/**
* Copyright 2013 Twitter, Inc.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
package com.twitter.hbc.processor;
import com.twitter.hbc.core.processor.HosebirdMessageProcessor;
import com.twitter.hbc.core.processor.LineStringProcessor;
import com.twitter.hbc.core.processor.StringDelimitedProcessor;
import com.twitter.hbc.test.SimpleStreamProvider;
import org.junit.Before;
import org.junit.Test;
import java.io.IOException;
import java.io.InputStream;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import static org.junit.Assert.*;
public class StreamProcessorTest {
private String[] messages;
@Before
public void setup() {
// just an arbitrary set of messages
messages = new String[100];
for (int i = 0; i < messages.length; i++) {
messages[i] = "messages" + i;
}
}
/**
* StringDelimitedProcessor properly processes streams
*/
@Test
public void testDelimitedStreamProcessing() throws Exception {
SimpleStreamProvider simpleStream = new SimpleStreamProvider(messages, true, false);
BlockingQueue<String> queue = new ArrayBlockingQueue<String>(10);
HosebirdMessageProcessor processor = new StringDelimitedProcessor(queue);
int count = processStream(simpleStream, processor, queue);
assertEquals(messages.length, count);
}
@Test
public void testSimpleStreamProcessing() throws Exception {
SimpleStreamProvider simpleStream = new SimpleStreamProvider(messages, false, false);
BlockingQueue<String> queue = new ArrayBlockingQueue<String>(10);
HosebirdMessageProcessor processor = new LineStringProcessor(queue);
int count = processStream(simpleStream, processor, queue);
assertEquals(messages.length, count);
}
private int processStream(SimpleStreamProvider simpleStream, HosebirdMessageProcessor processor, BlockingQueue<String> queue) throws InterruptedException {
int count = 0;
try {
InputStream stream = simpleStream.createInputStream();
processor.setup(stream);
// read until we hit the IOException
while (count < messages.length * 2) {
processor.process();
// trimming to get rid of the CRLF
assertTrue(messages[count].equals(queue.take().trim()));
count++;
}
fail();
} catch (IOException e) {
// expected
}
return count;
}
@Test
public void testIdleProbe() throws Exception {
SimpleStreamProvider simpleStream = new SimpleStreamProvider(messages, true, true);
int count = 0;
try {
InputStream stream = simpleStream.createInputStream();
BlockingQueue<String> queue = new ArrayBlockingQueue<String>(10);
HosebirdMessageProcessor processor = new StringDelimitedProcessor(queue);
processor.setup(stream);
// read until we hit the IOException
while (count < messages.length * 2) {
processor.process();
// trimming to get rid of the CRLF
assertTrue(messages[count].equals(queue.take().trim()));
count++;
}
fail();
} catch (IOException e) {
// expected
}
assertEquals(messages.length, count);
}
}