// Boost.Range library
//
//  Copyright Neil Groves 2010. Use, modification and
//  distribution is subject to 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)
//
//
// For more information, see http://www.boost.org/libs/range/
//
#include <boost/range/algorithm_ext/push_back.hpp>

#include <boost/test/test_tools.hpp>
#include <boost/test/unit_test.hpp>

#include <boost/range/iterator.hpp>
#include <boost/range/irange.hpp>
#include <algorithm>
#include <list>
#include <vector>


namespace
{
    template< class Container >
    void test_push_back_impl(std::size_t n)
    {
        Container reference;
        for (std::size_t i = 0; i < n; ++i)
            reference.push_back(i);

        Container test;
        boost::push_back(test, boost::irange<std::size_t>(0, n));

        BOOST_CHECK_EQUAL_COLLECTIONS( reference.begin(), reference.end(),
            test.begin(), test.end() );

        // Do it again to push onto non-empty container
        for (std::size_t j = 0; j < n; ++j)
            reference.push_back(j);

        boost::push_back(test, boost::irange<std::size_t>(0, n));

        BOOST_CHECK_EQUAL_COLLECTIONS( reference.begin(), reference.end(),
            test.begin(), test.end() );
    }

    template< class Container >
    void test_push_back_impl()
    {
        test_push_back_impl< Container >(0);
        test_push_back_impl< Container >(1);
        test_push_back_impl< Container >(2);
        test_push_back_impl< Container >(100);
    }

    void test_push_back()
    {
        test_push_back_impl< std::vector<std::size_t> >();
        test_push_back_impl< std::list<std::size_t> >();
    }

#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
    // test type which is not copyable by moveable.
    class noncopyable_int : boost::noncopyable {
      private:
        int i;
      public:
        noncopyable_int(int x) : i(x) {}
        noncopyable_int(const noncopyable_int&) = delete;
        noncopyable_int& operator=(const noncopyable_int&) = delete;
        noncopyable_int(noncopyable_int&& o) : i(o.i) {}
        noncopyable_int& operator=(noncopyable_int&& o) { return o; }
        bool operator!=(const noncopyable_int &rhs) { return i != rhs.i; }
        friend std::ostream &operator<<(std::ostream &os, const noncopyable_int& x);
    };

    std::ostream & operator<<(std::ostream &os, const noncopyable_int& x)
    {
       return os << x.i;
    }

    template< class Container >
    void test_push_back_move_impl(std::size_t n)
    {
        Container test;
        Container reference;
        for (std::size_t i = 0; i < n; ++i)
            reference.push_back(noncopyable_int(i));

        {
            Container to_push_back;
            for (std::size_t i = 0; i < n; ++i)
                to_push_back.push_back(noncopyable_int(i));

            boost::push_back(test, std::move(to_push_back));

            BOOST_CHECK_EQUAL_COLLECTIONS( reference.begin(), reference.end(),
                test.begin(), test.end() );
        }
        // Do it again to push onto non-empty container
        for (std::size_t i = 0; i < n; ++i)
            reference.push_back(noncopyable_int(i));

        {
            Container to_push_back;
            for (std::size_t i = 0; i < n; ++i)
                to_push_back.push_back(noncopyable_int(i));

            boost::push_back(test, std::move(to_push_back));

            BOOST_CHECK_EQUAL_COLLECTIONS( reference.begin(), reference.end(),
                test.begin(), test.end() );
        }
    }

    template< class Container >
    void test_push_back_move_impl()
    {
        test_push_back_move_impl< Container >(0);
        test_push_back_move_impl< Container >(1);
        test_push_back_move_impl< Container >(2);
        test_push_back_move_impl< Container >(100);
    }

    void test_push_back_move()
    {
        test_push_back_move_impl< std::vector<noncopyable_int> >();
        test_push_back_move_impl< std::list<noncopyable_int> >();
    }
#endif
}

boost::unit_test::test_suite*
init_unit_test_suite(int argc, char* argv[])
{
    boost::unit_test::test_suite* test
        = BOOST_TEST_SUITE( "RangeTestSuite.algorithm_ext.push_back" );

    test->add( BOOST_TEST_CASE( &test_push_back ) );
#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
    test->add( BOOST_TEST_CASE( &test_push_back_move ) );
#endif

    return test;
}