test/unordered/insert_tests.cpp

// Copyright 2006-2010 Daniel James.
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#if !defined(PIECEWISE_TEST_NAME)

// clang-format off
#include "../helpers/prefix.hpp"
#include <boost/unordered_set.hpp>
#include <boost/unordered_map.hpp>
#include "../helpers/postfix.hpp"
// clang-format on

#include "../helpers/test.hpp"
#include "../objects/test.hpp"
#include "../helpers/random_values.hpp"
#include "../helpers/tracker.hpp"
#include "../helpers/equivalent.hpp"
#include "../helpers/invariants.hpp"
#include "../helpers/input_iterator.hpp"
#include "../helpers/helpers.hpp"

namespace insert_tests {

  test::seed_t initialize_seed(243432);

  template <class X>
  void unique_insert_tests1(X*, test::random_generator generator)
  {
    test::check_instances check_;

    typedef typename X::iterator iterator;
    typedef test::ordered<X> ordered;

    UNORDERED_SUB_TEST("insert(value) tests for containers with unique keys")
    {
      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);

      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {

        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        std::pair<iterator, bool> r1 = x.insert(*it);
        std::pair<typename ordered::iterator, bool> r2 = tracker.insert(*it);

        BOOST_TEST(r1.second == r2.second);
        BOOST_TEST(*r1.first == *r2.first);

        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <=
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert(rvalue) tests for containers with unique keys")
    {
      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);

      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {

        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        typename X::value_type value = *it;
        std::pair<iterator, bool> r1 = x.insert(boost::move(value));
        std::pair<typename ordered::iterator, bool> r2 = tracker.insert(*it);

        BOOST_TEST(r1.second == r2.second);
        BOOST_TEST(*r1.first == *r2.first);

        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <=
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      test::check_equivalent_keys(x);
    }
  }

  template <class X>
  void equivalent_insert_tests1(X*, test::random_generator generator)
  {
    test::check_instances check_;

    UNORDERED_SUB_TEST(
      "insert(value) tests for containers with equivalent keys")
    {
      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        typename X::iterator r1 = x.insert(*it);
        typename test::ordered<X>::iterator r2 = tracker.insert(*it);

        BOOST_TEST(*r1 == *r2);

        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <=
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST(
      "insert(rvalue) tests for containers with equivalent keys")
    {
      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        typename X::value_type value = *it;
        typename X::iterator r1 = x.insert(boost::move(value));
        typename test::ordered<X>::iterator r2 = tracker.insert(*it);

        BOOST_TEST(*r1 == *r2);

        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <=
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      test::check_equivalent_keys(x);
    }
  }

  template <class X> void insert_tests2(X*, test::random_generator generator)
  {
    typedef typename test::ordered<X> tracker_type;
    typedef typename X::iterator iterator;
    typedef typename X::const_iterator const_iterator;
    typedef typename tracker_type::iterator tracker_iterator;

    UNORDERED_SUB_TEST("insert(begin(), value) tests")
    {
      test::check_instances check_;

      X x;
      tracker_type tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        iterator r1 = x.insert(x.begin(), *it);
        tracker_iterator r2 = tracker.insert(tracker.begin(), *it);
        BOOST_TEST(*r1 == *r2);
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <=
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      tracker.compare(x);
      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert(end(), value) tests")
    {
      test::check_instances check_;

      X x;
      X const& x_const = x;
      tracker_type tracker = test::create_ordered(x);

      test::random_values<X> v(100, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        const_iterator r1 = x.insert(x_const.end(), *it);
        tracker_iterator r2 = tracker.insert(tracker.end(), *it);
        BOOST_TEST(*r1 == *r2);
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <=
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      tracker.compare(x);
      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert(pos, value) tests")
    {
      test::check_instances check_;

      X x;
      const_iterator pos = x.begin();
      tracker_type tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        pos = x.insert(pos, *it);
        tracker_iterator r2 = tracker.insert(tracker.begin(), *it);
        BOOST_TEST(*pos == *r2);
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <=
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      tracker.compare(x);
      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert(pos, rvalue) tests")
    {
      test::check_instances check_;

      X x;
      const_iterator pos = x.begin();
      tracker_type tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        typename X::value_type value = *it;
        pos = x.insert(pos, boost::move(value));
        tracker_iterator r2 = tracker.insert(tracker.begin(), *it);
        BOOST_TEST(*pos == *r2);
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <=
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      tracker.compare(x);
      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert single item range tests")
    {
      test::check_instances check_;

      X x;
      tracker_type tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        x.insert(it, test::next(it));
        tracker.insert(*it);
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <=
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      tracker.compare(x);
      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert range tests")
    {
      test::check_instances check_;

      X x;

      test::random_values<X> v(1000, generator);
      x.insert(v.begin(), v.end());

      test::check_container(x, v);
      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert range with rehash tests")
    {
      test::check_instances check_;

