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/**
* Copyright (C) 2019-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/unittest/unittest.h"
#include "mongo/util/future_test_utils.h"
namespace mongo {
namespace {
TEST(Executor_Future, Success_getAsync) {
FUTURE_SUCCESS_TEST([] {},
[](auto&& fut) {
auto exec = InlineQueuedCountingExecutor::make();
auto pf = makePromiseFuture<void>();
ExecutorFuture<void>(exec).thenRunOn(exec).getAsync(
[outside = std::move(pf.promise)](Status status) mutable {
ASSERT_OK(status);
outside.emplaceValue();
});
ASSERT_EQ(std::move(pf.future).getNoThrow(), Status::OK());
ASSERT_EQ(exec->tasksRun.load(), 1);
});
}
TEST(Executor_Future, Reject_getAsync) {
FUTURE_SUCCESS_TEST([] {},
[](auto&& fut) {
auto exec = RejectingExecutor::make();
auto pf = makePromiseFuture<void>();
std::move(fut).thenRunOn(exec).getAsync(
[promise = std::move(pf.promise)](Status status) mutable {
promise.emplaceValue(); // shouldn't be run anyway.
FAIL("how did I run!?!?!");
});
// Promise is destroyed without calling the callback.
ASSERT_EQ(std::move(pf.future).getNoThrow(), ErrorCodes::BrokenPromise);
});
}
TEST(Executor_Future, Success_then) {
FUTURE_SUCCESS_TEST([] {},
[](auto&& fut) {
auto exec = InlineQueuedCountingExecutor::make();
ASSERT_EQ(std::move(fut).thenRunOn(exec).then([]() { return 3; }).get(),
3);
ASSERT_EQ(exec->tasksRun.load(), 1);
});
}
TEST(Executor_Future, Reject_then) {
FUTURE_SUCCESS_TEST([] {},
[](auto&& fut) {
auto exec = RejectingExecutor::make();
ASSERT_EQ(std::move(fut)
.thenRunOn(exec)
.then([]() {
FAIL("where am I running?");
return 42;
})
.getNoThrow(),
ErrorCodes::ShutdownInProgress);
});
}
TEST(Executor_Future, Fail_then) {
FUTURE_FAIL_TEST<void>([](auto&& fut) {
auto exec = InlineQueuedCountingExecutor::make();
ASSERT_EQ(std::move(fut)
.thenRunOn(exec)
.then([]() {
FAIL("then() callback was called");
return int();
})
.getNoThrow(),
failStatus());
ASSERT_EQ(exec->tasksRun.load(), 0);
});
}
TEST(Executor_Future, Success_onError) {
FUTURE_SUCCESS_TEST([] { return 3; },
[](auto&& fut) {
auto exec = InlineQueuedCountingExecutor::make();
ASSERT_EQ(std::move(fut)
.thenRunOn(exec)
.onError([](Status&&) {
FAIL("onError() callback was called");
return 42;
})
.get(),
3);
ASSERT_EQ(exec->tasksRun.load(), 0);
});
}
TEST(Executor_Future, Fail_onErrorSimple) {
FUTURE_FAIL_TEST<int>([](auto&& fut) {
auto exec = InlineQueuedCountingExecutor::make();
ASSERT_EQ(std::move(fut)
.thenRunOn(exec)
.onError([](Status s) FTU_LAMBDA_R(int) {
ASSERT_EQ(s, failStatus());
return 3;
})
.get(),
3);
ASSERT_EQ(exec->tasksRun.load(), 1);
});
}
TEST(Executor_Future, Fail_onErrorCode_OtherCode) {
FUTURE_FAIL_TEST<void>([](auto&& fut) {
auto exec = InlineQueuedCountingExecutor::make();
ASSERT_EQ(std::move(fut)
.thenRunOn(exec)
.template onError<ErrorCodes::BadValue>(
[](Status s) FTU_LAMBDA_R(void) { FAIL("wrong code, sir"); })
.getNoThrow(),
failStatus());
ASSERT_EQ(exec->tasksRun.load(), 0);
});
}
TEST(Executor_Future, Success_then_onError_onError_then) {
FUTURE_SUCCESS_TEST(
[] {},
[](auto&& fut) {
auto exec = InlineQueuedCountingExecutor::make();
ASSERT_EQ(std::move(fut)
.thenRunOn(exec)
.then([] { return failStatus(); })
.onError([](Status s) FTU_LAMBDA_R(void) { ASSERT_EQ(s, failStatus()); })
.onError([](Status)
FTU_LAMBDA_R(void) { FAIL("how did you get this number?"); })
.then([] { return 3; })
.get(),
3);
// 1 would also be valid if we did the optimization to not reschedule if
// running on the same executor.
ASSERT_EQ(exec->tasksRun.load(), 3);
});
}
TEST(Executor_Future, Success_reject_recoverToFallback) {
FUTURE_SUCCESS_TEST(
[] {},
[](auto&& fut) {
auto rejecter = RejectingExecutor::make();
auto accepter = InlineQueuedCountingExecutor::make();
auto res = std::move(fut)
.thenRunOn(rejecter)
.then([] { FAIL("then()"); })
.onError([](Status) FTU_LAMBDA_R(void) { FAIL("onError()"); })
.onCompletion([](Status) FTU_LAMBDA_R(void) { FAIL("onCompletion()"); })
.thenRunOn(accepter)
.then([] {
FAIL("error?");
return 42;
})
.onError([](Status s) FTU_LAMBDA_R(int) {
ASSERT_EQ(s, ErrorCodes::ShutdownInProgress);
return 3;
})
.get();
ASSERT_EQ(res, 3);
ASSERT_EQ(accepter->tasksRun.load(), 1);
});
}
} // namespace
} // namespace mongo
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