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/*******************************************************************************
* 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.Enumeration;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Vector;
import junit.framework.TestCase;
import org.eclipse.jpt.utility.internal.iterators.EnumerationIterator;
@SuppressWarnings("nls")
public class EnumerationIteratorTests extends TestCase {
public EnumerationIteratorTests(String name) {
super(name);
}
public void testHasNext() {
int i = 0;
for (Iterator<String> stream = this.buildIterator(); stream.hasNext();) {
stream.next();
i++;
}
assertEquals(this.buildVector().size(), i);
}
public void testHasNextUpcast() {
int i = 0;
for (Iterator<Object> stream = this.buildIteratorUpcast(); stream.hasNext();) {
stream.next();
i++;
}
assertEquals(this.buildVector().size(), i);
}
public void testNext() {
Enumeration<String> enumeration = this.buildEnumeration();
for (Iterator<String> stream = this.buildIterator(); stream.hasNext();) {
assertEquals("bogus element", enumeration.nextElement(), stream.next());
}
}
public void testNextUpcast() {
Enumeration<String> enumeration = this.buildEnumeration();
for (Iterator<Object> stream = this.buildIteratorUpcast(); stream.hasNext();) {
assertEquals("bogus element", enumeration.nextElement(), stream.next());
}
}
public void testNoSuchElementException() {
boolean exCaught = false;
Iterator<String> stream = this.buildIterator();
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 testUnsupportedOperationException() {
boolean exCaught = false;
for (Iterator<String> stream = this.buildIterator(); stream.hasNext();) {
if (stream.next().equals("three")) {
try {
stream.remove();
} catch (UnsupportedOperationException ex) {
exCaught = true;
}
}
}
assertTrue("UnsupportedOperationException not thrown", exCaught);
}
private Iterator<String> buildIterator() {
return this.buildIterator(this.buildEnumeration());
}
private Iterator<String> buildIterator(Enumeration<String> enumeration) {
return new EnumerationIterator<String>(enumeration);
}
private Enumeration<String> buildEnumeration() {
return this.buildVector().elements();
}
private Vector<String> buildVector() {
Vector<String> v = new Vector<String>();
v.addElement("one");
v.addElement("two");
v.addElement("three");
v.addElement("four");
v.addElement("five");
v.addElement("six");
v.addElement("seven");
v.addElement("eight");
return v;
}
private Iterator<Object> buildIteratorUpcast() {
return this.buildIteratorUpcast(this.buildEnumeration());
}
private Iterator<Object> buildIteratorUpcast(Enumeration<String> enumeration) {
return new EnumerationIterator<Object>(enumeration);
}
}
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