 1);
  EXPECT_EQ(ddim[2], 5);

  // mutate a DDim
  ddim[1] = 2;
  EXPECT_EQ(ddim[1], 2);
  paddle::framework::set(ddim, 0, 6);
  EXPECT_EQ(paddle::framework::get(ddim, 0), 6);

  // vectorize a DDim
  std::vector<int64_t> res_vec = paddle::framework::vectorize(vddim);
  EXPECT_EQ(res_vec[0], 9);
  EXPECT_EQ(res_vec[1], 1);
  EXPECT_EQ(res_vec[2], 5);
  paddle::framework::Dim<3> d(3, 2, 1);
  res_vec = paddle::framework::vectorize(paddle::framework::DDim(d));
  EXPECT_EQ(res_vec[0], 3);
  EXPECT_EQ(res_vec[1], 2);
  EXPECT_EQ(res_vec[2], 1);

  // add two DDims
  paddle::framework::DDim ddim_sum = ddim + vddim;
  EXPECT_EQ(ddim_sum[0], 15);
  EXPECT_EQ(ddim_sum[1], 3);
  EXPECT_EQ(ddim_sum[2], 10);

  // multiply two DDims
  paddle::framework::DDim ddim_mul = ddim * vddim;
  EXPECT_EQ(ddim_mul[0], 54);
  EXPECT_EQ(ddim_mul[1], 2);
  EXPECT_EQ(ddim_mul[2], 25);

  // arity of a DDim
  EXPECT_EQ(paddle::framework::arity(ddim), 3);
  EXPECT_EQ(ddim.size(), 3);

  // product of a DDim
  EXPECT_EQ(paddle::framework::product(vddim), 45);
  EXPECT_EQ(
      paddle::framework::product(paddle::framework::make_ddim({3, 2, 5, 3})),
      90);

  // slice a DDim
  paddle::framework::DDim ddim2 =
      paddle::framework::make_ddim({1, 2, 3, 4, 5, 6});
  paddle::framework::DDim ss = paddle::framework::slice_ddim(ddim2, 2, 5);
  EXPECT_EQ(arity(ss), 3);
  EXPECT_EQ(ss[0], 3);
  EXPECT_EQ(ss[1], 4);
  EXPECT_EQ(ss[2], 5);
  paddle::framework::DDim ss2 = paddle::framework::slice_ddim(ddim2, 0, 6);
  EXPECT_EQ(arity(ss2), 6);
  EXPECT_EQ(ss2[0], 1);
  EXPECT_EQ(ss2[1], 2);
  EXPECT_EQ(ss2[2], 3);
  EXPECT_EQ(ss2[3], 4);
  EXPECT_EQ(ss2[4], 5);
  EXPECT_EQ(ss2[5], 6);
}

TEST(DDim, Print) {
  // print a DDim
  std::stringstream ss;
  paddle::framework::DDim ddim = paddle::framework::make_ddim({2, 3, 4});
  ss << ddim;
  EXPECT_EQ("2, 3, 4", ss.str());
}