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// Copyright (C) 2021-2022 Joel Rosdahl and other contributors
//
// See doc/AUTHORS.adoc for a complete list of contributors.
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along with
// this program; if not, write to the Free Software Foundation, Inc., 51
// Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#include <util/expected.hpp>
#include <third_party/doctest.h>
#include <third_party/nonstd/expected.hpp>
#include <iostream> // macOS bug: https://github.com/onqtam/doctest/issues/126
#include <memory>
#include <stdexcept>
#include <string>
class TestException : public std::runtime_error
{
using std::runtime_error::runtime_error;
};
TEST_CASE("util::value_or_throw")
{
using util::throw_on_error;
using util::value_or_throw;
SUBCASE("const ref")
{
const nonstd::expected<int, const char*> with_value = 42;
const nonstd::expected<int, const char*> with_error =
nonstd::make_unexpected("no value");
CHECK(value_or_throw<TestException>(with_value) == 42);
CHECK_THROWS_WITH(value_or_throw<TestException>(with_error), "no value");
}
SUBCASE("move")
{
const std::string value = "value";
nonstd::expected<std::unique_ptr<std::string>, const char*> with_value =
std::make_unique<std::string>(value);
const nonstd::expected<int, const char*> with_error =
nonstd::make_unexpected("no value");
CHECK(*value_or_throw<TestException>(std::move(with_value)) == value);
CHECK_THROWS_WITH(value_or_throw<TestException>(std::move(with_error)),
"no value");
}
SUBCASE("const ref with prefix")
{
const nonstd::expected<int, const char*> with_value = 42;
const nonstd::expected<int, const char*> with_error =
nonstd::make_unexpected("no value");
CHECK(value_or_throw<TestException>(with_value, "prefix: ") == 42);
CHECK_THROWS_WITH(value_or_throw<TestException>(with_error, "prefix: "),
"prefix: no value");
}
SUBCASE("move with prefix")
{
const std::string value = "value";
nonstd::expected<std::unique_ptr<std::string>, const char*> with_value =
std::make_unique<std::string>(value);
const nonstd::expected<int, const char*> with_error =
nonstd::make_unexpected("no value");
CHECK(*value_or_throw<TestException>(std::move(with_value), "prefix: ")
== value);
CHECK_THROWS_WITH(
value_or_throw<TestException>(std::move(with_error), "prefix: "),
"prefix: no value");
}
SUBCASE("void T::value_type")
{
const nonstd::expected<void, const char*> without_error;
const nonstd::expected<void, const char*> with_error =
nonstd::make_unexpected("no value");
CHECK_NOTHROW(throw_on_error<TestException>(without_error));
CHECK_THROWS_WITH(throw_on_error<TestException>(with_error), "no value");
}
SUBCASE("void T::value_type with prefix")
{
const nonstd::expected<void, const char*> without_error;
const nonstd::expected<void, const char*> with_error =
nonstd::make_unexpected("no value");
CHECK_NOTHROW(throw_on_error<TestException>(without_error, "prefix: "));
CHECK_THROWS_WITH(throw_on_error<TestException>(with_error, "prefix: "),
"prefix: no value");
}
}
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