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/**
* MIT License
*
* Copyright (c) 2017 Thibaut Goetghebuer-Planchon <tessil@gmx.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <tsl/sparse_growth_policy.h>
#include <boost/mpl/list.hpp>
#include <boost/test/unit_test.hpp>
#include <cstddef>
#include <limits>
#include <ratio>
#include <stdexcept>
#include "utils.h"
BOOST_AUTO_TEST_SUITE(test_policy)
using test_types =
boost::mpl::list<tsl::sh::power_of_two_growth_policy<2>,
tsl::sh::power_of_two_growth_policy<4>,
tsl::sh::prime_growth_policy, tsl::sh::mod_growth_policy<>,
tsl::sh::mod_growth_policy<std::ratio<7, 2>>>;
BOOST_AUTO_TEST_CASE_TEMPLATE(test_policy, Policy, test_types) {
// Call next_bucket_count() on the policy until we reach its
// max_bucket_count()
std::size_t bucket_count = 0;
Policy policy(bucket_count);
BOOST_CHECK_EQUAL(policy.bucket_for_hash(0), 0);
BOOST_CHECK_EQUAL(bucket_count, 0);
#if !TSL_NO_EXCEPTIONS
bool exception_thrown = false;
try {
while (true) {
const std::size_t previous_bucket_count = bucket_count;
bucket_count = policy.next_bucket_count();
policy = Policy(bucket_count);
BOOST_CHECK_EQUAL(policy.bucket_for_hash(0), 0);
BOOST_CHECK(bucket_count > previous_bucket_count);
}
} catch (const std::length_error&) {
exception_thrown = true;
}
BOOST_CHECK(exception_thrown);
#endif
}
BOOST_AUTO_TEST_CASE_TEMPLATE(test_policy_min_bucket_count, Policy,
test_types) {
// Check policy when a bucket_count of 0 is asked.
std::size_t bucket_count = 0;
Policy policy(bucket_count);
BOOST_CHECK_EQUAL(policy.bucket_for_hash(0), 0);
}
BOOST_AUTO_TEST_CASE_TEMPLATE(test_policy_max_bucket_count, Policy,
test_types) {
// Test a bucket_count equals to the max_bucket_count limit and above
std::size_t bucket_count = 0;
Policy policy(bucket_count);
bucket_count = policy.max_bucket_count();
Policy policy2(bucket_count);
bucket_count = std::numeric_limits<std::size_t>::max();
TSL_SH_CHECK_THROW((Policy(bucket_count)), std::length_error);
bucket_count = policy.max_bucket_count() + 1;
TSL_SH_CHECK_THROW((Policy(bucket_count)), std::length_error);
}
BOOST_AUTO_TEST_SUITE_END()
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