/*
* org.openmicroscopy.shoola.util.concur.tasks.TestFuture
*
*------------------------------------------------------------------------------
* 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
/**
* Tests the operation of {@link Future} in a single-threaded
* environment.
* Makes sure that state-transitions are correct.
*
* @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 TestFuture
extends TestCase
{
//Object under test.
private Future future;
public void setUp()
{
future = new Future(); //Not in a legal state yet (two-step init).
future.setCommand(new MockExecCommand()); //OK, init completed now.
}
public void testFuture()
{
assertEquals(
"After initialization, state should be WAITING_FOR_RESULT.",
Future.WAITING_FOR_RESULT, future.getState());
}
public void testSetResult()
throws ExecException, InterruptedException
{
Object result = new Object();
future.setResult(result);
assertEquals("After setResult(), state should be HAS_RESULT.",
Future.HAS_RESULT, future.getState());
try {
assertEquals("getResult() returned the wrong object.",
result, future.getResult());
future.setResult(result);
fail("A Future shouldn't be reused for another result.");
} catch (Error e) {
//OK, expected.
}
try {
future.setException(new Exception());
fail("setException() should error if called after setResult().");
} catch (Error e) {
//OK, expected.
}
}
public void testSetNullResult()
throws ExecException, InterruptedException
{
future.setResult(null);
assertEquals("After setResult(), state should be HAS_RESULT.",
Future.HAS_RESULT, future.getState());
assertEquals("getResult() should have returned null.",
null, future.getResult());
}
public void testSetException()
throws InterruptedException
{
Exception srvFailure = new Exception();
future.setException(srvFailure);
assertEquals("After setException(), state should be HAS_EXCEPTION.",
Future.HAS_EXCEPTION, future.getState());
try {
future.getResult();
fail("getResult() should have thrown an ExecException.");
} catch (ExecException ee) {
//OK expected, but check the original exception:
assertEquals("ExecException should wrap the original exception.",
srvFailure, ee.getCause());
}
try {
future.setException(srvFailure);
fail("A Future shouldn't be reused for another exception.");
} catch (Error e) {
//OK, expected.
}
try {
future.setResult(null);
fail("setResult() should error if called after setException().");
} catch (Error e) {
//OK, expected.
}
}
public void testSetNullException()
throws InterruptedException
{
future.setException(null);
assertEquals("After setException(), state should be HAS_EXCEPTION.",
Future.HAS_EXCEPTION, future.getState());
try {
future.getResult();
fail("getResult() should have thrown an ExecException.");
} catch (ExecException ee) {
//OK expected, but check the original exception:
assertTrue(
"setException(null) should result in an Error being set.",
ee.getCause() instanceof Error);
}
}
public void testUnimplementedGetResult()
throws ExecException, InterruptedException
{
try {
future.getResult(0);
fail("Method has been implemented, remove this test.");
} catch (NoSuchMethodError nsme) {
//OK, expected.
}
}
}