      X x;

      test::random_values<X> v(1000, generator);

      x.insert(*v.begin());
      x.clear();

      x.insert(v.begin(), v.end());

      test::check_container(x, v);
      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert input iterator range tests")
    {
      test::check_instances check_;

      X x;

      test::random_values<X> v(1000, generator);
      typename test::random_values<X>::const_iterator begin = v.begin(),
                                                      end = v.end();
      x.insert(test::input_iterator(begin), test::input_iterator(end));
      test::check_container(x, v);

      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert copy iterator range tests")
    {
      test::check_instances check_;

      X x;

      test::random_values<X> v(1000, generator);
      x.insert(test::copy_iterator(v.begin()), test::copy_iterator(v.end()));
      test::check_container(x, v);

      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert copy iterator range test 2")
    {
      test::check_instances check_;

      X x;

      test::random_values<X> v1(500, generator);
      test::random_values<X> v2(500, generator);
      x.insert(test::copy_iterator(v1.begin()), test::copy_iterator(v1.end()));
      x.insert(test::copy_iterator(v2.begin()), test::copy_iterator(v2.end()));

      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert various ranges")
    {
      for (int i = 0; i < 100; ++i) {
        X x;
        test::ordered<X> tracker = test::create_ordered(x);

        test::random_values<X> v(1000, generator);

        for (typename test::random_values<X>::iterator it = v.begin();
             it != v.end();) {
          typename X::size_type old_bucket_count = x.bucket_count();
          float b = x.max_load_factor();

          typename test::random_values<X>::iterator next = it;
          for (std::size_t j = test::random_value(20); j > 0; ++j) {
            ++next;
            if (next == v.end()) {
              break;
            }
          }

          x.insert(it, next);
          tracker.insert(it, next);
          it = next;

          tracker.compare(x); // Slow, but I can't see any other way.

          if (static_cast<double>(x.size()) <=
              b * static_cast<double>(old_bucket_count))
            BOOST_TEST(x.bucket_count() == old_bucket_count);
        }

        test::check_equivalent_keys(x);
      }
    }
  }

  template <class X>
  void unique_emplace_tests1(X*, test::random_generator generator)
  {
    typedef typename X::iterator iterator;
    typedef test::ordered<X> ordered;

    X x;
    test::ordered<X> tracker = test::create_ordered(x);

    test::random_values<X> v(1000, generator);

    for (typename test::random_values<X>::iterator it = v.begin();
         it != v.end(); ++it) {

      typename X::size_type old_bucket_count = x.bucket_count();
      float b = x.max_load_factor();

      std::pair<iterator, bool> r1 = x.emplace(*it);
      std::pair<typename ordered::iterator, bool> r2 = tracker.insert(*it);

      BOOST_TEST(r1.second == r2.second);
      BOOST_TEST(*r1.first == *r2.first);

      tracker.compare_key(x, *it);

      if (static_cast<double>(x.size()) <=
          b * static_cast<double>(old_bucket_count))
        BOOST_TEST(x.bucket_count() == old_bucket_count);
    }

    tracker.compare(x);
    test::check_equivalent_keys(x);
  }

  template <class X>
  void equivalent_emplace_tests1(X*, test::random_generator generator)
  {
    X x;
    test::ordered<X> tracker = test::create_ordered(x);

    test::random_values<X> v(1000, generator);
    for (typename test::random_values<X>::iterator it = v.begin();
         it != v.end(); ++it) {
      typename X::size_type old_bucket_count = x.bucket_count();
      float b = x.max_load_factor();

      typename X::iterator r1 = x.emplace(*it);
      typename test::ordered<X>::iterator r2 = tracker.insert(*it);

      BOOST_TEST(*r1 == *r2);

      tracker.compare_key(x, *it);

      if (static_cast<double>(x.size()) <=
          b * static_cast<double>(old_bucket_count))
        BOOST_TEST(x.bucket_count() == old_bucket_count);
    }

    tracker.compare(x);
    test::check_equivalent_keys(x);
  }

  template <class X>
  void move_emplace_tests(X*, test::random_generator generator)
  {
    X x;
    test::ordered<X> tracker = test::create_ordered(x);

    test::random_values<X> v(1000, generator);

    for (typename test::random_values<X>::iterator it = v.begin();
         it != v.end(); ++it) {

      typename X::size_type old_bucket_count = x.bucket_count();
      float b = x.max_load_factor();

      typename X::value_type value = *it;
      x.emplace(boost::move(value));
      tracker.insert(*it);
      tracker.compare_key(x, *it);

      if (static_cast<double>(x.size()) <=
          b * static_cast<double>(old_bucket_count))
        BOOST_TEST(x.bucket_count() == old_bucket_count);
    }

    tracker.compare(x);
    test::check_equivalent_keys(x);
  }

  template <class X> void default_emplace_tests(X*, test::random_generator)
  {
#if !BOOST_UNORDERED_SUN_WORKAROUNDS1
    bool is_unique = test::has_unique_keys<X>::value;

