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/*******************************************************************************
* Copyright (c) 2020 Paul Pazderski and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Paul Pazderski - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.tests.console;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.nio.charset.Charset;
import java.util.Set;
import org.eclipse.core.runtime.Platform;
import org.eclipse.debug.internal.core.DebugCoreMessages;
import org.eclipse.debug.internal.core.InputStreamMonitor;
import org.eclipse.debug.tests.AbstractDebugTest;
import org.eclipse.debug.tests.TestUtil;
import org.eclipse.debug.tests.TestsPlugin;
import org.junit.Test;
/**
* Tests the {@link InputStreamMonitor}.
*/
public class InputStreamMonitorTests extends AbstractDebugTest {
/**
* Simple test for input stream monitor. Write some bytes before starting
* the monitor, some after and check if they are correctly transfered.
*/
@Test
@SuppressWarnings("resource")
public void testInputStreamMonitor() throws Exception {
PipedInputStream sysin = new PipedInputStream();
InputStreamMonitor monitor = new InputStreamMonitor(new PipedOutputStream(sysin));
byte[] content = new byte[100];
for (int i = 0; i < content.length; i++) {
content[i] = (byte) (i % 255);
}
try {
int half = content.length / 2;
monitor.write(content, 0, half);
monitor.startMonitoring();
monitor.write(content, half, content.length - half);
Thread.sleep(30);
byte[] readBack = new byte[content.length];
int read = sysin.read(readBack);
assertEquals("Monitor wrote to few bytes.", read, content.length);
assertEquals("Monitor wrote to much bytes.", 0, sysin.available());
assertArrayEquals("Monitor wrote wrong content.", content, readBack);
} finally {
monitor.close();
}
}
/**
* Test that passing <code>null</code> as charset does not raise exceptions.
*/
@Test
@SuppressWarnings("resource")
public void testNullCharset() throws Exception {
PipedInputStream sysin = new PipedInputStream();
InputStreamMonitor monitor = new InputStreamMonitor(new PipedOutputStream(sysin), (Charset) null);
String text = "o\u00F6O\u00EFiI\u00D6\u00D8\u00F8";
try {
monitor.startMonitoring();
monitor.write(text);
Thread.sleep(30);
byte[] readBack = new byte[1000];
int len = sysin.read(readBack);
assertEquals("Monitor wrote wrong content.", text, new String(readBack, 0, len));
} finally {
monitor.close();
}
}
/**
* Test different combinations of stream closing.
*/
@Test
@SuppressWarnings("resource")
public void testClose() throws Exception {
Set<Thread> allThreads = Thread.getAllStackTraces().keySet();
long alreadyLeakedThreads = allThreads.stream().filter(t -> DebugCoreMessages.InputStreamMonitor_label.equals(t.getName())).count();
if (alreadyLeakedThreads > 0) {
Platform.getLog(TestsPlugin.class).warn("Test started with " + alreadyLeakedThreads + " leaked monitor threads.");
}
{
ClosableTestOutputStream testStream = new ClosableTestOutputStream();
InputStreamMonitor monitor = new InputStreamMonitor(testStream);
assertEquals("Stream closed to early.", 0, testStream.numClosed);
monitor.closeInputStream();
TestUtil.waitWhile(() -> testStream.numClosed == 0, 100);
assertEquals("Stream not closed.", 1, testStream.numClosed);
}
{
ClosableTestOutputStream testStream = new ClosableTestOutputStream();
InputStreamMonitor monitor = new InputStreamMonitor(testStream);
monitor.startMonitoring();
assertEquals("Stream closed to early.", 0, testStream.numClosed);
monitor.close();
TestUtil.waitWhile(() -> testStream.numClosed == 0, 200);
assertEquals("Stream not closed.", 1, testStream.numClosed);
}
{
ClosableTestOutputStream testStream = new ClosableTestOutputStream();
InputStreamMonitor monitor = new InputStreamMonitor(testStream);
monitor.startMonitoring();
assertEquals("Stream closed to early.", 0, testStream.numClosed);
monitor.closeInputStream();
monitor.close();
monitor.close();
TestUtil.waitWhile(() -> testStream.numClosed == 0, 100);
assertEquals("Stream not closed or to often.", 1, testStream.numClosed);
}
allThreads = Thread.getAllStackTraces().keySet();
long numMonitorThreads = allThreads.stream().filter(t -> DebugCoreMessages.InputStreamMonitor_label.equals(t.getName())).count();
assertEquals("Leaked monitor threads.", 0, numMonitorThreads);
}
/**
* Extension of output stream to log calls to {@link #close()}.
*/
public static class ClosableTestOutputStream extends OutputStream {
public volatile int numClosed = 0;
@Override
public void close() throws IOException {
numClosed++;
}
@Override
public void write(int b) throws IOException {
}
}
}
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