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// Copyright (c) 2012-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <limitedmap.h>
#include <test/setup_common.h>
#include <boost/test/unit_test.hpp>
BOOST_FIXTURE_TEST_SUITE(limitedmap_tests, BasicTestingSetup)
BOOST_AUTO_TEST_CASE(limitedmap_test)
{
// create a limitedmap capped at 10 items
limitedmap<int, int> map(10);
// check that the max size is 10
BOOST_CHECK(map.max_size() == 10);
// check that it's empty
BOOST_CHECK(map.size() == 0);
// insert (-1, -1)
map.insert(std::pair<int, int>(-1, -1));
// make sure that the size is updated
BOOST_CHECK(map.size() == 1);
// make sure that the new item is in the map
BOOST_CHECK(map.count(-1) == 1);
// insert 10 new items
for (int i = 0; i < 10; i++) {
map.insert(std::pair<int, int>(i, i + 1));
}
// make sure that the map now contains 10 items...
BOOST_CHECK(map.size() == 10);
// ...and that the first item has been discarded
BOOST_CHECK(map.count(-1) == 0);
// iterate over the map, both with an index and an iterator
limitedmap<int, int>::const_iterator it = map.begin();
for (int i = 0; i < 10; i++) {
// make sure the item is present
BOOST_CHECK(map.count(i) == 1);
// use the iterator to check for the expected key and value
BOOST_CHECK(it->first == i);
BOOST_CHECK(it->second == i + 1);
// use find to check for the value
BOOST_CHECK(map.find(i)->second == i + 1);
// update and recheck
map.update(it, i + 2);
BOOST_CHECK(map.find(i)->second == i + 2);
it++;
}
// check that we've exhausted the iterator
BOOST_CHECK(it == map.end());
// resize the map to 5 items
map.max_size(5);
// check that the max size and size are now 5
BOOST_CHECK(map.max_size() == 5);
BOOST_CHECK(map.size() == 5);
// check that items less than 5 have been discarded
// and items greater than 5 are retained
for (int i = 0; i < 10; i++) {
if (i < 5) {
BOOST_CHECK(map.count(i) == 0);
} else {
BOOST_CHECK(map.count(i) == 1);
}
}
// erase some items not in the map
for (int i = 100; i < 1000; i += 100) {
map.erase(i);
}
// check that the size is unaffected
BOOST_CHECK(map.size() == 5);
// erase the remaining elements
for (int i = 5; i < 10; i++) {
map.erase(i);
}
// check that the map is now empty
BOOST_CHECK(map.empty());
}
BOOST_AUTO_TEST_SUITE_END()
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