/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jena.atlas.iterator;
import static org.junit.Assert.assertEquals ;
import java.util.Arrays ;
import java.util.Iterator ;
import java.util.List ;
import org.junit.Test ;
public class TestIteratorTruncate {
@Test public void iter_truncate_00() {
Iterator<String> iter = new IteratorTruncate<>(Iter.nullIterator(), (item)->true) ;
long n = Iter.count(iter) ;
assertEquals(0, n) ;
}
@Test public void iter_truncate_01() {
List<String> data = Arrays.asList("a", "b", "c") ;
Iterator<String> iter = new IteratorTruncate<>(data.iterator(), (item)->true) ;
long n = Iter.count(iter) ;
assertEquals(3, n) ;
}
@Test public void iter_truncate_02() {
List<String> data = Arrays.asList("a", "b", "c") ;
Iterator<String> iter = new IteratorTruncate<>(data.iterator(), (item)-> item.equals("a")) ;
long n = Iter.count(iter) ;
assertEquals(1, n) ;
}
@Test public void iter_truncate_03() {
List<String> data = Arrays.asList("a", "b", "c") ;
Iterator<String> iter = new IteratorTruncate<>(data.iterator(), (item)-> !item.equals("c")) ;
long n = Iter.count(iter) ;
assertEquals(2, n) ;
}
@Test public void iter_truncate_04() {
List<String> data = Arrays.asList("a", "b", "c") ;
Iterator<String> iter = new IteratorTruncate<>(data.iterator(), (item)-> item.equals("koala")) ;
long n = Iter.count(iter) ;
assertEquals(0, n) ;
}
@Test public void iter_truncate_05() {
List<String> data = Arrays.asList("a", "b", "b", "c" , "c", "d") ;
Iterator<String> iter = new IteratorTruncate<>(data.iterator(), (item)-> !item.equals("c")) ;
long n = Iter.count(iter) ;
assertEquals(3, n) ;
}
}