/**
* 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.isis.core.commons.lang;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.junit.Assert.assertThat;
import java.util.List;
import com.google.common.collect.Lists;
import org.junit.Test;
public class ListUtilsTest_insert {
@Test
public void insert_whenInsertionPointAtBeginning() throws Exception {
final List<Integer> list = Lists.newArrayList(Integer.valueOf(0), Integer.MAX_VALUE, Integer.MIN_VALUE);
ListExtensions.insert(list, 0, Integer.valueOf(10));
assertThat(list.size(), is(4));
assertThat(list.get(0), is(Integer.valueOf(10)));
assertThat(list.get(1), is(Integer.valueOf(0)));
assertThat(list.get(2), is(Integer.MAX_VALUE));
assertThat(list.get(3), is(Integer.MIN_VALUE));
}
@Test
public void insert_whenInsertionPointInMiddle() throws Exception {
final List<Integer> list = Lists.newArrayList(Integer.valueOf(0), Integer.MAX_VALUE, Integer.MIN_VALUE);
ListExtensions.insert(list, 1, Integer.valueOf(10));
assertThat(list.size(), is(4));
assertThat(list.get(0), is(Integer.valueOf(0)));
assertThat(list.get(1), is(Integer.valueOf(10)));
assertThat(list.get(2), is(Integer.MAX_VALUE));
assertThat(list.get(3), is(Integer.MIN_VALUE));
}
@Test
public void insert_whenInsertionPointAtEnd() throws Exception {
final List<Integer> list = Lists.newArrayList(Integer.valueOf(0), Integer.MAX_VALUE, Integer.MIN_VALUE);
ListExtensions.insert(list, 3, Integer.valueOf(10));
assertThat(list.size(), is(4));
assertThat(list.get(0), is(Integer.valueOf(0)));
assertThat(list.get(1), is(Integer.MAX_VALUE));
assertThat(list.get(2), is(Integer.MIN_VALUE));
assertThat(list.get(3), is(Integer.valueOf(10)));
}
@Test
public void insert_whenInsertionPointBeyondEnd() throws Exception {
final List<Integer> list = Lists.newArrayList(Integer.valueOf(0), Integer.MAX_VALUE, Integer.MIN_VALUE);
ListExtensions.insert(list, 4, Integer.valueOf(10));
assertThat(list.size(), is(5));
assertThat(list.get(0), is(Integer.valueOf(0)));
assertThat(list.get(1), is(Integer.MAX_VALUE));
assertThat(list.get(2), is(Integer.MIN_VALUE));
assertThat(list.get(3), is(nullValue()));
assertThat(list.get(4), is(Integer.valueOf(10)));
}
}