    X x;

    x.emplace();
    BOOST_TEST(x.size() == 1);
    x.emplace();
    BOOST_TEST(x.size() == (is_unique ? 1u : 2u));
    x.emplace();
    BOOST_TEST(x.size() == (is_unique ? 1u : 3u));

    typename X::value_type y;
    BOOST_TEST(x.count(test::get_key<X>(y)) == (is_unique ? 1u : 3u));
    BOOST_TEST(*x.equal_range(test::get_key<X>(y)).first == y);

    x.emplace(y);
    BOOST_TEST(x.size() == (is_unique ? 1u : 4u));
    BOOST_TEST(x.count(test::get_key<X>(y)) == (is_unique ? 1u : 4u));
    BOOST_TEST(*x.equal_range(test::get_key<X>(y)).first == y);

    x.clear();
    BOOST_TEST(x.empty());
    x.emplace(y);
    BOOST_TEST(x.size() == 1);
    x.emplace(y);
    BOOST_TEST(x.size() == (is_unique ? 1u : 2u));

    BOOST_TEST(x.count(test::get_key<X>(y)) == (is_unique ? 1u : 2u));
    BOOST_TEST(*x.equal_range(test::get_key<X>(y)).first == y);
#endif
  }

  template <class X> void map_tests(X*, test::random_generator generator)
  {
    X x;
    test::ordered<X> tracker = test::create_ordered(x);

    test::random_values<X> v(1000, generator);
    for (typename test::random_values<X>::iterator it = v.begin();
         it != v.end(); ++it) {
      typename X::size_type old_bucket_count = x.bucket_count();
      float b = x.max_load_factor();

      x[it->first] = it->second;
      tracker[it->first] = it->second;

      tracker.compare_key(x, *it);

      if (static_cast<double>(x.size()) <=
          b * static_cast<double>(old_bucket_count))
        BOOST_TEST(x.bucket_count() == old_bucket_count);
    }

    tracker.compare(x);
    test::check_equivalent_keys(x);
  }

  template <class X> void map_tests2(X*, test::random_generator generator)
  {
    typedef typename X::iterator iterator;

    UNORDERED_SUB_TEST("insert_or_assign")
    {
      test::check_instances check_;

      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        std::pair<iterator, bool> r = x.insert_or_assign(it->first, it->second);
        BOOST_TEST(*r.first == *it);

        tracker[it->first] = it->second;
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      tracker.compare(x);
      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert_or_assign(begin)")
    {
      test::check_instances check_;

      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        iterator r = x.insert_or_assign(x.begin(), it->first, it->second);
        BOOST_TEST(*r == *it);

        tracker[it->first] = it->second;
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      tracker.compare(x);
      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert_or_assign(end)")
    {
      test::check_instances check_;

      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        iterator r = x.insert_or_assign(x.end(), it->first, it->second);
        BOOST_TEST(*r == *it);

        tracker[it->first] = it->second;
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      tracker.compare(x);
      test::check_equivalent_keys(x);
    }

    UNORDERED_SUB_TEST("insert_or_assign(last)")
    {
      test::check_instances check_;

      X x;
      test::ordered<X> tracker = test::create_ordered(x);
      iterator last = x.begin();

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        iterator r = x.insert_or_assign(last, it->first, it->second);
        BOOST_TEST(*r == *it);

        tracker[it->first] = it->second;
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);

        last = r;
      }

      tracker.compare(x);
      test::check_equivalent_keys(x);
    }
  }

  template <class X>
  void try_emplace_tests(X*, test::random_generator generator)
  {
    typedef typename X::iterator iterator;

    UNORDERED_SUB_TEST("try_emplace(key, value)")
    {
      test::check_instances check_;

      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        iterator pos = x.find(it->first);
        bool found = pos != x.end();

        std::pair<typename X::iterator, bool> r =
          x.try_emplace(it->first, it->second);
        if (found) {
          BOOST_TEST(pos == r.first);
          BOOST_TEST(!r.second);
        } else {
          BOOST_TEST(r.second);
        }
        BOOST_TEST_EQ(r.first->first, it->first);
        BOOST_TEST_EQ(r.first->second, it->second);

        tracker.insert(*it);
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      test::check_equivalent_keys(x);
    }

    typedef typename X::iterator iterator;

    UNORDERED_SUB_TEST("try_emplace(begin(), key, value)")
    {
      test::check_instances check_;

      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        iterator pos = x.find(it->first);
        bool found = pos != x.end();

        typename X::iterator r =
          x.try_emplace(r.begin(), it->first, it->second);
        if (found) {
          BOOST_TEST(pos == r);
        }
        BOOST_TEST_EQ(r->first, it->first);
        BOOST_TEST_EQ(r->second, it->second);

        tracker.insert(*it);
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      test::check_equivalent_keys(x);
    }

    typedef typename X::iterator iterator;

    UNORDERED_SUB_TEST("try_emplace(end(), key, value)")
    {
      test::check_instances check_;

