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/*******************************************************************************
* Copyright (c) 2005, 2007 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.utility.tests.internal.iterators;
import java.util.ListIterator;
import java.util.NoSuchElementException;
import junit.framework.TestCase;
import org.eclipse.jpt.utility.internal.iterators.EmptyListIterator;
public class EmptyListIteratorTests extends TestCase {
public EmptyListIteratorTests(String name) {
super(name);
}
public void testHasNext() {
int i = 0;
for (ListIterator<Object> stream = EmptyListIterator.instance(); stream.hasNext();) {
stream.next();
i++;
}
assertEquals(0, i);
}
public void testNext() {
for (ListIterator<Object> stream = EmptyListIterator.instance(); stream.hasNext();) {
fail("bogus element: " + stream.next());
}
}
public void testNextIndex() {
ListIterator<Object> stream = EmptyListIterator.instance();
assertEquals(0, stream.nextIndex());
}
public void testHasPrevious() {
ListIterator<Object> stream = EmptyListIterator.instance();
int i = 0;
while (stream.hasPrevious()) {
stream.previous();
i++;
}
assertEquals(0, i);
while (stream.hasNext()) {
stream.next();
}
i = 0;
while (stream.hasPrevious()) {
stream.previous();
i++;
}
assertEquals(0, i);
}
public void testPrevious() {
ListIterator<Object> stream = EmptyListIterator.instance();
while (stream.hasPrevious()) {
fail("bogus element: " + stream.previous());
}
while (stream.hasNext()) {
stream.next();
}
while (stream.hasPrevious()) {
fail("bogus element: " + stream.previous());
}
}
public void testPreviousIndex() {
ListIterator<Object> stream = EmptyListIterator.instance();
assertEquals(-1, stream.previousIndex());
}
public void testNoSuchElementException() {
boolean exCaught = false;
ListIterator<Object> stream = EmptyListIterator.instance();
Object element = null;
while (stream.hasNext()) {
element = stream.next();
}
try {
element = stream.next();
} catch (NoSuchElementException ex) {
exCaught = true;
}
assertTrue("NoSuchElementException not thrown (next): " + element, exCaught);
while (stream.hasPrevious()) {
element = stream.previous();
}
try {
element = stream.previous();
} catch (NoSuchElementException ex) {
exCaught = true;
}
assertTrue("NoSuchElementException not thrown (previous): " + element, exCaught);
}
public void testUnsupportedOperationException() {
boolean exCaught = false;
try {
EmptyListIterator.instance().remove();
} catch (UnsupportedOperationException ex) {
exCaught = true;
}
assertTrue("UnsupportedOperationException not thrown (remove)", exCaught);
try {
EmptyListIterator.instance().set(new Object());
} catch (UnsupportedOperationException ex) {
exCaught = true;
}
assertTrue("UnsupportedOperationException not thrown (set)", exCaught);
try {
EmptyListIterator.instance().add(new Object());
} catch (UnsupportedOperationException ex) {
exCaught = true;
}
assertTrue("UnsupportedOperationException not thrown (add)", exCaught);
}
}
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