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/*
* SonarScanner CLI
* Copyright (C) 2011-2024 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
package testutils;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.classic.spi.LoggingEvent;
import java.util.List;
import org.junit.jupiter.api.extension.AfterEachCallback;
import org.junit.jupiter.api.extension.BeforeEachCallback;
import org.junit.jupiter.api.extension.ExtensionContext;
import org.slf4j.LoggerFactory;
import org.slf4j.event.Level;
public class LogTester implements BeforeEachCallback, AfterEachCallback {
private final ConcurrentListAppender<ILoggingEvent> listAppender = new ConcurrentListAppender<>();
public LogTester() {
setLevel(Level.INFO);
}
/**
* Change log level.
* By default, INFO logs are enabled when LogTester is started.
*/
public LogTester setLevel(Level level) {
getRootLogger().setLevel(ch.qos.logback.classic.Level.fromLocationAwareLoggerInteger(level.toInt()));
return this;
}
private static ch.qos.logback.classic.Logger getRootLogger() {
return (ch.qos.logback.classic.Logger) LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME);
}
/**
* Logs in chronological order (item at index 0 is the oldest one)
*/
public List<String> logs() {
return listAppender.list.stream().map(e -> (LoggingEvent) e)
.map(LoggingEvent::getFormattedMessage)
.toList();
}
/**
* Logs in chronological order (item at index 0 is the oldest one) for
* a given level
*/
public List<String> logs(Level level) {
return listAppender.list.stream().map(e -> (LoggingEvent) e)
.filter(e -> e.getLevel().equals(ch.qos.logback.classic.Level.fromLocationAwareLoggerInteger(level.toInt())))
.map(LoggingEvent::getFormattedMessage)
.toList();
}
public LogTester clear() {
listAppender.list.clear();
return this;
}
@Override
public void beforeEach(ExtensionContext context) throws Exception {
getRootLogger().addAppender(listAppender);
listAppender.start();
}
@Override
public void afterEach(ExtensionContext context) throws Exception {
listAppender.stop();
listAppender.list.clear();
getRootLogger().detachAppender(listAppender);
// Reset the level for following-up test suites
setLevel(Level.INFO);
}
}
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