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/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8171385
* @summary Test JShell#stop
* @modules jdk.jshell/jdk.internal.jshell.tool
* @build KullaTesting TestingInputStream
* @run testng StopExecutionTest
*/
import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Random;
import java.util.concurrent.CountDownLatch;
import java.util.function.Consumer;
import jdk.internal.jshell.tool.StopDetectingInputStream;
import jdk.internal.jshell.tool.StopDetectingInputStream.State;
import jdk.jshell.JShell;
import org.testng.annotations.Test;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.fail;
@Test
public class StopExecutionTest extends KullaTesting {
private final Object lock = new Object();
private boolean isStopped;
@Test(enabled = false) // TODO 8129546
public void testStopLoop() throws InterruptedException {
scheduleStop("while (true) ;");
}
@Test(enabled = false) // TODO 8129546
public void testStopASleep() throws InterruptedException {
scheduleStop("while (true) { try { Thread.sleep(100); } catch (InterruptedException ex) { } }");
}
@Test(enabled = false) // TODO 8129546
public void testScriptCatchesStop() throws Exception {
scheduleStop("for (int i = 0; i < 30; i++) { try { Thread.sleep(100); } catch (Throwable ex) { } }");
}
private void scheduleStop(String src) throws InterruptedException {
JShell state = getState();
isStopped = false;
StringWriter writer = new StringWriter();
PrintWriter out = new PrintWriter(writer);
Thread t = new Thread(() -> {
int i = 1;
int n = 30;
synchronized (lock) {
do {
state.stop();
if (!isStopped) {
out.println("Not stopped. Try again: " + i);
try {
lock.wait(1000);
} catch (InterruptedException ignored) {
}
}
} while (i++ < n && !isStopped);
if (!isStopped) {
System.err.println(writer.toString());
fail("Evaluation was not stopped: '" + src + "'");
}
}
});
t.start();
assertEval(src);
synchronized (lock) {
out.println("Evaluation was stopped successfully: '" + src + "'");
isStopped = true;
lock.notify();
}
// wait until the background thread finishes to prevent from calling 'stop' on closed state.
t.join();
}
public void testStopDetectingInputRandom() throws IOException {
long seed = System.nanoTime();
Random r = new Random(seed);
for (int m = 0; m < 10; m++) {
StopDetectingInputStream buffer = new StopDetectingInputStream(null, null);
buffer.setState(State.BUFFER);
for (int i = 0; i < 1000; i++) {
int chunkSize = r.nextInt(StopDetectingInputStream.INITIAL_SIZE * 3);
doChunk(buffer, chunkSize);
}
}
}
private void doChunk(StopDetectingInputStream buffer, int chunkSize) throws IOException {
for (int c = 0; c < chunkSize; c++) {
buffer.write(c);
}
for (int c = 0; c < chunkSize; c++) {
int read = buffer.read();
assertEquals(read, c);
}
}
public void testStopDetectingInputBufferWaitStop() throws Exception {
Runnable shouldNotHappenRun =
() -> { throw new AssertionError("Should not happen."); };
Consumer<Exception> shouldNotHappenExc =
exc -> { throw new AssertionError("Should not happen.", exc); };
StopDetectingInputStream sd = new StopDetectingInputStream(shouldNotHappenRun, shouldNotHappenExc);
CountDownLatch reading = new CountDownLatch(1);
PipedInputStream is = new PipedInputStream() {
@Override
public int read() throws IOException {
reading.countDown();
return super.read();
}
};
PipedOutputStream os = new PipedOutputStream(is);
sd.setInputStream(is);
sd.setState(State.BUFFER);
reading.await();
sd.setState(State.WAIT);
os.write(3);
int value = sd.read();
if (value != 3) {
throw new AssertionError();
}
}
}
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