/*
* 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 com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import org.grouplens.lenskit.data.event.MutableRating;
import org.grouplens.lenskit.data.event.Rating;
import org.grouplens.lenskit.data.event.Ratings;
import org.junit.BeforeClass;
import org.junit.experimental.theories.DataPoints;
import org.junit.experimental.theories.Theories;
import org.junit.experimental.theories.Theory;
import org.junit.runner.RunWith;
import java.nio.ByteBuffer;
import java.util.EnumSet;
import java.util.List;
import java.util.Set;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;
/**
* Test rendering with all possible combinations of flags.
*
* @author <a href="http://www.grouplens.org">GroupLens Research</a>
*/
@RunWith(Theories.class)
public class BinaryFormatRenderTest {
@DataPoints
public static BinaryFormat[] formats;
@BeforeClass
public static void makeFormats() {
List<BinaryFormat> fmts = Lists.newArrayList();
for (Set<PackHeaderFlag> flags: Sets.powerSet(EnumSet.allOf(PackHeaderFlag.class))) {
fmts.add(BinaryFormat.create(flags.toArray(new PackHeaderFlag[flags.size()])));
}
formats = fmts.toArray(new BinaryFormat[fmts.size()]);
}
@Theory
public void testRenderRating(BinaryFormat format) {
long ts = format.hasTimestamps() ? 34208L : -1;
Rating r = Ratings.make(42L, 39L, Math.PI, ts);
ByteBuffer buf = ByteBuffer.allocate(format.getRatingSize());
format.renderRating(r, buf);
buf.flip();
buf.mark();
MutableRating r2 = new MutableRating();
format.readRating(buf, r2);
assertThat(r2, equalTo(r));
buf.reset();
Rating r3 = format.readRating(buf);
assertThat(r3, equalTo(r));
}
}