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- // 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/irange.hpp>
- #include <boost/range/algorithm_ext.hpp>
- #include <boost/range/begin.hpp>
- #include <boost/range/end.hpp>
- #include <boost/test/test_tools.hpp>
- #include <boost/test/unit_test.hpp>
- #include <vector>
- namespace boost
- {
- // Test an integer range with a step size of 1.
- template<typename Integer>
- void test_irange_impl(Integer last)
- {
- std::vector<Integer> reference;
- for (Integer i = static_cast<Integer>(0); i < last; ++i)
- {
- reference.push_back(i);
- }
- std::vector<Integer> test;
- boost::push_back(test, boost::irange(last));
- BOOST_CHECK_EQUAL_COLLECTIONS( test.begin(), test.end(),
- reference.begin(), reference.end() );
- }
- // Test an integer range with a step size of 1.
- template<typename Integer>
- void test_irange_impl(Integer first, Integer last)
- {
- std::vector<Integer> reference;
- for (Integer i = first; i < last; ++i)
- {
- reference.push_back(i);
- }
- std::vector<Integer> test;
- boost::push_back(test, boost::irange(first, last));
- BOOST_CHECK_EQUAL_COLLECTIONS( test.begin(), test.end(),
- reference.begin(), reference.end() );
- }
- // Test an integer range with a runtime specified step size.
- template<typename Integer, typename IntegerInput>
- void test_irange_impl(IntegerInput first, IntegerInput last, int step)
- {
- BOOST_ASSERT( step != 0 );
- // Skip tests that have negative values if the type is
- // unsigned
- if ((static_cast<IntegerInput>(static_cast<Integer>(first)) != first)
- || (static_cast<IntegerInput>(static_cast<Integer>(last)) != last))
- return;
- std::vector<Integer> reference;
- const std::ptrdiff_t first_p = static_cast<std::ptrdiff_t>(first);
- const std::ptrdiff_t last_p = static_cast<std::ptrdiff_t>(last);
- const std::ptrdiff_t step_p = static_cast<std::ptrdiff_t>(step);
- for (std::ptrdiff_t current_value = first_p;
- step_p >= 0 ? current_value < last_p : current_value > last_p;
- current_value += step_p)
- reference.push_back(current_value);
- std::vector<Integer> test;
- boost::push_back(test, boost::irange(first, last, step));
- BOOST_CHECK_EQUAL_COLLECTIONS( test.begin(), test.end(),
- reference.begin(), reference.end() );
- }
- // Test driver function that for an integer range [first, last)
- // drives the test implementation through various integer
- // types.
- void test_irange(int last)
- {
- test_irange_impl<signed char>(last);
- test_irange_impl<unsigned char>(last);
- test_irange_impl<signed short>(last);
- test_irange_impl<unsigned short>(last);
- test_irange_impl<signed int>(last);
- test_irange_impl<unsigned int>(last);
- test_irange_impl<signed long>(last);
- test_irange_impl<unsigned long>(last);
- }
- // Test driver function that for an integer range [first, last)
- // drives the test implementation through various integer
- // types.
- void test_irange(int first, int last)
- {
- test_irange_impl<signed char>(first,last);
- test_irange_impl<unsigned char>(first, last);
- test_irange_impl<signed short>(first, last);
- test_irange_impl<unsigned short>(first, last);
- test_irange_impl<signed int>(first, last);
- test_irange_impl<unsigned int>(first, last);
- test_irange_impl<signed long>(first, last);
- test_irange_impl<unsigned long>(first, last);
- }
- // Test driver function that for an integer range [first, last)
- // drives the test implementation through various integer
- // types step_size items at a time.
- void test_irange(int first, int last, int step_size)
- {
- BOOST_ASSERT( step_size != 0 );
- test_irange_impl<signed char>(first, last, step_size);
- test_irange_impl<unsigned char>(first, last, step_size);
- test_irange_impl<signed short>(first, last, step_size);
- test_irange_impl<unsigned short>(first, last, step_size);
- test_irange_impl<signed int>(first, last, step_size);
- test_irange_impl<unsigned int>(first, last, step_size);
- test_irange_impl<signed long>(first, last, step_size);
- test_irange_impl<unsigned long>(first, last, step_size);
- }
- // Implementation of the unit test for the integer range
- // function.
- // This starts the test drivers to drive a set of integer types
- // for a combination of range values chosen to exercise a large
- // number of implementation branches.
- void irange_unit_test()
- {
- // Test the single-step version of irange(last)
- test_irange(0);
- test_irange(1);
- test_irange(10);
- // Test the single-step version of irange(first, last)
- test_irange(0, 0);
- test_irange(0, 1);
- test_irange(0, 10);
- test_irange(1, 1);
- test_irange(1, 2);
- test_irange(1, 11);
- // Test the n-step version of irange(first, last, step-size)
- test_irange(0, 0, 1);
- test_irange(0, 0, -1);
- test_irange(0, 10, 1);
- test_irange(10, 0, -1);
- test_irange(0, 2, 2);
- test_irange(2, 0, -2);
- test_irange(0, 9, 2);
- test_irange(9, 0, -2);
- test_irange(-9, 0, 2);
- test_irange(-9, 9, 2);
- test_irange(9, -9, -2);
- test_irange(10, 20, 5);
- test_irange(20, 10, -5);
- test_irange(0, 0, 3);
- test_irange(0, 1, 3);
- test_irange(0, 2, 3);
- test_irange(0, 3, 3);
- test_irange(0, 4, 3);
- test_irange(0, 10, 3);
- test_irange(0, 0, -3);
- test_irange(0, -1, -3);
- test_irange(0, -2, -3);
- test_irange(0, -3, -3);
- test_irange(0, -4, -3);
- test_irange(0, -10, -3);
- }
- } // namespace boost
- boost::unit_test::test_suite*
- init_unit_test_suite(int argc, char* argv[])
- {
- boost::unit_test::test_suite* test
- = BOOST_TEST_SUITE( "RangeTestSuite.irange" );
- test->add(BOOST_TEST_CASE( &boost::irange_unit_test ));
- return test;
- }
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