/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.test.utility.iterators;
import java.util.Enumeration;
import java.util.NoSuchElementException;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.eclipse.persistence.tools.workbench.utility.iterators.NullEnumeration;
public class NullEnumerationTests extends TestCase {
public static Test suite() {
return new TestSuite(NullEnumerationTests.class);
}
public NullEnumerationTests(String name) {
super(name);
}
public void testHasMoreElements() {
int i = 0;
for (Enumeration stream = NullEnumeration.instance(); stream.hasMoreElements(); ) {
stream.nextElement();
i++;
}
assertEquals(0, i);
}
public void testNextElement() {
for (Enumeration stream = NullEnumeration.instance(); stream.hasMoreElements(); ) {
fail("bogus element: " + stream.nextElement());
}
}
public void testNoSuchElementException() {
boolean exCaught = false;
Enumeration stream = NullEnumeration.instance();
Object element = null;
while (stream.hasMoreElements()) {
element = stream.nextElement();
}
try {
element = stream.nextElement();
} catch (NoSuchElementException ex) {
exCaught = true;
}
assertTrue("NoSuchElementException not thrown: " + element, exCaught);
}
}