/*******************************************************************************
* Copyright (c) 2005, 2009 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.ArrayList;
import java.util.List;
import java.util.ListIterator;
import java.util.NoSuchElementException;
import junit.framework.TestCase;
import org.eclipse.jpt.utility.internal.iterators.ReadOnlyListIterator;
@SuppressWarnings("nls")
public class ReadOnlyListIteratorTests extends TestCase {
public ReadOnlyListIteratorTests(String name) {
super(name);
}
public void testHasNextAndHasPrevious() {
int i = 0;
ListIterator<String> stream = this.buildReadOnlyListIterator();
while (stream.hasNext()) {
stream.next();
i++;
}
assertEquals(this.buildList().size(), i);
while (stream.hasPrevious()) {
stream.previous();
i--;
}
assertEquals(0, i);
}
public void testHasNextAndHasPreviousUpcast() {
int i = 0;
ListIterator<Object> stream = this.buildReadOnlyListIteratorUpcast();
while (stream.hasNext()) {
stream.next();
i++;
}
assertEquals(this.buildList().size(), i);
while (stream.hasPrevious()) {
stream.previous();
i--;
}
assertEquals(0, i);
}
public void testNextAndPrevious() {
ListIterator<String> nestedListIterator = this.buildNestedListIterator();
ListIterator<String> stream = this.buildReadOnlyListIterator();
while (stream.hasNext()) {
assertEquals("bogus element", nestedListIterator.next(), stream.next());
}
while (stream.hasPrevious()) {
assertEquals("bogus element", nestedListIterator.previous(), stream.previous());
}
}
public void testNextAndPreviousUpcast() {
ListIterator<String> nestedListIterator = this.buildNestedListIterator();
ListIterator<Object> stream = this.buildReadOnlyListIteratorUpcast();
while (stream.hasNext()) {
assertEquals("bogus element", nestedListIterator.next(), stream.next());
}
while (stream.hasPrevious()) {
assertEquals("bogus element", nestedListIterator.previous(), stream.previous());
}
}
public void testNextIndexAndPreviousIndex() {
ListIterator<String> nestedListIterator = this.buildNestedListIterator();
ListIterator<String> stream = this.buildReadOnlyListIterator();
while (stream.hasNext()) {
assertEquals("bogus index", nestedListIterator.nextIndex(), stream.nextIndex());
nestedListIterator.next();
stream.next();
}
assertEquals("bogus index", this.buildList().size(), stream.nextIndex());
while (stream.hasPrevious()) {
assertEquals("bogus element", nestedListIterator.previousIndex(), stream.previousIndex());
nestedListIterator.previous();
stream.previous();
}
assertEquals("bogus index", -1, stream.previousIndex());
}
public void testNextIndexAndPreviousIndexUpcast() {
ListIterator<String> nestedListIterator = this.buildNestedListIterator();
ListIterator<Object> stream = this.buildReadOnlyListIteratorUpcast();
while (stream.hasNext()) {
assertEquals("bogus index", nestedListIterator.nextIndex(), stream.nextIndex());
nestedListIterator.next();
stream.next();
}
assertEquals("bogus index", this.buildList().size(), stream.nextIndex());
while (stream.hasPrevious()) {
assertEquals("bogus element", nestedListIterator.previousIndex(), stream.previousIndex());
nestedListIterator.previous();
stream.previous();
}
assertEquals("bogus index", -1, stream.previousIndex());
}
public void testNoSuchElementException() {
boolean exCaught = false;
ListIterator<String> stream = this.buildReadOnlyListIterator();
String string = null;
while (stream.hasNext()) {
string = stream.next();
}
try {
string = stream.next();
} catch (NoSuchElementException ex) {
exCaught = true;
}
assertTrue("NoSuchElementException not thrown: " + string, exCaught);
}
public void testRemove() {
boolean exCaught = false;
for (ListIterator<String> stream = this.buildReadOnlyListIterator(); stream.hasNext();) {
if (stream.next().equals("three")) {
try {
stream.remove();
} catch (UnsupportedOperationException ex) {
exCaught = true;
}
}
}
assertTrue("UnsupportedOperationException not thrown", exCaught);
}
public void testSet() {
boolean exCaught = false;
for (ListIterator<String> stream = this.buildReadOnlyListIterator(); stream.hasNext();) {
if (stream.next().equals("three")) {
try {
stream.set("bogus");
} catch (UnsupportedOperationException ex) {
exCaught = true;
}
}
}
assertTrue("UnsupportedOperationException not thrown", exCaught);
}
public void testAdd() {
boolean exCaught = false;
for (ListIterator<String> stream = this.buildReadOnlyListIterator(); stream.hasNext();) {
if (stream.next().equals("three")) {
try {
stream.add("bogus");
} catch (UnsupportedOperationException ex) {
exCaught = true;
}
}
}
assertTrue("UnsupportedOperationException not thrown", exCaught);
}
private ListIterator<String> buildReadOnlyListIterator() {
return this.buildReadOnlyListIterator(this.buildNestedListIterator());
}
private ListIterator<Object> buildReadOnlyListIteratorUpcast() {
return this.buildReadOnlyListIteratorUpcast(this.buildNestedListIterator());
}
private ListIterator<String> buildReadOnlyListIterator(ListIterator<String> nestedListIterator) {
return new ReadOnlyListIterator<String>(nestedListIterator);
}
private ListIterator<Object> buildReadOnlyListIteratorUpcast(ListIterator<String> nestedListIterator) {
return new ReadOnlyListIterator<Object>(nestedListIterator);
}
private ListIterator<String> buildNestedListIterator() {
return this.buildList().listIterator();
}
private List<String> buildList() {
List<String> l = new ArrayList<String>();
l.add("one");
l.add("two");
l.add("three");
l.add("four");
l.add("five");
l.add("six");
l.add("seven");
l.add("eight");
return l;
}
}
