/* Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#include <gtest/gtest.h>
#include <algorithm>

#include "sql/sql_array.h"

namespace bounds_check_array_unittest {

typedef Bounds_checked_array<int> Int_array;

class BoundsCheckedArray : public ::testing::Test {
 public:
  BoundsCheckedArray() : some_integer(0) {}

  virtual void SetUp() {
    for (int ix = 0; ix < c_array_size; ++ix) c_array[ix] = ix;
  }

  static const int c_array_size = 5;
  int c_array[c_array_size];

  int some_integer;
  Int_array int_array;
};

}  // namespace bounds_check_array_unittest

/*
  operator<<() is needed by the EXPECT macros.
  It is a template argument, so static rather than in unnamed namespace.
 */
static inline std::ostream &operator<<(
    std::ostream &s, const bounds_check_array_unittest::Int_array &v) {
  return s << "{" << v.array() << ", " << v.size() << "}";
}

namespace bounds_check_array_unittest {

TEST_F(BoundsCheckedArray, Empty) {
  EXPECT_EQ(sizeof(int), int_array.element_size());
  EXPECT_EQ(0U, int_array.size());
  EXPECT_TRUE(int_array.is_null());
  int *pi = NULL;
  EXPECT_EQ(pi, int_array.array());
}

#if !defined(DBUG_OFF)

// Google Test recommends DeathTest suffix for classes used in death tests.
typedef BoundsCheckedArray BoundsCheckedArrayDeathTest;

TEST_F(BoundsCheckedArrayDeathTest, BoundsCheckRead) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  int_array = Int_array(c_array, 2);
  EXPECT_DEATH_IF_SUPPORTED(some_integer = int_array[5],
                            ".*Assertion .*n < m_size.*");
}

TEST_F(BoundsCheckedArrayDeathTest, BoundsCheckAssign) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  int_array = Int_array(c_array, 2);
  EXPECT_DEATH_IF_SUPPORTED(int_array[5] = some_integer,
                            ".*Assertion .*n < m_size.*");
}

TEST_F(BoundsCheckedArrayDeathTest, BoundsCheckPopFront) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  int_array = Int_array(c_array, 1);
  int_array.pop_front();
  EXPECT_DEATH_IF_SUPPORTED(int_array.pop_front(),
                            ".*Assertion .*m_size > 0.*");
}

TEST_F(BoundsCheckedArrayDeathTest, BoundsCheckResize) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  int_array = Int_array(c_array, 1);
  EXPECT_DEATH_IF_SUPPORTED(int_array.resize(2),
                            ".*Assertion .*new_size <= m_size.*");
}

TEST_F(BoundsCheckedArrayDeathTest, BoundsCheckResizeAssign) {
  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
  int_array = Int_array(c_array, 2);
  int_array[1] = some_integer;
  int_array.resize(1);
  EXPECT_DEATH_IF_SUPPORTED(int_array[1] = some_integer,
                            ".*Assertion .*n < m_size.*");
}

#endif  // !defined(DBUG_OFF)

TEST_F(BoundsCheckedArray, Indexing) {
  int_array = Int_array(c_array, c_array_size);
  EXPECT_EQ(0, int_array[0]);
  int_array[0] = 42;
  EXPECT_EQ(42, int_array[0]);
}

TEST_F(BoundsCheckedArray, Reset) {
  int_array = Int_array(c_array, c_array_size);
  EXPECT_EQ(c_array, int_array.array());
  EXPECT_FALSE(int_array.is_null());
  int_array.reset();
  int *pi = NULL;
  EXPECT_EQ(pi, int_array.array());
  EXPECT_TRUE(int_array.is_null());
}

TEST_F(BoundsCheckedArray, Resize) {
  int_array = Int_array(c_array, c_array_size);
  int_array.resize(c_array_size - 1);
  EXPECT_EQ(c_array_size - 1, static_cast<int>(int_array.size()));

  int count = 0;
  while (int_array.size() > 0) {
    EXPECT_EQ(count, int_array[0]);
    count++;
    int_array.pop_front();
  }

  EXPECT_EQ(count, c_array_size - 1);
}

TEST_F(BoundsCheckedArray, PopFront) {
  int_array = Int_array(c_array, c_array_size);
  for (int ix = 0; ix < c_array_size; ++ix) {
    EXPECT_EQ(ix, int_array[0]);
    int_array.pop_front();
  }
}

TEST_F(BoundsCheckedArray, Equality) {
  int_array = Int_array(c_array, c_array_size);
  EXPECT_EQ(int_array, int_array);

  Int_array int_array_copy(int_array);
  EXPECT_EQ(int_array, int_array_copy)
      << " original " << int_array << " copy " << int_array_copy;

  int_array_copy.resize(c_array_size - 1);
  EXPECT_NE(int_array, int_array_copy);

  // We share the underlying array, so these should be equal.
  Int_array int_array_two(c_array, c_array_size);
  EXPECT_EQ(int_array, int_array_two);

  int_array_two.pop_front();
  EXPECT_NE(int_array, int_array_two);
}

TEST_F(BoundsCheckedArray, Sort) {
  int_array = Int_array(c_array, c_array_size);
  std::random_shuffle(int_array.begin(), int_array.end());
  std::sort(int_array.begin(), int_array.end());
  Int_array::const_iterator it;
  int ix;
  for (ix = 0, it = int_array.begin(); it != int_array.end(); ++it, ++ix)
    EXPECT_EQ(ix, *it);
}

}  // namespace bounds_check_array_unittest