      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        iterator pos = x.find(it->first);
        bool found = pos != x.end();

        typename X::iterator r = x.try_emplace(r.end(), it->first, it->second);
        if (found) {
          BOOST_TEST(pos == r);
        }
        BOOST_TEST_EQ(r->first, it->first);
        BOOST_TEST_EQ(r->second, it->second);

        tracker.insert(*it);
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      test::check_equivalent_keys(x);
    }

    typedef typename X::iterator iterator;

    UNORDERED_SUB_TEST("try_emplace(pos, key, value)")
    {
      test::check_instances check_;

      X x;
      test::ordered<X> tracker = test::create_ordered(x);

      test::random_values<X> v(1000, generator);
      for (typename test::random_values<X>::iterator it = v.begin();
           it != v.end(); ++it) {
        typename X::size_type old_bucket_count = x.bucket_count();
        float b = x.max_load_factor();

        iterator pos = x.find(it->first);
        bool found = pos != x.end();

        typename X::iterator r = x.try_emplace(pos, it->first, it->second);
        if (found) {
          BOOST_TEST(pos == r);
        }
        BOOST_TEST_EQ(r->first, it->first);
        BOOST_TEST_EQ(r->second, it->second);

        tracker.insert(*it);
        tracker.compare_key(x, *it);

        if (static_cast<double>(x.size()) <
            b * static_cast<double>(old_bucket_count))
          BOOST_TEST(x.bucket_count() == old_bucket_count);
      }

      test::check_equivalent_keys(x);
    }
  }

  // Some tests for when the range's value type doesn't match the container's
  // value type.

  template <class X>
  void map_insert_range_test1(X*, test::random_generator generator)
  {
    test::check_instances check_;

    typedef test::list<
      std::pair<typename X::key_type, typename X::mapped_type> >
      list;
    test::random_values<X> v(1000, generator);
    list l(v.begin(), v.end());

    X x;
    x.insert(l.begin(), l.end());

    test::check_equivalent_keys(x);
  }

  template <class X>
  void map_insert_range_test2(X*, test::random_generator generator)
  {
    test::check_instances check_;

    typedef test::list<
      std::pair<typename X::key_type const, test::implicitly_convertible> >
      list;
    test::random_values<
      boost::unordered_map<typename X::key_type, test::implicitly_convertible> >
      v(1000, generator);
    list l(v.begin(), v.end());

    X x;
    x.insert(l.begin(), l.end());

    test::check_equivalent_keys(x);
  }

  boost::unordered_set<test::movable, test::hash, test::equal_to,
    std::allocator<test::movable> >* test_set_std_alloc;
  boost::unordered_multimap<test::object, test::object, test::hash,
    test::equal_to, std::allocator<test::object> >* test_multimap_std_alloc;

  boost::unordered_set<test::object, test::hash, test::equal_to,
    test::allocator1<test::object> >* test_set;
  boost::unordered_multiset<test::movable, test::hash, test::equal_to,
    test::allocator2<test::movable> >* test_multiset;
  boost::unordered_map<test::movable, test::movable, test::hash, test::equal_to,
    test::allocator2<test::movable> >* test_map;
  boost::unordered_multimap<test::object, test::object, test::hash,
    test::equal_to, test::allocator1<test::object> >* test_multimap;

  using test::default_generator;
  using test::generate_collisions;
  using test::limited_range;

  UNORDERED_TEST(unique_insert_tests1,
    ((test_set_std_alloc)(test_set)(test_map))(
      (default_generator)(generate_collisions)(limited_range)))

  UNORDERED_TEST(equivalent_insert_tests1,
    ((test_multimap_std_alloc)(test_multiset)(test_multimap))(
      (default_generator)(generate_collisions)(limited_range)))

  UNORDERED_TEST(insert_tests2,
    ((test_multimap_std_alloc)(test_set)(test_multiset)(test_map)(
      test_multimap))((default_generator)(generate_collisions)(limited_range)))

  UNORDERED_TEST(unique_emplace_tests1,
    ((test_set_std_alloc)(test_set)(test_map))(
      (default_generator)(generate_collisions)(limited_range)))

  UNORDERED_TEST(equivalent_emplace_tests1,
    ((test_multimap_std_alloc)(test_multiset)(test_multimap))(
      (default_generator)(generate_collisions)(limited_range)))

  UNORDERED_TEST(move_emplace_tests,
    ((test_set_std_alloc)(test_multimap_std_alloc)(test_set)(test_map)(
      test_multiset)(test_multimap))(
      (default_generator)(generate_collisions)(limited_range)))

  UNORDERED_TEST(default_emplace_tests,
    ((test_set_std_alloc)(test_multimap_std_alloc)(test_set)(test_map)(
      test_multiset)(test_multimap))(
      (default_generator)(generate_collisions)(limited_range)))

  UNORDERED_TEST(map_tests,
    ((test_map))((default_generator)(generate_collisions)(limited_range)))

  UNORDERED_TEST(
    map_tests2, ((test_map))((default_generator)(generate_collisions)))

