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/*******************************************************************************
* Copyright (c) 2005, 2012 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0, which accompanies this distribution
* and is available at https://www.eclipse.org/legal/epl-2.0/.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.tests.internal.iterator;
import java.util.Iterator;
import java.util.NoSuchElementException;
import junit.framework.TestCase;
import org.eclipse.jpt.common.utility.internal.iterator.EmptyIterator;
@SuppressWarnings("nls")
public class EmptyIteratorTests extends TestCase {
public EmptyIteratorTests(String name) {
super(name);
}
public void testHasNext() {
int i = 0;
for (Iterator<Object> stream = EmptyIterator.instance(); stream.hasNext();) {
stream.next();
i++;
}
assertEquals(0, i);
}
public void testNext() {
for (Iterator<String> stream = EmptyIterator.instance(); stream.hasNext();) {
fail("bogus element: " + stream.next());
}
}
public void testNoSuchElementException() {
boolean exCaught = false;
Iterator<Number> stream = EmptyIterator.instance();
Object element = null;
while (stream.hasNext()) {
element = stream.next();
}
try {
element = stream.next();
} catch (NoSuchElementException ex) {
exCaught = true;
}
assertTrue("NoSuchElementException not thrown: " + element, exCaught);
}
public void testUnsupportedOperationException() {
boolean exCaught = false;
try {
EmptyIterator.instance().remove();
} catch (UnsupportedOperationException ex) {
exCaught = true;
}
assertTrue("UnsupportedOperationException not thrown", exCaught);
}
}
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