/*
* 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.transform.quantize;
import static org.junit.Assert.*;
import static org.hamcrest.Matchers.*;
import org.grouplens.lenskit.transform.quantize.Quantizer;
import org.grouplens.lenskit.transform.quantize.ValueArrayQuantizer;
import org.junit.Test;
/**
* @author <a href="http://www.grouplens.org">GroupLens Research</a>
*/
public class ValueArrayQuantizerTest {
@Test
public void testFindSingle() {
Quantizer q = new ValueArrayQuantizer(new double[]{5.0});
assertThat(q.getCount(), equalTo(1));
assertThat(q.getIndexValue(0), equalTo(5.0));
assertThat(q.index(2.5), equalTo(0));
assertThat(q.index(5.0), equalTo(0));
}
@Test
public void testSomeElements() {
Quantizer q = new ValueArrayQuantizer(new double[]{1.0, 2.0, 3.0, 4.0, 5.0});
assertThat(q.getCount(), equalTo(5));
assertThat(q.getIndexValue(0), equalTo(1.0));
assertThat(q.index(2.5), equalTo(2));
assertThat(q.index(5.0), equalTo(4));
assertThat(q.index(1.73), equalTo(1));
}
}