/**
* The MIT License
* Copyright (c) 2014-2016 Ilkka Seppälä
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.iluwatar.poison.pill;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.AppenderBase;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.LoggerFactory;
import java.time.LocalDateTime;
import java.util.LinkedList;
import java.util.List;
import static org.junit.Assert.assertTrue;
/**
* Date: 12/27/15 - 9:45 PM
*
* @author Jeroen Meulemeester
*/
public class ConsumerTest {
private InMemoryAppender appender;
@Before
public void setUp() {
appender = new InMemoryAppender(Consumer.class);
}
@After
public void tearDown() {
appender.stop();
}
@Test
public void testConsume() throws Exception {
final Message[] messages = new Message[]{
createMessage("you", "Hello!"),
createMessage("me", "Hi!"),
Message.POISON_PILL,
createMessage("late_for_the_party", "Hello? Anyone here?"),
};
final MessageQueue queue = new SimpleMessageQueue(messages.length);
for (final Message message : messages) {
queue.put(message);
}
new Consumer("NSA", queue).consume();
assertTrue(appender.logContains("Message [Hello!] from [you] received by [NSA]"));
assertTrue(appender.logContains("Message [Hi!] from [me] received by [NSA]"));
assertTrue(appender.logContains("Consumer NSA receive request to terminate."));
}
/**
* Create a new message from the given sender with the given message body
*
* @param sender The sender's name
* @param message The message body
* @return The message instance
*/
private static Message createMessage(final String sender, final String message) {
final SimpleMessage msg = new SimpleMessage();
msg.addHeader(Message.Headers.SENDER, sender);
msg.addHeader(Message.Headers.DATE, LocalDateTime.now().toString());
msg.setBody(message);
return msg;
}
private class InMemoryAppender extends AppenderBase<ILoggingEvent> {
private List<ILoggingEvent> log = new LinkedList<>();
public InMemoryAppender(Class clazz) {
((Logger) LoggerFactory.getLogger(clazz)).addAppender(this);
start();
}
@Override
protected void append(ILoggingEvent eventObject) {
log.add(eventObject);
}
public boolean logContains(String message) {
return log.stream().anyMatch(event -> event.getFormattedMessage().equals(message));
}
}
}