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/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. You may not use this file except in compliance with the License.
*
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Copyright (C) 2017 ScyllaDB
*/
#define BOOST_TEST_MODULE core
#include <seastar/util/tuple_utils.hh>
#include <boost/test/included/unit_test.hpp>
#include <sstream>
#include <type_traits>
using namespace seastar;
BOOST_AUTO_TEST_CASE(map) {
const auto pairs = tuple_map(std::make_tuple(10, 5.5, true), [](auto&& e) { return std::make_tuple(e, e); });
BOOST_REQUIRE(pairs == std::make_tuple(std::make_tuple(10, 10),
std::make_tuple(5.5, 5.5),
std::make_tuple(true, true)));
}
BOOST_AUTO_TEST_CASE(for_each) {
std::ostringstream os;
tuple_for_each(std::make_tuple('a', 10, false, 5.4), [&os](auto&& e) {
os << e;
});
BOOST_REQUIRE_EQUAL(os.str(), "a1005.4");
}
namespace {
template <typename T>
struct transform_type final {
using type = T;
};
template <>
struct transform_type<bool> final { using type = int; };
template <>
struct transform_type<double> final { using type = char; };
}
BOOST_AUTO_TEST_CASE(map_types) {
using before_tuple = std::tuple<double, bool, const char*>;
using after_tuple = typename tuple_map_types<transform_type, before_tuple>::type;
BOOST_REQUIRE((std::is_same<after_tuple, std::tuple<char, int, const char*>>::value));
}
namespace {
//
// Strip all `bool` fields.
//
template <typename>
struct keep_type final {
static constexpr auto value = true;
};
template <>
struct keep_type<bool> final {
static constexpr auto value = false;
};
}
BOOST_AUTO_TEST_CASE(filter_by_type) {
using before_tuple = std::tuple<bool, int, bool, double, bool, char>;
const auto t = tuple_filter_by_type<keep_type>(before_tuple{true, 10, false, 5.5, true, 'a'});
using filtered_type = typename std::decay<decltype(t)>::type;
BOOST_REQUIRE((std::is_same<filtered_type, std::tuple<int, double, char>>::value));
BOOST_REQUIRE(t == std::make_tuple(10, 5.5, 'a'));
}
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