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101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
// Copyright (c) 2008 Joseph Gauterin, Niels Dekker
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/utility/swap.hpp>
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#define BOOST_INCLUDE_MAIN
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#include <boost/test/test_tools.hpp>
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//Put test class in the global namespace
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#include "./swap_test_class.hpp"
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#include <algorithm> //for std::copy and std::equal
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#include <cstddef> //for std::size_t
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//Provide swap function in both the namespace of swap_test_class
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//(which is the global namespace), and the std namespace.
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//It's common to provide a swap function for a class in both
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//namespaces. Scott Meyers recommends doing so: Effective C++,
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//Third Edition, item 25, "Consider support for a non-throwing swap".
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void swap(swap_test_class& left, swap_test_class& right)
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{
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left.swap(right);
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}
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namespace std
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{
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template <>
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void swap(swap_test_class& left, swap_test_class& right)
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{
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left.swap(right);
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}
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}
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// Tests swapping 1-dimensional arrays.
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void test_swapping_1D_arrays()
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{
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const std::size_t dimension = 2;
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const swap_test_class initial_array1[dimension] = { swap_test_class(1), swap_test_class(2) };
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const swap_test_class initial_array2[dimension] = { swap_test_class(3), swap_test_class(4) };
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swap_test_class array1[dimension];
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swap_test_class array2[dimension];
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std::copy(initial_array1, initial_array1 + dimension, array1);
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std::copy(initial_array2, initial_array2 + dimension, array2);
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swap_test_class::reset();
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boost::swap(array1, array2);
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BOOST_CHECK(std::equal(array1, array1 + dimension, initial_array2));
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BOOST_CHECK(std::equal(array2, array2 + dimension, initial_array1));
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BOOST_CHECK_EQUAL(swap_test_class::swap_count(), dimension);
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BOOST_CHECK_EQUAL(swap_test_class::copy_count(), 0);
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}
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// Tests swapping 2-dimensional arrays.
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void test_swapping_2D_arrays()
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{
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const std::size_t first_dimension = 3;
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const std::size_t second_dimension = 4;
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const std::size_t number_of_elements = first_dimension * second_dimension;
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swap_test_class array1[first_dimension][second_dimension];
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swap_test_class array2[first_dimension][second_dimension];
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swap_test_class* const ptr1 = array1[0];
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swap_test_class* const ptr2 = array2[0];
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for (std::size_t i = 0; i < number_of_elements; ++i)
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{
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ptr1[i].set_data( static_cast<int>(i) );
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ptr2[i].set_data( static_cast<int>(i + number_of_elements) );
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}
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swap_test_class::reset();
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boost::swap(array1, array2);
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for (std::size_t i = 0; i < number_of_elements; ++i)
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{
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BOOST_CHECK_EQUAL(ptr1[i].get_data(), static_cast<int>(i + number_of_elements) );
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BOOST_CHECK_EQUAL(ptr2[i].get_data(), static_cast<int>(i) );
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}
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BOOST_CHECK_EQUAL(swap_test_class::swap_count(), number_of_elements);
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BOOST_CHECK_EQUAL(swap_test_class::copy_count(), 0);
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}
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int test_main(int, char*[])
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{
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test_swapping_1D_arrays();
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test_swapping_2D_arrays();
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return 0;
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}
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