263 lines
6.7 KiB
C++
263 lines
6.7 KiB
C++
/*
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* Copyright 2020-2022 Max Kellermann <max.kellermann@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "util/IntrusiveList.hxx"
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#include "util/SortList.hxx"
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#include <gtest/gtest.h>
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#include <string>
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namespace {
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template<typename Hook>
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struct CharItem final : Hook {
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char ch;
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constexpr CharItem(char _ch) noexcept:ch(_ch) {}
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};
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template<typename Hook>
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static std::string
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ToString(const IntrusiveList<CharItem<Hook>> &list,
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typename IntrusiveList<CharItem<Hook>>::const_iterator it,
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std::size_t n) noexcept
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{
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std::string result;
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for (std::size_t i = 0; i < n; ++i, ++it)
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result.push_back(it == list.end() ? '_' : it->ch);
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return result;
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}
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template<typename Hook>
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static std::string
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ToStringReverse(const IntrusiveList<CharItem<Hook>> &list,
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typename IntrusiveList<CharItem<Hook>>::const_iterator it,
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std::size_t n) noexcept
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{
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std::string result;
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for (std::size_t i = 0; i < n; ++i, --it)
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result.push_back(it == list.end() ? '_' : it->ch);
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return result;
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}
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} // anonymous namespace
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TEST(IntrusiveList, Basic)
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{
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using Item = CharItem<IntrusiveListHook>;
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Item items[]{'a', 'b', 'c'};
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IntrusiveList<Item> list;
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for (auto &i : items)
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list.push_back(i);
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ASSERT_EQ(ToString(list, list.begin(), 5), "abc_a");
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ASSERT_EQ(ToStringReverse(list, list.begin(), 5), "a_cba");
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items[1].unlink();
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ASSERT_EQ(ToString(list, list.begin(), 4), "ac_a");
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ASSERT_EQ(ToStringReverse(list, list.begin(), 4), "a_ca");
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IntrusiveList<Item> other_list;
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Item other_items[]{'d', 'e', 'f', 'g'};
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for (auto &i : other_items)
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other_list.push_back(i);
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list.splice(std::next(list.begin()), other_list,
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other_list.iterator_to(other_items[1]),
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other_list.iterator_to(other_items[3]), 2);
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ASSERT_EQ(ToString(other_list, other_list.begin(), 4), "dg_d");
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ASSERT_EQ(ToStringReverse(other_list, other_list.begin(), 4), "d_gd");
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ASSERT_EQ(ToString(list, list.begin(), 6), "aefc_a");
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ASSERT_EQ(ToStringReverse(list, list.begin(), 6), "a_cfea");
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}
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TEST(IntrusiveList, SafeLink)
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{
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using Item = CharItem<SafeLinkIntrusiveListHook>;
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Item items[]{'a', 'b', 'c'};
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for (const auto &i : items)
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ASSERT_FALSE(i.is_linked());
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IntrusiveList<Item> list;
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list.push_back(items[1]);
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list.push_back(items[2]);
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list.push_front(items[0]);
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for (const auto &i : items)
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ASSERT_TRUE(i.is_linked());
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ASSERT_EQ(ToString(list, list.begin(), 5), "abc_a");
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ASSERT_EQ(ToStringReverse(list, list.begin(), 5), "a_cba");
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items[1].unlink();
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ASSERT_TRUE(items[0].is_linked());
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ASSERT_FALSE(items[1].is_linked());
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ASSERT_TRUE(items[2].is_linked());
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ASSERT_EQ(ToString(list, list.begin(), 4), "ac_a");
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ASSERT_EQ(ToStringReverse(list, list.begin(), 4), "a_ca");
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list.erase(list.iterator_to(items[0]));
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ASSERT_FALSE(items[0].is_linked());
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ASSERT_FALSE(items[1].is_linked());
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ASSERT_TRUE(items[2].is_linked());
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ASSERT_EQ(ToString(list, list.begin(), 3), "c_c");
