/*
* The MIT License
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.util;
import static java.util.Arrays.asList;
import static org.junit.Assert.*;
import hudson.util.Iterators.CountingPredicate;
import java.util.Iterator;
import java.util.List;
import org.junit.Test;
/**
* @author Kohsuke Kawaguchi
*/
public class IteratorsTest {
@Test
public void reverseSequence() {
List<Integer> lst = Iterators.reverseSequence(1, 4);
assertEquals(3,(int)lst.get(0));
assertEquals(2,(int)lst.get(1));
assertEquals(1,(int)lst.get(2));
assertEquals(3,lst.size());
}
@Test
public void sequence() {
List<Integer> lst = Iterators.sequence(1,4);
assertEquals(1,(int)lst.get(0));
assertEquals(2,(int)lst.get(1));
assertEquals(3,(int)lst.get(2));
assertEquals(3, lst.size());
}
@Test
public void wrap() {
List<Integer> lst = Iterators.sequence(1,4);
Iterable<Integer> wrapped = Iterators.wrap(lst);
assertFalse(wrapped instanceof List);
Iterator<Integer> iter = wrapped.iterator();
assertTrue(iter.hasNext());
assertEquals(1,(int)iter.next());
assertTrue(iter.hasNext());
assertEquals(2,(int)iter.next());
assertTrue(iter.hasNext());
assertEquals(3,(int)iter.next());
assertFalse(iter.hasNext());
}
@Test
public void limit() {
assertEquals("[0]",com.google.common.collect.Iterators.toString(Iterators.limit(asList(0,1,2,3,4).iterator(), EVEN)));
assertEquals("[]", com.google.common.collect.Iterators.toString(Iterators.limit(asList(1,2,4,6).iterator(), EVEN)));
}
public static final CountingPredicate<Integer> EVEN = new CountingPredicate<Integer>() {
public boolean apply(int index, Integer input) {
return input % 2 == 0;
}
};
}