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/*
* Copyright (C) 2009-2010, Google Inc. and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.util.io;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.io.OutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.util.Arrays;
import java.util.List;
import org.eclipse.jgit.util.IO;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class TimeoutOutputStreamTest {
private static final int timeout = 250;
private PipedOutputStream out;
private FullPipeInputStream in;
private InterruptTimer timer;
private TimeoutOutputStream os;
private long start;
@Before
public void setUp() throws Exception {
out = new PipedOutputStream();
in = new FullPipeInputStream(out);
timer = new InterruptTimer();
os = new TimeoutOutputStream(out, timer);
os.setTimeout(timeout);
}
@After
public void tearDown() throws Exception {
timer.terminate();
for (Thread t : active())
assertFalse(t instanceof InterruptTimer.AlarmThread);
}
@Test
public void testTimeout_writeByte_Success1() throws IOException {
in.free(1);
os.write('a');
in.want(1);
assertEquals('a', in.read());
}
@Test
public void testTimeout_writeByte_Success2() throws IOException {
final byte[] exp = new byte[] { 'a', 'b', 'c' };
final byte[] act = new byte[exp.length];
in.free(exp.length);
os.write(exp[0]);
os.write(exp[1]);
os.write(exp[2]);
in.want(exp.length);
in.read(act);
assertArrayEquals(exp, act);
}
@Test
public void testTimeout_writeByte_Timeout() throws IOException {
beginWrite();
try {
os.write('\n');
fail("incorrectly write a byte");
} catch (InterruptedIOException e) {
// expected
}
assertTimeout();
}
@Test
public void testTimeout_writeBuffer_Success1() throws IOException {
final byte[] exp = new byte[] { 'a', 'b', 'c' };
final byte[] act = new byte[exp.length];
in.free(exp.length);
os.write(exp);
in.want(exp.length);
in.read(act);
assertArrayEquals(exp, act);
}
@Test
public void testTimeout_writeBuffer_Timeout() throws IOException {
beginWrite();
try {
os.write(new byte[512]);
fail("incorrectly wrote bytes");
} catch (InterruptedIOException e) {
// expected
}
assertTimeout();
}
@Test
public void testTimeout_flush_Success() throws IOException {
final boolean[] called = new boolean[1];
os = new TimeoutOutputStream(new OutputStream() {
@Override
public void write(int b) throws IOException {
fail("should not have written");
}
@Override
public void flush() throws IOException {
called[0] = true;
}
}, timer);
os.setTimeout(timeout);
os.flush();
assertTrue(called[0]);
}
@Test
public void testTimeout_flush_Timeout() throws IOException {
final boolean[] called = new boolean[1];
os = new TimeoutOutputStream(new OutputStream() {
@Override
public void write(int b) throws IOException {
fail("should not have written");
}
@Override
public void flush() throws IOException {
called[0] = true;
for (;;) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
InterruptedIOException e1 = new InterruptedIOException();
e1.initCause(e);
throw e1;
}
}
}
}, timer);
os.setTimeout(timeout);
beginWrite();
try {
os.flush();
fail("incorrectly flushed");
} catch (InterruptedIOException e) {
// expected
}
assertTimeout();
assertTrue(called[0]);
}
@Test
public void testTimeout_close_Success() throws IOException {
final boolean[] called = new boolean[1];
os = new TimeoutOutputStream(new OutputStream() {
@Override
public void write(int b) throws IOException {
fail("should not have written");
}
@Override
public void close() throws IOException {
called[0] = true;
}
}, timer);
os.setTimeout(timeout);
os.close();
assertTrue(called[0]);
}
@Test
public void testTimeout_close_Timeout() throws IOException {
final boolean[] called = new boolean[1];
os = new TimeoutOutputStream(new OutputStream() {
@Override
public void write(int b) throws IOException {
fail("should not have written");
}
@Override
public void close() throws IOException {
called[0] = true;
for (;;) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
InterruptedIOException e1 = new InterruptedIOException();
e1.initCause(e);
throw e1;
}
}
}
}, timer);
os.setTimeout(timeout);
beginWrite();
try {
os.close();
fail("incorrectly closed");
} catch (InterruptedIOException e) {
// expected
}
assertTimeout();
assertTrue(called[0]);
}
private void beginWrite() {
start = now();
}
private void assertTimeout() {
// Our timeout was supposed to be ~250 ms. Since this is a timing
// test we can't assume we spent *exactly* the timeout period, as
// there may be other activity going on in the system. Instead we
// look for the delta between the start and end times to be within
// 50 ms of the expected timeout.
//
final long wait = now() - start;
assertTrue("waited only " + wait + " ms", timeout - wait < 50);
}
private static List<Thread> active() {
Thread[] all = new Thread[16];
int n = Thread.currentThread().getThreadGroup().enumerate(all);
while (n == all.length) {
all = new Thread[all.length * 2];
n = Thread.currentThread().getThreadGroup().enumerate(all);
}
return Arrays.asList(all).subList(0, n);
}
private static long now() {
return System.currentTimeMillis();
}
private static final class FullPipeInputStream extends PipedInputStream {
FullPipeInputStream(PipedOutputStream src) throws IOException {
super(src);
src.write(new byte[PIPE_SIZE]);
}
void want(int cnt) throws IOException {
IO.skipFully(this, PIPE_SIZE - cnt);
}
void free(int cnt) throws IOException {
IO.skipFully(this, cnt);
}
}
}
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