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ASSERT_EQ(ToStringReverse(list, list.begin(), 3), "c_c");
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list.clear();
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ASSERT_FALSE(items[0].is_linked());
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ASSERT_FALSE(items[1].is_linked());
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ASSERT_FALSE(items[2].is_linked());
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ASSERT_EQ(ToString(list, list.begin(), 2), "__");
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ASSERT_EQ(ToStringReverse(list, list.begin(), 2), "__");
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{
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IntrusiveList<Item> list2;
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list2.push_back(items[0]);
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ASSERT_TRUE(items[0].is_linked());
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}
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ASSERT_FALSE(items[0].is_linked());
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}
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TEST(IntrusiveList, AutoUnlink)
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{
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using Item = CharItem<AutoUnlinkIntrusiveListHook>;
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Item a{'a'};
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ASSERT_FALSE(a.is_linked());
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IntrusiveList<Item> list;
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Item b{'b'};
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ASSERT_FALSE(b.is_linked());
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{
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Item c{'c'};
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list.push_back(a);
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list.push_back(b);
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list.push_back(c);
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ASSERT_TRUE(a.is_linked());
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ASSERT_TRUE(b.is_linked());
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ASSERT_TRUE(c.is_linked());
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ASSERT_EQ(ToString(list, list.begin(), 5), "abc_a");
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}
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ASSERT_EQ(ToString(list, list.begin(), 5), "ab_ab");
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ASSERT_TRUE(a.is_linked());
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ASSERT_TRUE(b.is_linked());
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}
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TEST(IntrusiveList, Merge)
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{
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using Item = CharItem<IntrusiveListHook>;
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const auto predicate = [](const Item &a, const Item &b){
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return a.ch < b.ch;
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};
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Item items[]{'c', 'k', 'u'};
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IntrusiveList<Item> list;
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for (auto &i : items)
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list.push_back(i);
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IntrusiveList<Item> other_list;
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Item other_items[]{'a', 'b', 'g', 'm', 'n', 'x', 'y', 'z'};
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for (auto &i : other_items)
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other_list.push_back(i);
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MergeList(list, other_list, predicate);
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ASSERT_EQ(ToString(list, list.begin(), 13), "abcgkmnuxyz_a");
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ASSERT_TRUE(other_list.empty());
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Item more_items[]{'a', 'o', 'p', 'q'};
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for (auto &i : more_items)
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other_list.push_back(i);
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MergeList(list, other_list, predicate);
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ASSERT_EQ(ToString(list, list.begin(), 17), "aabcgkmnopquxyz_a");
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ASSERT_EQ(&*list.begin(), &other_items[0]);
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ASSERT_EQ(&*std::next(list.begin()), &more_items[0]);
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}
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TEST(IntrusiveList, Sort)
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{
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using Item = CharItem<IntrusiveListHook>;
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const auto predicate = [](const Item &a, const Item &b){
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return a.ch < b.ch;
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};
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Item items[]{'z', 'a', 'b', 'q', 'b', 'c', 't', 'm', 'y'};
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IntrusiveList<Item> list;
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SortList(list, predicate);
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ASSERT_EQ(ToString(list, list.begin(), 2), "__");
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list.push_back(items[0]);
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SortList(list, predicate);
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ASSERT_EQ(ToString(list, list.begin(), 3), "z_z");
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list.push_back(items[1]);
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SortList(list, predicate);
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ASSERT_EQ(ToString(list, list.begin(), 4), "az_a");
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SortList(list, predicate);
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ASSERT_EQ(ToString(list, list.begin(), 4), "az_a");
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list.clear();
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for (auto &i : items)
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list.push_back(i);
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SortList(list, predicate);
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ASSERT_EQ(ToString(list, list.begin(), 11), "abbcmqtyz_a");
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ASSERT_EQ(&*std::next(list.begin(), 1), &items[2]);
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ASSERT_EQ(&*std::next(list.begin(), 2), &items[4]);
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}
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