91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2019 Danny Robson <danny@nerdcruft.net>
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*/
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#include <cruft/util/list/sort.hpp>
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#include <cruft/util/random.hpp>
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#include <cruft/util/rand/generic.hpp>
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#include <cruft/util/tap.hpp>
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#include <cruft/util/iterator/zip.hpp>
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#include <list>
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#include <vector>
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#include <algorithm>
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///////////////////////////////////////////////////////////////////////////////
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template <typename ...ArgsT>
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static void
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test_sort (
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cruft::TAP::logger &tap,
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std::vector<int> &&data,
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fmt::format_string<ArgsT...> fmt,
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ArgsT&&...args
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) {
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// Pre-allocate the array so that we don't get caught by pointer
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// invalidation as we build the nodes.
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std::vector<
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cruft::list::node::compound<int>
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> nodes (data.size ());
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// Build the list and fold in the supplied data.
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for (auto [node, value]: cruft::iterator::zip (nodes, data)) {
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node.next = &node + 1;
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node.data = value;
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}
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nodes.back ().next = nullptr;
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// Actually do the sort and test the result.
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auto head = cruft::list::sort (
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&nodes.front (),
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&nodes.back ()
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);
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tap.expect (
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cruft::list::is_sorted (head),
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fmt,
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std::forward<ArgsT> (args)...
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);
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}
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//-----------------------------------------------------------------------------
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int main ()
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{
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cruft::TAP::logger tap;
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// Try sorting a 'large' array of unique, but shuffled, contiguous integers.
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{
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// Don't use a power of two here. It won't exercise any edge cases in
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// the splitting logic of some sorts (like merge).
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static constexpr int COUNT = 500'000;
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// Create a list of randomly distributed integers. Use a constant seed so
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// we don't get randomised test results.
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std::vector<int> data (COUNT);
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std::iota (std::begin (data), std::end (data), 0);
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std::shuffle (
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std::begin (data),
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std::end (data),
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cruft::rand::general_generator {COUNT}
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);
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test_sort (tap, std::move (data), "sorting large unique and shuffled array");
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}
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// Try sorting a small array with identical elements
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{
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static constexpr int COUNT = 15;
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std::vector<int> data (COUNT, COUNT);
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test_sort (tap, std::move (data), "sorting small identical array");
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}
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return tap.status ();
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} |