/*
* org.openmicroscopy.shoola.util.concur.TestObjectTransferStateDep
*
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* 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.
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*/
package org.openmicroscopy.shoola.util.concur;
//Java imports
//Third-party libraries
import junit.framework.TestCase;
//Application-internal dependencies
/**
* Verifies the the state-dependence constructs in {@link ObjectTransfer}.
*
* @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 TestObjectTransferStateDep
extends TestCase
{
private ObjectTransfer target; //Object under test.
public void setUp()
{
target = new ObjectTransfer();
}
public void testCollectWhenEmpty_1()
{
final Throwable[] exc = new Throwable[1];
Runnable doCollect = new Runnable() {
public void run() {
try {
target.collect();
} catch (Throwable t) {
exc[0] = t;
}
}
};
ThreadSupport ts = new ThreadSupport(doCollect);
ts.startAltFlow();
ts.pauseMainFlow();
//The above makes it likely that alt flow is suspended on a wait().
//This is when we want to interrupt.
ts.interruptAltFlow();
ts.awaitAltFlow();
assertNotNull("collect() shouldn't have proceeded on an Empty state.",
exc[0]);
assertTrue("collect() shouldn't have proceeded on an Empty state.",
exc[0] instanceof InterruptedException);
}
public void testCollectWhenEmpty_2()
throws InterruptedException
{
assertNull("collect(100) should return null after 100ms if the state"+
" is Empty.", target.collect(100));
assertNull("collect(0) should return null straightaway if the state"+
" is Empty.", target.collect(0));
}
public void testHandOffWhenFull()
throws InterruptedException
{
Runnable doCollect = new Runnable() {
public void run() {
try {
target.collect();
} catch (InterruptedException ie) {
//Should never happen; don't bother b/c this would show up
//as a deadlock.
}
}
};
final ThreadSupport ts = new ThreadSupport(doCollect);
final boolean[] handedOff = new boolean[] { true };
target.register(new ControlFlowObserver() {
public void update(int checkPointID) {
if (checkPointID == ObjectTransfer.TRANSITION_TO_FULL) {
ts.startAltFlow(); //Calls collect().
} else { //We're in the collect() done by the alt flow.
try {
handedOff[0] = target.handOff(new Object(), 100);
} catch (InterruptedException ie) {
//Should never happen; don't bother b/c handedOff[0]
//will be true and the test fail anyway.
}
}
}
});
target.handOff(new Object());
ts.awaitAltFlow();
assertFalse("Timed hand-off was supposed to return false after timeout"+
" because the state was Full.", handedOff[0]);
}
}