  UNORDERED_TEST(map_insert_range_test1,
    ((test_multimap_std_alloc)(test_map)(test_multimap))(
      (default_generator)(generate_collisions)(limited_range)))

  UNORDERED_TEST(map_insert_range_test2,
    ((test_multimap_std_alloc)(test_map)(test_multimap))(
      (default_generator)(generate_collisions)(limited_range)))

#if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)

  struct initialize_from_two_ints
  {
    int a, b;

    friend std::size_t hash_value(initialize_from_two_ints const& x)
    {
      return static_cast<std::size_t>(x.a + x.b);
    }

    bool operator==(initialize_from_two_ints const& x) const
    {
      return a == x.a && b == x.b;
    }
  };

  UNORDERED_AUTO_TEST (insert_initializer_list_set) {
    boost::unordered_set<int> set;
    set.insert({1, 2, 3, 1});
    BOOST_TEST_EQ(set.size(), 3u);
    BOOST_TEST(set.find(1) != set.end());
    BOOST_TEST(set.find(4) == set.end());

    boost::unordered_set<initialize_from_two_ints> set2;

#if defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 5))
    set2.insert({{1, 2}});
#else
    set2.insert({1, 2});
#endif
    BOOST_TEST(set2.size() == 1);
    BOOST_TEST(set2.find({1, 2}) != set2.end());
    BOOST_TEST(set2.find({2, 1}) == set2.end());

    set2.insert({{3, 4}, {5, 6}, {7, 8}});
    BOOST_TEST(set2.size() == 4);
    BOOST_TEST(set2.find({1, 2}) != set2.end());
    BOOST_TEST(set2.find({3, 4}) != set2.end());
    BOOST_TEST(set2.find({5, 6}) != set2.end());
    BOOST_TEST(set2.find({7, 8}) != set2.end());
    BOOST_TEST(set2.find({8, 7}) == set2.end());

    set2.insert({{2, 1}, {3, 4}});
    BOOST_TEST(set2.size() == 5);
    BOOST_TEST(set2.find({1, 2}) != set2.end());
    BOOST_TEST(set2.find({2, 1}) != set2.end());
    BOOST_TEST(set2.find({3, 4}) != set2.end());
    BOOST_TEST(set2.find({5, 6}) != set2.end());
    BOOST_TEST(set2.find({7, 8}) != set2.end());
    BOOST_TEST(set2.find({8, 7}) == set2.end());
  }

#if !BOOST_WORKAROUND(BOOST_MSVC, == 1800)

  UNORDERED_AUTO_TEST (insert_initializer_list_multiset) {
    boost::unordered_multiset<std::string> multiset;
    // multiset.insert({});
    BOOST_TEST(multiset.empty());
    multiset.insert({"a"});
    BOOST_TEST_EQ(multiset.size(), 1u);
    BOOST_TEST(multiset.find("a") != multiset.end());
    BOOST_TEST(multiset.find("b") == multiset.end());
    multiset.insert({"a", "b"});
    BOOST_TEST(multiset.size() == 3);
    BOOST_TEST_EQ(multiset.count("a"), 2u);
    BOOST_TEST_EQ(multiset.count("b"), 1u);
    BOOST_TEST_EQ(multiset.count("c"), 0u);
  }

#endif

  UNORDERED_AUTO_TEST (insert_initializer_list_map) {
    boost::unordered_map<std::string, std::string> map;
    // map.insert({});
    BOOST_TEST(map.empty());
    map.insert({{"a", "b"}, {"a", "b"}, {"d", ""}});
    BOOST_TEST_EQ(map.size(), 2u);
  }

  UNORDERED_AUTO_TEST (insert_initializer_list_multimap) {
    boost::unordered_multimap<std::string, std::string> multimap;
    // multimap.insert({});
    BOOST_TEST(multimap.empty());
    multimap.insert({{"a", "b"}, {"a", "b"}, {"d", ""}});
    BOOST_TEST_EQ(multimap.size(), 3u);
    BOOST_TEST_EQ(multimap.count("a"), 2u);
  }

#endif

  struct overloaded_constructor
  {
    overloaded_constructor(int x1_ = 1, int x2_ = 2, int x3_ = 3, int x4_ = 4)
        : x1(x1_), x2(x2_), x3(x3_), x4(x4_)
    {
    }

    int x1, x2, x3, x4;

    bool operator==(overloaded_constructor const& rhs) const
    {
      return x1 == rhs.x1 && x2 == rhs.x2 && x3 == rhs.x3 && x4 == rhs.x4;
    }

    friend std::size_t hash_value(overloaded_constructor const& x)
    {
      std::size_t hash = 0;
      boost::hash_combine(hash, x.x1);
      boost::hash_combine(hash, x.x2);
      boost::hash_combine(hash, x.x3);
      boost::hash_combine(hash, x.x4);
      return hash;
    }
  };

  UNORDERED_AUTO_TEST (map_emplace_test) {
    {
      boost::unordered_map<int, overloaded_constructor, test::hash,
        test::equal_to,
        test::allocator1<std::pair<int const, overloaded_constructor> > >
        x;

