/*
* 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 java.util.Arrays ;
import java.util.List ;
import org.apache.jena.atlas.iterator.IteratorWithBuffer ;
import org.apache.jena.atlas.junit.BaseTest ;
import org.junit.Test ;
public class TestIteratorWithBuffer extends BaseTest
{
@Test public void iterBuffer_01()
{
IteratorWithBuffer<String> iter = createBuffered(1, "a", "b", "c") ;
assertEquals(1, iter.currentSize()) ;
assertEquals("a", iter.peek(0)) ;
assertEquals(1, iter.currentSize()) ;
assertEquals("a", iter.next()) ;
assertEquals(1, iter.currentSize()) ;
assertEquals("b", iter.peek(0)) ;
assertEquals(1, iter.currentSize()) ;
assertEquals("b", iter.next()) ;
assertEquals(1, iter.currentSize()) ;
assertEquals("c", iter.peek(0)) ;
assertEquals(1, iter.currentSize()) ;
assertEquals("c", iter.next()) ;
assertEquals(0, iter.currentSize()) ;
assertEquals(null, iter.peek(0)) ;
assertEquals(0, iter.currentSize()) ;
}
@Test public void iterBuffer_02()
{
IteratorWithBuffer<String> iter = createBuffered(2, "a", "b", "c") ;
assertEquals(2, iter.currentSize()) ;
assertEquals("a", iter.peek(0)) ;
assertEquals("b", iter.peek(1)) ;
assertEquals("a", iter.next()) ;
assertEquals("b", iter.peek(0)) ;
assertEquals("c", iter.peek(1)) ;
assertEquals("b", iter.next()) ;
assertEquals("c", iter.peek(0)) ;
assertEquals(null, iter.peek(1)) ;
assertEquals("c", iter.next()) ;
assertEquals(null, iter.peek(0)) ;
}
@Test public void iterBuffer_03()
{
IteratorWithBuffer<String> iter = createBuffered(1) ;
assertEquals(null, iter.peek(0)) ;
}
@Test(expected=IndexOutOfBoundsException.class)
public void iterBuffer_04()
{
IteratorWithBuffer<String> iter = createBuffered(0, "a") ;
assertEquals(null, iter.peek(0)) ;
}
@Test public void iterBuffer_05()
{
IteratorWithBuffer<String> iter = createBuffered(2, "a") ;
assertEquals("a", iter.peek(0)) ;
assertEquals(null, iter.peek(1)) ;
assertEquals("a", iter.next()) ;
}
private IteratorWithBuffer<String> createBuffered(int N, String... strings)
{
List<String> data = Arrays.asList(strings) ;
IteratorWithBuffer<String> iter = new IteratorWithBuffer<>(data.iterator(), N) ;
return iter ;
}
}