d748e7bbfc
Prior to this, an xrange always started at the begin term and incremented by 1 per step until it reached the end term. There was no support for a step size other than 1. Add support for custom step size. It is the caller's responsibility to pick a step size that will eventually lead to (iter != end) evaluating to false.
113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
#include "d_range.h"
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#include <vector>
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#define BOOST_TEST_DYN_LINK
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#define BOOST_TEST_MODULE Rebirth xrange
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#include <boost/test/unit_test.hpp>
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/* Test that an xrange is empty when the ending bound is 0.
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*/
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BOOST_AUTO_TEST_CASE(xrange_empty_0)
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{
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bool empty = true;
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for (auto &&v : xrange(0u))
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{
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(void)v;
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empty = false;
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}
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BOOST_TEST(empty);
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}
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/* Test that an xrange is empty when the start is higher than the end.
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*/
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BOOST_AUTO_TEST_CASE(xrange_empty_transposed)
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{
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bool empty = true;
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for (auto &&v : xrange(2u, 1u))
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{
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(void)v;
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empty = false;
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}
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BOOST_TEST(empty);
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}
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/* Test that an xrange produces the correct number of entries.
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*/
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BOOST_AUTO_TEST_CASE(xrange_length)
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{
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unsigned count = 0;
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constexpr unsigned length = 4u;
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for (auto &&v : xrange(length))
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{
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(void)v;
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++ count;
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}
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BOOST_TEST(count == length);
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}
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/* Test that an xrange produces the correct values when using an implied
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* start of 0.
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*/
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BOOST_AUTO_TEST_CASE(xrange_contents)
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{
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std::vector<unsigned> out;
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for (auto &&v : xrange(4u))
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out.emplace_back(v);
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std::vector<unsigned> expected{0, 1, 2, 3};
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BOOST_TEST(out == expected);
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}
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/* Test that an xrange produces the correct values when using an
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* explicit start.
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*/
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BOOST_AUTO_TEST_CASE(xrange_contents_start)
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{
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std::vector<unsigned> out;
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for (auto &&v : xrange(2u, 4u))
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out.emplace_back(v);
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std::vector<unsigned> expected{2, 3};
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BOOST_TEST(out == expected);
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}
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/* Test that an xrange produces the correct values when stepping up
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* with skipped values.
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*/
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BOOST_AUTO_TEST_CASE(xrange_contents_start_up_2)
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{
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std::vector<unsigned> out;
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for (auto &&v : xrange(std::integral_constant<unsigned, 2u>(), std::integral_constant<unsigned, 6u>(), std::integral_constant<int, 2>()))
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out.emplace_back(v);
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std::vector<unsigned> expected{2, 4};
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BOOST_TEST(out == expected);
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}
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BOOST_AUTO_TEST_CASE(xrange_contents_descending)
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{
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std::vector<unsigned> out;
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for (auto &&v : xrange(std::integral_constant<unsigned, 4u>(), std::integral_constant<unsigned, 2u>(), xrange_descending()))
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out.emplace_back(v);
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std::vector<unsigned> expected{4, 3};
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BOOST_TEST(out == expected);
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}
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/* Test that an xrange produces the correct values when stepping down
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* with skipped values.
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*/
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BOOST_AUTO_TEST_CASE(xrange_contents_start_down_2_constant)
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{
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std::vector<unsigned> out;
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for (auto &&v : xrange(std::integral_constant<unsigned, 5u>(), std::integral_constant<unsigned, 1u>(), std::integral_constant<int, -2>()))
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out.emplace_back(v);
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std::vector<unsigned> expected{5, 3};
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BOOST_TEST(out == expected);
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}
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BOOST_AUTO_TEST_CASE(xrange_contents_start_down_variable)
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{
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std::vector<unsigned> out;
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for (auto &&v : xrange(5u, std::integral_constant<unsigned, 2u>(), xrange_descending()))
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out.emplace_back(v);
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std::vector<unsigned> expected{5, 4, 3};
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BOOST_TEST(out == expected);
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}
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