Ichthyostega
9c0fa7139d
...using the std::exception_ptr and helpers, we can now reliably transport any exception object as the »right« value of the »Either«
107 lines
3 KiB
C++
107 lines
3 KiB
C++
/*
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Result(Test) - verify the either-result-or-failure intermediary wrapper
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Copyright (C) Lumiera.org
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2023, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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/** @file result-test.cpp
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** unit test \ref Result_test
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*/
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#include "lib/test/run.hpp"
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#include "lib/test/test-helper.hpp"
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#include "lib/result.hpp"
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#include "lib/util.hpp"
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#include <cstdlib>
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namespace lib {
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namespace test{
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using util::isSameObject;
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using std::rand;
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namespace error = lumiera::error;
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using error::LUMIERA_ERROR_FATAL;
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namespace {
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const Literal THE_END = "all dead and hero got the girl";
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#define Type(_EXPR_) lib::test::showType<decltype(_EXPR_)>()
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}
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/***********************************************************************************//**
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* @test Verify an intermediary »Either« type, to embody either a successful result,
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* or document a failure with encountered exception.
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* @see result.hpp
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* @see lib::ThreadJoinable usage example
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*/
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class Result_test
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: public Test
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{
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void
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run (Arg)
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{
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auto happy = Result{THE_END};
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CHECK (happy == THE_END);
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CHECK (happy.isValid());
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CHECK (true == happy);
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happy.maybeThrow(); // still alive...
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CHECK (Type(happy) == "Result<Literal const&>"_expect);
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// Note type deduction: RValue moved into the Result...
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auto sequel = Result{Literal{THE_END}};
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CHECK (sequel.isValid());
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CHECK (Type(sequel) == "Result<Literal>"_expect);
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CHECK ( isSameObject (happy.get<Literal const&>(), THE_END));
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CHECK (not isSameObject (sequel.get<Literal const&>(), THE_END));
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// »Either Right« case : mark as failure
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Result<double> facepalm{error::Fatal("zOMG")};
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CHECK (not facepalm.isValid());
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VERIFY_ERROR (FATAL, (double)facepalm );
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VERIFY_ERROR (FATAL, facepalm.get<double&>());
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VERIFY_ERROR (FATAL, facepalm.maybeThrow() );
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CHECK (42.0 == facepalm.getOrElse([]{ return 42; }));
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}
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};
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/** Register this test class... */
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LAUNCHER (Result_test, "unit common");
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}} // namespace lib::test
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