91 lines
3.3 KiB
C++
91 lines
3.3 KiB
C++
/* Unit testing for outcomes
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(C) 2013-2019 Niall Douglas <http://www.nedproductions.biz/> (7 commits)
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Boost Software License - Version 1.0 - August 17th, 2003
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#include <boost/outcome/outcome.hpp>
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#include <boost/outcome/try.hpp>
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#include <boost/test/unit_test.hpp>
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#include <boost/test/unit_test_monitor.hpp>
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BOOST_OUTCOME_AUTO_TEST_CASE(works_outcome_propagate, "Tests that the outcome propagates errors between different editions of itself")
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{
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using namespace BOOST_OUTCOME_V2_NAMESPACE;
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{
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auto t0 = [&](int a) { return result<long>(boost::system::error_code(a, boost::system::generic_category())); };
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auto t1 = [&](int a) {
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result<double> f(t0(a)); // double is constructible from long
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BOOST_CHECK(!f.has_value());
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BOOST_CHECK(f.has_error());
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return f;
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};
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auto t2 = [&](int a) {
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result<void> f(t1(a).error());
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BOOST_CHECK(!f.has_value());
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BOOST_CHECK(f.has_error());
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return f;
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};
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auto t3 = [&](int a) {
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outcome<std::string> f(t2(a));
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BOOST_CHECK(!f.has_value());
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BOOST_CHECK(f.has_error());
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return f;
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};
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BOOST_CHECK(t3(5).error().value() == 5);
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result<int> a2{result<void>(in_place_type<void>)};
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result<int> a3{result<void>(boost::system::error_code(5, boost::system::generic_category()))};
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BOOST_CHECK(a2.has_value());
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BOOST_CHECK(!a2.has_error());
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BOOST_CHECK(!a3.has_value());
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BOOST_CHECK(a3.has_error());
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}
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{
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auto t0 = [&](int a) { return result<long>(a); };
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auto t1 = [&](int a) -> result<std::string> {
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BOOST_OUTCOME_TRY(f, (t0(a)));
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return std::to_string(f);
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};
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BOOST_CHECK(t1(5).value() == "5");
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}
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{
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auto t0 = [&](int a) { return result<long>(a); };
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auto t1 = [&](int a) -> outcome<std::string> {
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BOOST_OUTCOME_TRY(f, (t0(a)));
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return std::to_string(f);
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};
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BOOST_CHECK(t1(5).value() == "5");
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}
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{
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auto t0 = [&](int a) -> result<long> { return result<long>(a); };
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auto t1 = [&](int a) -> outcome<void> {
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BOOST_OUTCOME_TRY((t0(a)));
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return outcome<void>(in_place_type<void>);
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};
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(void) t1(5);
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}
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}
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