/*
* org.openmicroscopy.shoola.util.concur.tasks.TestFutureInt
*
*------------------------------------------------------------------------------
* Copyright (C) 2006 University of Dundee. All rights reserved.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*------------------------------------------------------------------------------
*/
package org.openmicroscopy.shoola.util.concur.tasks;
//Java imports
//Third-party libraries
import junit.framework.TestCase;
//Application-internal dependencies
import org.openmicroscopy.shoola.util.concur.ThreadSupport;
/**
* Verifies that {@link Future} correctly aborts in the case of interruption.
* Each test spawns an ad-hoc thread which is interrupted to verify how
* {@link Future} reacts to interruption. The result of the test is passed
* back into the main flow (JUnit) so to perform the needed assertions.
* Note that we never interrupt JUnit. Spawning another thread might seem
* unecessary when we could just interrupt JUnit and then clear the interrupted
* status after the test. However implementation characteristics of
* interruption-based methods are quite uncertain, so we prefer using a
* separate thread (which is simply discarded at the end of the test) rather
* than interrupting JUnit and making thus room for possible side effects.
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @author <br>Andrea Falconi
* <a href="mailto:a.falconi@dundee.ac.uk">
* a.falconi@dundee.ac.uk</a>
* @version 2.2
* <small>
* (<b>Internal version:</b> $Revision$ $Date$)
* </small>
* @since OME2.2
*/
public class TestFutureInt
extends TestCase
{
private Future target; //Object to test.
private InterruptedException intExc; //To transfer exc to the main thread.
public void setUp()
{
target = new Future(); //Not in a legal state yet (two-step init).
target.setCommand(
new ExecCommand(new NullMultiStepTask(),
new NullResultAssembler(), target,
new NullExecMonitor())); //OK, init completed now.
}
public void testThreadInterruption()
{
//Create a task to call target.getResult().
Runnable doGetResult = new Runnable() {
public void run() {
try {
target.getResult();
} catch (InterruptedException ie) {
intExc = ie;
} catch (ExecException ee) {}
}
};
//Run the task in a new interrupted thread and wait for it to finish.
ThreadSupport.runInNewInterruptedThread(doGetResult);
//Now check that an InterruptedException was thrown.
assertNotNull("A getResult shouldn't proceed if the thread is "+
"interrupted.", intExc);
}
}