/*
* LensKit, an open source recommender systems toolkit.
* Copyright 2010-2014 LensKit Contributors. See CONTRIBUTORS.md.
* Work on LensKit has been funded by the National Science Foundation under
* grants IIS 05-34939, 08-08692, 08-12148, and 10-17697.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.grouplens.lenskit.data.dao.packed;
import it.unimi.dsi.fastutil.ints.IntList;
import org.junit.Test;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import static org.hamcrest.Matchers.hasSize;
import static org.hamcrest.collection.IsIterableContainingInOrder.contains;
import static org.junit.Assert.assertThat;
/**
* @author <a href="http://www.grouplens.org">GroupLens Research</a>
*/
public class BufferBackedIntListTest {
@Test
public void testEmptyBuffer() {
IntList list = BufferBackedIntList.create(IntBuffer.allocate(0));
assertThat(list, hasSize(0));
}
@Test
public void testSingletonBuffer() {
ByteBuffer buf = ByteBuffer.allocate(4);
buf.putInt(42);
buf.flip();
IntList list = BufferBackedIntList.create(buf.asIntBuffer());
assertThat(list, hasSize(1));
assertThat(list, contains(42));
}
@Test
public void testFiveElementBuffer() {
ByteBuffer buf = ByteBuffer.allocate(32);
for (int i = 0; i < 5; i++) {
buf.putInt(i);
}
buf.flip();
IntList list = BufferBackedIntList.create(buf.asIntBuffer());
assertThat(list, hasSize(5));
assertThat(list, contains(0, 1, 2, 3, 4));
}
}