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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.
*/
#pragma once
#include <sstream>
#include <string>
#include <vector>
#include "mongo/base/status.h"
#include "mongo/logger/appender.h"
#include "mongo/logger/log_severity.h"
#include "mongo/logger/logger.h"
#include "mongo/logger/message_log_domain.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
namespace logger {
// Used for testing logging framework only.
// TODO(schwerin): Have logger write to a different log from the global log, so that tests can
// redirect their global log output for examination.
template <typename MessageEventEncoder>
class LogTest : public unittest::Test {
friend class LogTestAppender;
public:
LogTest() : _severityOld(globalLogDomain()->getMinimumLogSeverity()) {
globalLogDomain()->clearAppenders();
_appenderHandle =
globalLogDomain()->attachAppender(std::make_unique<LogTestAppender>(this));
}
virtual ~LogTest() {
globalLogDomain()->detachAppender(_appenderHandle);
globalLogDomain()->setMinimumLoggedSeverity(_severityOld);
}
protected:
std::vector<std::string> _logLines;
LogSeverity _severityOld;
private:
class LogTestAppender : public MessageLogDomain::EventAppender {
public:
explicit LogTestAppender(LogTest* ltest) : _ltest(ltest) {}
virtual ~LogTestAppender() {}
virtual Status append(const MessageLogDomain::Event& event) {
std::ostringstream _os;
if (!_encoder.encode(event, _os))
return Status(ErrorCodes::LogWriteFailed, "Failed to append to LogTestAppender.");
_ltest->_logLines.push_back(_os.str());
return Status::OK();
}
private:
LogTest* _ltest;
MessageEventEncoder _encoder;
};
MessageLogDomain::AppenderHandle _appenderHandle;
};
} // namespace logger
} // namespace mongo
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