/*
* 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.ArrayList ;
import java.util.List ;
import org.apache.jena.atlas.iterator.Iter ;
import org.apache.jena.atlas.iterator.PushbackIterator ;
import org.apache.jena.atlas.junit.BaseTest ;
import org.junit.Test ;
public class TestIteratorPushback extends BaseTest
{
static List<String> data = new ArrayList<>() ;
static {
data.add("a") ;
data.add("b") ;
data.add("c") ;
}
@Test(expected=IllegalArgumentException.class)
public void pushback01() { new PushbackIterator<String>(null) ; }
@Test public void pushback02()
{
PushbackIterator<String> iter = new PushbackIterator<>(data.iterator()) ;
assertEquals("a", iter.next()) ;
assertEquals("b", iter.next()) ;
assertEquals("c", iter.next()) ;
assertFalse(iter.hasNext()) ;
}
@Test public void pushback03()
{
PushbackIterator<String> iter = new PushbackIterator<>(data.iterator()) ;
iter.pushback("x") ;
assertEquals("x", iter.next()) ;
assertEquals("a", iter.next()) ;
assertEquals(2, Iter.count(iter)) ;
}
@Test public void pushback04()
{
PushbackIterator<String> iter = new PushbackIterator<>(data.iterator()) ;
assertEquals("a", iter.next()) ;
iter.pushback("x") ;
assertEquals("x", iter.next()) ;
assertEquals("b", iter.next()) ;
assertEquals(1, Iter.count(iter)) ;
}
@Test public void pushback05()
{
PushbackIterator<String> iter = new PushbackIterator<>(data.iterator()) ;
assertEquals("a", iter.next()) ;
iter.pushback("x") ;
iter.pushback("y") ;
assertEquals("y", iter.next()) ;
assertEquals("x", iter.next()) ;
assertEquals("b", iter.next()) ;
assertEquals(1, Iter.count(iter)) ;
}
@Test public void pushback06()
{
PushbackIterator<String> iter = new PushbackIterator<>(data.iterator()) ;
assertEquals(3, Iter.count(iter)) ;
iter.pushback("x") ;
iter.pushback("y") ;
assertEquals("y", iter.next()) ;
assertEquals("x", iter.next()) ;
assertFalse(iter.hasNext()) ;
}
}