#if !BOOST_UNORDERED_SUN_WORKAROUNDS1
      x.emplace();
      BOOST_TEST(
        x.find(0) != x.end() && x.find(0)->second == overloaded_constructor());
#endif

      x.emplace(2, 3);
      BOOST_TEST(
        x.find(2) != x.end() && x.find(2)->second == overloaded_constructor(3));

      x.try_emplace(5);
      BOOST_TEST(
        x.find(5) != x.end() && x.find(5)->second == overloaded_constructor());
    }

    {
      boost::unordered_multimap<int, overloaded_constructor, test::hash,
        test::equal_to,
        test::allocator1<std::pair<int const, overloaded_constructor> > >
        x;

#if !BOOST_UNORDERED_SUN_WORKAROUNDS1
      x.emplace();
      BOOST_TEST(
        x.find(0) != x.end() && x.find(0)->second == overloaded_constructor());
#endif

      x.emplace(2, 3);
      BOOST_TEST(
        x.find(2) != x.end() && x.find(2)->second == overloaded_constructor(3));
    }
  }

  UNORDERED_AUTO_TEST (set_emplace_test) {
    boost::unordered_set<overloaded_constructor> x;
    overloaded_constructor check;

#if !BOOST_UNORDERED_SUN_WORKAROUNDS1
    x.emplace();
    BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);
#endif

    x.clear();
    x.emplace(1);
    check = overloaded_constructor(1);
    BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);

    x.clear();
    x.emplace(2, 3);
    check = overloaded_constructor(2, 3);
    BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);

    x.clear();
    x.emplace(4, 5, 6);
    check = overloaded_constructor(4, 5, 6);
    BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);

    x.clear();
    x.emplace(7, 8, 9, 10);
    check = overloaded_constructor(7, 8, 9, 10);
    BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);
  }

  struct derived_from_piecewise_construct_t
    : boost::unordered::piecewise_construct_t
  {
  };

  derived_from_piecewise_construct_t piecewise_rvalue()
  {
    return derived_from_piecewise_construct_t();
  }

  struct convertible_to_piecewise
  {
    operator boost::unordered::piecewise_construct_t() const
    {
      return boost::unordered::piecewise_construct;
    }
  };

  UNORDERED_AUTO_TEST (map_emplace_test2) {
    // Emulating piecewise construction with boost::tuple bypasses the
    // allocator's construct method, but still uses test destroy method.
    test::detail::disable_construction_tracking _scoped;

    {
      boost::unordered_map<overloaded_constructor, overloaded_constructor,
        boost::hash<overloaded_constructor>,
        std::equal_to<overloaded_constructor>,
        test::allocator1<
          std::pair<overloaded_constructor const, overloaded_constructor> > >
        x;

      x.emplace(boost::unordered::piecewise_construct, boost::make_tuple(),
        boost::make_tuple());
      BOOST_TEST(
        x.find(overloaded_constructor()) != x.end() &&
        x.find(overloaded_constructor())->second == overloaded_constructor());

      x.emplace(
        convertible_to_piecewise(), boost::make_tuple(1), boost::make_tuple());
      BOOST_TEST(
        x.find(overloaded_constructor(1)) != x.end() &&
        x.find(overloaded_constructor(1))->second == overloaded_constructor());

      x.emplace(piecewise_rvalue(), boost::make_tuple(2, 3),
        boost::make_tuple(4, 5, 6));
      BOOST_TEST(x.find(overloaded_constructor(2, 3)) != x.end() &&
                 x.find(overloaded_constructor(2, 3))->second ==
                   overloaded_constructor(4, 5, 6));

      derived_from_piecewise_construct_t d;
      x.emplace(d, boost::make_tuple(9, 3, 1), boost::make_tuple(10));
      BOOST_TEST(x.find(overloaded_constructor(9, 3, 1)) != x.end() &&
                 x.find(overloaded_constructor(9, 3, 1))->second ==
                   overloaded_constructor(10));

      x.clear();

      x.try_emplace(overloaded_constructor());
      BOOST_TEST(
        x.find(overloaded_constructor()) != x.end() &&
        x.find(overloaded_constructor())->second == overloaded_constructor());

      x.try_emplace(1);
      BOOST_TEST(
        x.find(overloaded_constructor(1)) != x.end() &&
        x.find(overloaded_constructor(1))->second == overloaded_constructor());

      x.try_emplace(overloaded_constructor(2, 3), 4, 5, 6);
      BOOST_TEST(x.find(overloaded_constructor(2, 3)) != x.end() &&
                 x.find(overloaded_constructor(2, 3))->second ==
                   overloaded_constructor(4, 5, 6));

      x.clear();

      x.try_emplace(x.begin(), overloaded_constructor());
      BOOST_TEST(
        x.find(overloaded_constructor()) != x.end() &&
        x.find(overloaded_constructor())->second == overloaded_constructor());

      x.try_emplace(x.end(), 1);
      BOOST_TEST(
        x.find(overloaded_constructor(1)) != x.end() &&
        x.find(overloaded_constructor(1))->second == overloaded_constructor());

      x.try_emplace(x.begin(), overloaded_constructor(2, 3), 4, 5, 6);
      BOOST_TEST(x.find(overloaded_constructor(2, 3)) != x.end() &&
                 x.find(overloaded_constructor(2, 3))->second ==
                   overloaded_constructor(4, 5, 6));
    }

