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/**
* Copyright (C) 2022-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/client/async_remote_command_targeter_adapter.h"
#include "mongo/client/connection_string.h"
#include "mongo/client/remote_command_targeter.h"
#include "mongo/client/remote_command_targeter_factory_mock.h"
#include "mongo/client/remote_command_targeter_mock.h"
#include "mongo/client/remote_command_targeter_rs.h"
#include "mongo/unittest/unittest.h"
#include <cstddef>
#include <memory>
#include <vector>
namespace mongo {
namespace async_rpc {
namespace {
class AsyncRemoteCommandTargeterAdapterTest : public unittest::Test {
public:
const std::vector<HostAndPort> kHosts{HostAndPort("FakeHost1", 12345),
HostAndPort("FakeHost2", 12345)};
void setUp() {
auto factory = RemoteCommandTargeterFactoryMock();
_targeter = factory.create(ConnectionString::forStandalones(kHosts));
auto targeterMock = getTargeterMock();
targeterMock->setFindHostsReturnValue(kHosts);
}
std::shared_ptr<RemoteCommandTargeter> getTargeter() {
return _targeter;
}
std::shared_ptr<RemoteCommandTargeterMock> getTargeterMock() {
return RemoteCommandTargeterMock::get(_targeter);
}
private:
std::shared_ptr<RemoteCommandTargeter> _targeter;
};
/**
* AsyncRemoteCommandTargeterAdapter resolves to the correct underlying HostAndPort.
*/
TEST_F(AsyncRemoteCommandTargeterAdapterTest, TargeterResolvesCorrectly) {
ReadPreferenceSetting readPref;
auto targeter = AsyncRemoteCommandTargeterAdapter(readPref, getTargeter());
auto resolveFuture = targeter.resolve(CancellationToken::uncancelable());
ASSERT_EQUALS(resolveFuture.get()[0], kHosts[0]);
}
/**
* When onRemoteCommandError is called, the targeter updates its view of the underlying topology
* correctly.
*/
TEST_F(AsyncRemoteCommandTargeterAdapterTest, OnRemoteErrorUpdatesTopology) {
ReadPreferenceSetting readPref;
AsyncRemoteCommandTargeterAdapter targeter =
AsyncRemoteCommandTargeterAdapter(readPref, getTargeter());
[[maybe_unused]] auto commandErrorResponse = targeter.onRemoteCommandError(
kHosts[0], Status(ErrorCodes::NotPrimaryNoSecondaryOk, "mock"));
auto markedDownHosts = getTargeterMock()->getAndClearMarkedDownHosts();
auto markedDownHost = *markedDownHosts.begin();
ASSERT_EQUALS(markedDownHosts.size(), 1);
ASSERT_EQUALS(markedDownHost, kHosts[0]);
}
/**
* When onRemoteCommandError is called, the targeter updates its view of the underlying topology
* correctly and the resolver receives those changes.
*/
TEST_F(AsyncRemoteCommandTargeterAdapterTest, OnRemoteErrorUpdatesTopologyAndResolver) {
ReadPreferenceSetting readPref;
AsyncRemoteCommandTargeterAdapter targeter =
AsyncRemoteCommandTargeterAdapter(readPref, getTargeter());
// Mark down a host and ensure that it has been noted as marked down.
[[maybe_unused]] auto commandErrorResponse = targeter.onRemoteCommandError(
kHosts[0], Status(ErrorCodes::NotPrimaryNoSecondaryOk, "mock"));
auto markedDownHosts = getTargeterMock()->getAndClearMarkedDownHosts();
auto markedDownHost = *markedDownHosts.begin();
// Remove that host from the vector of targets and set that new vector as the return value of
// findHosts.
std::vector<HostAndPort> newTargets(1);
remove_copy(kHosts.begin(), kHosts.end(), newTargets.begin(), markedDownHost);
getTargeterMock()->setFindHostsReturnValue(newTargets);
// Check that the resolve function has been updated accordingly.
auto resolveFuture = targeter.resolve(CancellationToken::uncancelable());
ASSERT_EQUALS(resolveFuture.get()[0], kHosts[1]);
}
} // namespace
} // namespace async_rpc
} // namespace mongo
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