coroeithertest.cpp

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/

#include "coroeithertest.h"
#include <QtTest>
#include <util/sll/qtutil.h>
#include <util/threads/coro.h>
#include <util/threads/coro/eithercoro.h>

QTEST_GUILESS_MAIN (LC::Util::CoroEitherTest)

namespace LC::Util
{
    using Ty = Either<char, int>;

    void CoroEitherTest::testSuccess ()
    {
        auto action = [] -> Ty
        {
            auto n = co_await Ty { 3 };
            auto m = co_await Ty { 5 };
            co_return n * m;
        };
        QCOMPARE (action (), 15);
    }

    void CoroEitherTest::testFailure ()
    {
        auto action = [] -> Ty
        {
            auto m = co_await Ty { 3 };
            auto n = co_await Ty { AsLeft, 'a' };
            auto k = co_await Ty { AsLeft, 'b' };
            co_return n * m * k;
        };
        QCOMPARE (action (), (Ty { AsLeft, 'a' }));
    }

    void CoroEitherTest::testException ()
    {
        auto action = [] -> Ty
        {
            auto m = co_await Ty { 3 };
            auto n = co_await [] -> Ty { throw std::runtime_error { "err" }; } ();
            auto k = co_await Ty { AsLeft, 'a' };
            co_return n * m * k;
        };
        QVERIFY_THROWS_EXCEPTION (std::runtime_error, action ());
    }

    void CoroEitherTest::testSuccessAllocating ()
    {
        using AllocTy = Either<QByteArray, QString>;

        auto action = [] -> AllocTy
        {
            const auto& s1 = co_await AllocTy { QString { "foo" } };
            const auto& s2 = co_await AllocTy { QString { "bar" } };
            co_return s1 + s2;
        };
        QCOMPARE (action (), "foobar"_qs);
    }
}