Merged utility/swap tests to release branch.

[SVN r49762]

swap/test/swap_arrays.cpp

@@ -0,0 +1,100 @@
+// Copyright (c) 2008 Joseph Gauterin, Niels Dekker
+//
+// 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)
+
+#include <boost/utility/swap.hpp>
+#define BOOST_INCLUDE_MAIN
+#include <boost/test/test_tools.hpp>
+
+//Put test class in the global namespace
+#include "./swap_test_class.hpp"
+
+#include <algorithm> //for std::copy and std::equal
+#include <cstddef> //for std::size_t
+
+//Provide swap function in both the namespace of swap_test_class
+//(which is the global namespace), and the std namespace.
+//It's common to provide a swap function for a class in both
+//namespaces. Scott Meyers recommends doing so: Effective C++,
+//Third Edition, item 25, "Consider support for a non-throwing swap".
+void swap(swap_test_class& left, swap_test_class& right)
+{
+  left.swap(right);
+}
+
+namespace std
+{
+  template <>
+  void swap(swap_test_class& left, swap_test_class& right)
+  {
+    left.swap(right);
+  }
+}
+
+// Tests swapping 1-dimensional arrays.
+void test_swapping_1D_arrays()
+{
+  const std::size_t dimension = 2;
+  const swap_test_class initial_array1[dimension] = { swap_test_class(1), swap_test_class(2) };
+  const swap_test_class initial_array2[dimension] = { swap_test_class(3), swap_test_class(4) };
+  
+  swap_test_class array1[dimension];
+  swap_test_class array2[dimension];
+
+  std::copy(initial_array1, initial_array1 + dimension, array1);
+  std::copy(initial_array2, initial_array2 + dimension, array2);
+  
+  swap_test_class::reset();
+  boost::swap(array1, array2);
+
+  BOOST_CHECK(std::equal(array1, array1 + dimension, initial_array2));
+  BOOST_CHECK(std::equal(array2, array2 + dimension, initial_array1));
+
+  BOOST_CHECK_EQUAL(swap_test_class::swap_count(), dimension);
+  BOOST_CHECK_EQUAL(swap_test_class::copy_count(), 0);
+}
+
+
+// Tests swapping 2-dimensional arrays.
+void test_swapping_2D_arrays()
+{
+  const std::size_t first_dimension = 3;
+  const std::size_t second_dimension = 4;
+  const std::size_t number_of_elements = first_dimension * second_dimension;
+
+  swap_test_class array1[first_dimension][second_dimension];
+  swap_test_class array2[first_dimension][second_dimension];
+
+  swap_test_class* const ptr1 = array1[0];
+  swap_test_class* const ptr2 = array2[0];
+
+  for (std::size_t i = 0; i < number_of_elements; ++i)
+  {
+    ptr1[i].set_data( static_cast<int>(i) );
+    ptr2[i].set_data( static_cast<int>(i + number_of_elements) );
+  }
+
+  swap_test_class::reset();
+  boost::swap(array1, array2);
+
+  for (std::size_t i = 0; i < number_of_elements; ++i)
+  {
+    BOOST_CHECK_EQUAL(ptr1[i].get_data(), static_cast<int>(i + number_of_elements) );
+    BOOST_CHECK_EQUAL(ptr2[i].get_data(), static_cast<int>(i) );
+  }
+
+  BOOST_CHECK_EQUAL(swap_test_class::swap_count(), number_of_elements);
+  BOOST_CHECK_EQUAL(swap_test_class::copy_count(), 0);
+}
+
+
+int test_main(int, char*[])
+{
+  test_swapping_1D_arrays();
+  test_swapping_2D_arrays();
+
+  return 0;
+}
+