    {
      boost::unordered_multimap<overloaded_constructor, overloaded_constructor,
        boost::hash<overloaded_constructor>,
        std::equal_to<overloaded_constructor>,
        test::allocator1<
          std::pair<overloaded_constructor const, overloaded_constructor> > >
        x;

      x.emplace(boost::unordered::piecewise_construct, boost::make_tuple(),
        boost::make_tuple());
      BOOST_TEST(
        x.find(overloaded_constructor()) != x.end() &&
        x.find(overloaded_constructor())->second == overloaded_constructor());

      x.emplace(
        convertible_to_piecewise(), boost::make_tuple(1), boost::make_tuple());
      BOOST_TEST(
        x.find(overloaded_constructor(1)) != x.end() &&
        x.find(overloaded_constructor(1))->second == overloaded_constructor());

      x.emplace(piecewise_rvalue(), boost::make_tuple(2, 3),
        boost::make_tuple(4, 5, 6));
      BOOST_TEST(x.find(overloaded_constructor(2, 3)) != x.end() &&
                 x.find(overloaded_constructor(2, 3))->second ==
                   overloaded_constructor(4, 5, 6));

      derived_from_piecewise_construct_t d;
      x.emplace(d, boost::make_tuple(9, 3, 1), boost::make_tuple(10));
      BOOST_TEST(x.find(overloaded_constructor(9, 3, 1)) != x.end() &&
                 x.find(overloaded_constructor(9, 3, 1))->second ==
                   overloaded_constructor(10));
    }
  }

  UNORDERED_AUTO_TEST (set_emplace_test2) {
    boost::unordered_set<
      std::pair<overloaded_constructor, overloaded_constructor> >
      x;
    std::pair<overloaded_constructor, overloaded_constructor> check;

    x.emplace(boost::unordered::piecewise_construct, boost::make_tuple(),
      boost::make_tuple());
    BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);

    x.clear();
    x.emplace(boost::unordered::piecewise_construct, boost::make_tuple(1),
      boost::make_tuple(2, 3));
    check =
      std::make_pair(overloaded_constructor(1), overloaded_constructor(2, 3));
    BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);
  }

// Use the preprocessor to generate tests using different combinations of
// boost/std piecewise_construct_t/tuple.

#define PIECEWISE_TEST_NAME boost_tuple_piecewise_tests
#define PIECEWISE_NAMESPACE boost::unordered
#define TUPLE_NAMESPACE boost
#define EMULATING_PIECEWISE_CONSTRUCTION 1
#include "./insert_tests.cpp"

#if BOOST_UNORDERED_HAVE_PIECEWISE_CONSTRUCT

#define PIECEWISE_TEST_NAME boost_tuple_std_piecewise_tests
#define PIECEWISE_NAMESPACE std
#define TUPLE_NAMESPACE boost
#define EMULATING_PIECEWISE_CONSTRUCTION 1
#include "./insert_tests.cpp"

#endif

#if !defined(BOOST_NO_CXX11_HDR_TUPLE)

#define PIECEWISE_TEST_NAME std_tuple_boost_piecewise_tests
#define PIECEWISE_NAMESPACE boost::unordered
#define TUPLE_NAMESPACE std
#define EMULATING_PIECEWISE_CONSTRUCTION 0
#include "./insert_tests.cpp"

#endif

#if !defined(BOOST_NO_CXX11_HDR_TUPLE) &&                                      \
  BOOST_UNORDERED_HAVE_PIECEWISE_CONSTRUCT

#define PIECEWISE_TEST_NAME std_piecewise_tests
#define PIECEWISE_NAMESPACE std
#define TUPLE_NAMESPACE std
#define EMULATING_PIECEWISE_CONSTRUCTION 0
#include "./insert_tests.cpp"

#endif
}

RUN_TESTS_QUIET()

#else // PIECEWISE_TEST_NAME

UNORDERED_AUTO_TEST (PIECEWISE_TEST_NAME) {
#if EMULATING_PIECEWISE_CONSTRUCTION
  test::detail::disable_construction_tracking _scoped;
#endif

