/*
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Aug 7, 2008
*/
package com.bigdata.striterator;
import java.util.Arrays;
import com.bigdata.striterator.PushbackIterator;
import junit.framework.TestCase2;
/**
* Unit test for {@link PushbackIterator}.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class TestPushbackIterator extends TestCase2 {
/**
*
*/
public TestPushbackIterator() {
}
/**
* @param arg0
*/
public TestPushbackIterator(String arg0) {
super(arg0);
}
public void test_filter() {
final PushbackIterator<Long> actual = new PushbackIterator<Long>(Arrays
.asList(new Long[] { 1L, 5L, 2L }).iterator());
assertTrue(actual.hasNext());
assertEquals(Long.valueOf(1L),actual.next());
actual.pushback();
assertTrue(actual.hasNext());
assertEquals(Long.valueOf(1L),actual.next());
assertTrue(actual.hasNext());
assertEquals(Long.valueOf(5L), actual.next());
actual.pushback();
try {
actual.pushback();
fail("Expecting: " + IllegalStateException.class);
} catch (IllegalStateException ex) {
log.info("Ignoring expected exception: " + ex);
}
assertTrue(actual.hasNext());
assertEquals(Long.valueOf(5L),actual.next());
assertTrue(actual.hasNext());
assertEquals(Long.valueOf(2L),actual.next());
assertFalse(actual.hasNext());
actual.pushback();
assertTrue(actual.hasNext());
assertEquals(Long.valueOf(2L),actual.next());
assertFalse(actual.hasNext());
}
}