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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 2016 ScyllaDB
*/
#define BOOST_TEST_MODULE core
#include <boost/test/included/unit_test.hpp>
#include <seastar/core/weak_ptr.hh>
using namespace seastar;
class myclass : public weakly_referencable<myclass> {};
static_assert(std::is_nothrow_default_constructible_v<myclass>);
static_assert(std::is_nothrow_default_constructible_v<weak_ptr<myclass>>);
static_assert(std::is_nothrow_move_constructible_v<weak_ptr<myclass>>);
BOOST_AUTO_TEST_CASE(test_weak_ptr_is_empty_when_default_initialized) {
weak_ptr<myclass> wp;
BOOST_REQUIRE(!bool(wp));
}
BOOST_AUTO_TEST_CASE(test_weak_ptr_is_reset) {
auto owning_ptr = std::make_unique<myclass>();
weak_ptr<myclass> wp = owning_ptr->weak_from_this();
BOOST_REQUIRE(bool(wp));
BOOST_REQUIRE(&*wp == &*owning_ptr);
owning_ptr = {};
BOOST_REQUIRE(!bool(wp));
}
BOOST_AUTO_TEST_CASE(test_weak_ptr_can_be_moved) {
auto owning_ptr = std::make_unique<myclass>();
weak_ptr<myclass> wp1 = owning_ptr->weak_from_this();
weak_ptr<myclass> wp2 = owning_ptr->weak_from_this();
weak_ptr<myclass> wp3 = owning_ptr->weak_from_this();
auto wp3_moved = std::move(wp3);
auto wp1_moved = std::move(wp1);
auto wp2_moved = std::move(wp2);
BOOST_REQUIRE(!bool(wp1));
BOOST_REQUIRE(!bool(wp2));
BOOST_REQUIRE(!bool(wp3));
BOOST_REQUIRE(bool(wp1_moved));
BOOST_REQUIRE(bool(wp2_moved));
BOOST_REQUIRE(bool(wp3_moved));
owning_ptr = {};
BOOST_REQUIRE(!bool(wp1_moved));
BOOST_REQUIRE(!bool(wp2_moved));
BOOST_REQUIRE(!bool(wp3_moved));
}
BOOST_AUTO_TEST_CASE(test_multipe_weak_ptrs) {
auto owning_ptr = std::make_unique<myclass>();
weak_ptr<myclass> wp1 = owning_ptr->weak_from_this();
BOOST_REQUIRE(bool(wp1));
BOOST_REQUIRE(&*wp1 == &*owning_ptr);
weak_ptr<myclass> wp2 = owning_ptr->weak_from_this();
BOOST_REQUIRE(bool(wp2));
BOOST_REQUIRE(&*wp2 == &*owning_ptr);
owning_ptr = {};
BOOST_REQUIRE(!bool(wp1));
BOOST_REQUIRE(!bool(wp2));
}
BOOST_AUTO_TEST_CASE(test_multipe_weak_ptrs_going_away_first) {
auto owning_ptr = std::make_unique<myclass>();
weak_ptr<myclass> wp1 = owning_ptr->weak_from_this();
weak_ptr<myclass> wp2 = owning_ptr->weak_from_this();
weak_ptr<myclass> wp3 = owning_ptr->weak_from_this();
BOOST_REQUIRE(bool(wp1));
BOOST_REQUIRE(bool(wp2));
BOOST_REQUIRE(bool(wp3));
wp2 = {};
owning_ptr = std::make_unique<myclass>();
BOOST_REQUIRE(!bool(wp1));
BOOST_REQUIRE(!bool(wp2));
BOOST_REQUIRE(!bool(wp3));
wp1 = owning_ptr->weak_from_this();
wp2 = owning_ptr->weak_from_this();
wp3 = owning_ptr->weak_from_this();
BOOST_REQUIRE(bool(wp1));
BOOST_REQUIRE(bool(wp2));
BOOST_REQUIRE(bool(wp3));
wp3 = {};
owning_ptr = std::make_unique<myclass>();
BOOST_REQUIRE(!bool(wp1));
BOOST_REQUIRE(!bool(wp2));
BOOST_REQUIRE(!bool(wp3));
wp1 = owning_ptr->weak_from_this();
wp2 = owning_ptr->weak_from_this();
wp3 = owning_ptr->weak_from_this();
wp1 = {};
wp3 = {};
owning_ptr = std::make_unique<myclass>();
BOOST_REQUIRE(!bool(wp1));
BOOST_REQUIRE(!bool(wp2));
BOOST_REQUIRE(!bool(wp3));
}
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