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* and other copyright owners as documented in the project's IP log.
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* This program and the accompanying materials are made available
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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.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 TimeoutInputStreamTest {
private static final int timeout = 250;
private PipedOutputStream out;
private PipedInputStream in;
private InterruptTimer timer;
private TimeoutInputStream is;
private long start;
@Before
public void setUp() throws Exception {
out = new PipedOutputStream();
in = new PipedInputStream(out);
timer = new InterruptTimer();
is = new TimeoutInputStream(in, timer);
is.setTimeout(timeout);
}
@After
public void tearDown() throws Exception {
timer.terminate();
for (Thread t : active())
assertFalse(t instanceof InterruptTimer.AlarmThread);
}
@Test
public void testTimeout_readByte_Success1() throws IOException {
out.write('a');
assertEquals('a', is.read());
}
@Test
public void testTimeout_readByte_Success2() throws IOException {
final byte[] exp = new byte[] { 'a', 'b', 'c' };
out.write(exp);
assertEquals(exp[0], is.read());
assertEquals(exp[1], is.read());
assertEquals(exp[2], is.read());
out.close();
assertEquals(-1, is.read());
}
@Test
public void testTimeout_readByte_Timeout() throws IOException {
beginRead();
try {
is.read();
fail("incorrectly read a byte");
} catch (InterruptedIOException e) {
// expected
}
assertTimeout();
}
@Test
public void testTimeout_readBuffer_Success1() throws IOException {
final byte[] exp = new byte[] { 'a', 'b', 'c' };
final byte[] act = new byte[exp.length];
out.write(exp);
IO.readFully(is, act, 0, act.length);
assertArrayEquals(exp, act);
}
@Test
public void testTimeout_readBuffer_Success2() throws IOException {
final byte[] exp = new byte[] { 'a', 'b', 'c' };
final byte[] act = new byte[exp.length];
out.write(exp);
IO.readFully(is, act, 0, 1);
IO.readFully(is, act, 1, 1);
IO.readFully(is, act, 2, 1);
assertArrayEquals(exp, act);
}
@Test
public void testTimeout_readBuffer_Timeout() throws IOException {
beginRead();
try {
IO.readFully(is, new byte[512], 0, 512);
fail("incorrectly read bytes");
} catch (InterruptedIOException e) {
// expected
}
assertTimeout();
}
@Test
public void testTimeout_skip_Success() throws IOException {
final byte[] exp = new byte[] { 'a', 'b', 'c' };
out.write(exp);
assertEquals(2, is.skip(2));
assertEquals('c', is.read());
}
@Test
public void testTimeout_skip_Timeout() throws IOException {
beginRead();
try {
is.skip(1024);
fail("incorrectly skipped bytes");
} catch (InterruptedIOException e) {
// expected
}
assertTimeout();
}
private void beginRead() {
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();
}
}