  {
    boost::unordered_map<overloaded_constructor, overloaded_constructor,
      boost::hash<overloaded_constructor>,
      std::equal_to<overloaded_constructor>,
      test::allocator1<
        std::pair<overloaded_constructor const, overloaded_constructor> > >
      x;

    x.emplace(PIECEWISE_NAMESPACE::piecewise_construct,
      TUPLE_NAMESPACE::make_tuple(), TUPLE_NAMESPACE::make_tuple());
    BOOST_TEST(
      x.find(overloaded_constructor()) != x.end() &&
      x.find(overloaded_constructor())->second == overloaded_constructor());

    x.emplace(convertible_to_piecewise(), TUPLE_NAMESPACE::make_tuple(1),
      TUPLE_NAMESPACE::make_tuple());
    BOOST_TEST(
      x.find(overloaded_constructor(1)) != x.end() &&
      x.find(overloaded_constructor(1))->second == overloaded_constructor());

    x.emplace(piecewise_rvalue(), TUPLE_NAMESPACE::make_tuple(2, 3),
      TUPLE_NAMESPACE::make_tuple(4, 5, 6));
    BOOST_TEST(x.find(overloaded_constructor(2, 3)) != x.end() &&
               x.find(overloaded_constructor(2, 3))->second ==
                 overloaded_constructor(4, 5, 6));

    derived_from_piecewise_construct_t d;
    x.emplace(
      d, TUPLE_NAMESPACE::make_tuple(9, 3, 1), TUPLE_NAMESPACE::make_tuple(10));
    BOOST_TEST(x.find(overloaded_constructor(9, 3, 1)) != x.end() &&
               x.find(overloaded_constructor(9, 3, 1))->second ==
                 overloaded_constructor(10));

    x.clear();

    x.try_emplace(overloaded_constructor());
    BOOST_TEST(
      x.find(overloaded_constructor()) != x.end() &&
      x.find(overloaded_constructor())->second == overloaded_constructor());

    x.try_emplace(1);
    BOOST_TEST(
      x.find(overloaded_constructor(1)) != x.end() &&
      x.find(overloaded_constructor(1))->second == overloaded_constructor());

    x.try_emplace(overloaded_constructor(2, 3), 4, 5, 6);
    BOOST_TEST(x.find(overloaded_constructor(2, 3)) != x.end() &&
               x.find(overloaded_constructor(2, 3))->second ==
                 overloaded_constructor(4, 5, 6));
  }
  {
    boost::unordered_multimap<overloaded_constructor, overloaded_constructor,
      boost::hash<overloaded_constructor>,
      std::equal_to<overloaded_constructor>,
      test::allocator1<
        std::pair<overloaded_constructor const, overloaded_constructor> > >
      x;

    x.emplace(PIECEWISE_NAMESPACE::piecewise_construct,
      TUPLE_NAMESPACE::make_tuple(), TUPLE_NAMESPACE::make_tuple());
    BOOST_TEST(
      x.find(overloaded_constructor()) != x.end() &&
      x.find(overloaded_constructor())->second == overloaded_constructor());

    x.emplace(convertible_to_piecewise(), TUPLE_NAMESPACE::make_tuple(1),
      TUPLE_NAMESPACE::make_tuple());
    BOOST_TEST(
      x.find(overloaded_constructor(1)) != x.end() &&
      x.find(overloaded_constructor(1))->second == overloaded_constructor());

    x.emplace(piecewise_rvalue(), TUPLE_NAMESPACE::make_tuple(2, 3),
      TUPLE_NAMESPACE::make_tuple(4, 5, 6));
    BOOST_TEST(x.find(overloaded_constructor(2, 3)) != x.end() &&
               x.find(overloaded_constructor(2, 3))->second ==
                 overloaded_constructor(4, 5, 6));

    derived_from_piecewise_construct_t d;
    x.emplace(
      d, TUPLE_NAMESPACE::make_tuple(9, 3, 1), TUPLE_NAMESPACE::make_tuple(10));
    BOOST_TEST(x.find(overloaded_constructor(9, 3, 1)) != x.end() &&
               x.find(overloaded_constructor(9, 3, 1))->second ==
                 overloaded_constructor(10));
  }
}

UNORDERED_AUTO_TEST (BOOST_PP_CAT(PIECEWISE_TEST_NAME, 2)) {
#if EMULATING_PIECEWISE_CONSTRUCTION
  test::detail::disable_construction_tracking _scoped;
#endif

  boost::unordered_set<
    std::pair<overloaded_constructor, overloaded_constructor> >
    x;
  std::pair<overloaded_constructor, overloaded_constructor> check;

  x.emplace(PIECEWISE_NAMESPACE::piecewise_construct,
    TUPLE_NAMESPACE::make_tuple(), TUPLE_NAMESPACE::make_tuple());
  BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);

  x.clear();
  x.emplace(PIECEWISE_NAMESPACE::piecewise_construct,
    TUPLE_NAMESPACE::make_tuple(1), TUPLE_NAMESPACE::make_tuple(2, 3));
  check =
    std::make_pair(overloaded_constructor(1), overloaded_constructor(2, 3));
  BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);
}

#undef PIECEWISE_TEST_NAME
#undef PIECEWISE_NAMESPACE
#undef TUPLE_NAMESPACE
#undef EMULATING_PIECEWISE_CONSTRUCTION

#endif