mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
119 lines
2.7 KiB
C++
119 lines
2.7 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libsolutil/LazyInit.h>
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#include <boost/test/unit_test.hpp>
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#include <utility>
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namespace solidity::util::test
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{
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namespace
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{
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template<typename T>
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void assertInitCalled(LazyInit<T> lazyInit, bool target)
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{
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bool initCalled = false;
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lazyInit.init([&]{
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initCalled = true;
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return T();
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});
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BOOST_REQUIRE_EQUAL(initCalled, target);
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}
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// Take ownership to ensure that it doesn't "mutate"
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template<typename T>
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void assertNotEmpty(LazyInit<T> _lazyInit) { assertInitCalled(std::move(_lazyInit), false); }
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// Take ownership to ensure that it doesn't "mutate"
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template<typename T>
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void assertEmpty(LazyInit<T> _lazyInit) { assertInitCalled(std::move(_lazyInit), true); }
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template<typename T>
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T valueOf(LazyInit<T> _lazyInit)
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{
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return _lazyInit.init([&]{
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BOOST_REQUIRE(false); // this should never be called
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return T();
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});
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}
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}
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BOOST_AUTO_TEST_SUITE(LazyInitTests, *boost::unit_test::label("nooptions"))
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BOOST_AUTO_TEST_CASE(default_constructed_is_empty)
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{
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assertEmpty(LazyInit<int>());
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assertEmpty(LazyInit<int const>());
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}
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BOOST_AUTO_TEST_CASE(initialized_is_not_empty)
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{
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LazyInit<int> lazyInit;
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lazyInit.init([]{ return 12; });
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assertNotEmpty(std::move(lazyInit));
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}
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BOOST_AUTO_TEST_CASE(init_returns_init_value)
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{
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LazyInit<int> lazyInit;
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BOOST_CHECK_EQUAL(lazyInit.init([]{ return 12; }), 12);
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// A second call to init should not change the value
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BOOST_CHECK_EQUAL(lazyInit.init([]{ return 42; }), 12);
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}
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BOOST_AUTO_TEST_CASE(moved_from_is_empty)
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{
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{
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LazyInit<int> lazyInit;
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{ [[maybe_unused]] auto pilfered = std::move(lazyInit); }
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assertEmpty(std::move(lazyInit));
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}
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{
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LazyInit<int> lazyInit;
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lazyInit.init([]{ return 12; });
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{ [[maybe_unused]] auto pilfered = std::move(lazyInit); }
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assertEmpty(std::move(lazyInit));
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}
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}
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BOOST_AUTO_TEST_CASE(move_constructed_has_same_value_as_original)
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{
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LazyInit<int> original;
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original.init([]{ return 12; });
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LazyInit<int> moveConstructed = std::move(original);
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BOOST_CHECK_EQUAL(valueOf(std::move(moveConstructed)), 12);
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}
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BOOST_AUTO_TEST_SUITE_END()
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}
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