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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/util/future.h"
#include "mongo/stdx/thread.h"
#include "mongo/unittest/death_test.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/future_test_utils.h"
namespace mongo {
namespace {
TEST(Promise, Success_setFrom) {
FUTURE_SUCCESS_TEST([] { return 1; },
[](Future<int>&& fut) {
auto pf = makePromiseFuture<int>();
pf.promise.setFrom(std::move(fut));
ASSERT_EQ(std::move(pf.future).get(), 1);
});
}
TEST(Promise, Fail_setFrom) {
FUTURE_FAIL_TEST<int>([](Future<int>&& fut) {
auto pf = makePromiseFuture<int>();
pf.promise.setFrom(std::move(fut));
ASSERT_THROWS_failStatus(std::move(pf.future).get());
});
}
TEST(Promise, Success_setWith_value) {
auto pf = makePromiseFuture<int>();
pf.promise.setWith([&] { return 1; });
ASSERT_EQ(std::move(pf.future).get(), 1);
}
TEST(Promise, Fail_setWith_throw) {
auto pf = makePromiseFuture<int>();
pf.promise.setWith([&] {
uassertStatusOK(failStatus());
return 1;
});
ASSERT_THROWS_failStatus(std::move(pf.future).get());
}
TEST(Promise, Success_setWith_StatusWith) {
auto pf = makePromiseFuture<int>();
pf.promise.setWith([&] { return StatusWith<int>(1); });
ASSERT_EQ(std::move(pf.future).get(), 1);
}
TEST(Promise, Fail_setWith_StatusWith) {
auto pf = makePromiseFuture<int>();
pf.promise.setWith([&] { return StatusWith<int>(failStatus()); });
ASSERT_THROWS_failStatus(std::move(pf.future).get());
}
TEST(Promise, Success_setWith_Future) {
FUTURE_SUCCESS_TEST([] { return 1; },
[](Future<int>&& fut) {
auto pf = makePromiseFuture<int>();
pf.promise.setWith([&] { return std::move(fut); });
ASSERT_EQ(std::move(pf.future).get(), 1);
});
}
TEST(Promise, Fail_setWith_Future) {
FUTURE_FAIL_TEST<int>([](Future<int>&& fut) {
auto pf = makePromiseFuture<int>();
pf.promise.setWith([&] { return std::move(fut); });
ASSERT_THROWS_failStatus(std::move(pf.future).get());
});
}
TEST(Promise, MoveAssignBreaksPromise) {
auto pf = makePromiseFuture<int>();
pf.promise = Promise<int>(); // This should break the promise.
ASSERT_THROWS_CODE(std::move(pf.future).get(), DBException, ErrorCodes::BrokenPromise);
}
TEST(Promise, MoveAssignedPromiseIsTheSameAsTheOldOne) {
const int kResult = 11;
auto pf = makePromiseFuture<int>();
auto promise = std::move(pf.promise);
promise.emplaceValue(kResult);
ASSERT_EQ(std::move(pf.future).get(), kResult);
}
} // namespace
} // namespace mongo
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