/*
* 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.event;
import org.grouplens.lenskit.data.pref.Preference;
import org.junit.Test;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
public class RatingBuilderTest {
@Test
public void testInitialState() {
RatingBuilder rb = new RatingBuilder();
assertThat(rb.hasRating(), equalTo(false));
try {
rb.build();
fail("building a rating should fail");
} catch (IllegalStateException e) {
/* expected */
}
}
@Test
public void testSetUserId() {
RatingBuilder rb = new RatingBuilder();
rb.setUserId(42);
assertThat(rb.getUserId(), equalTo(42L));
}
@Test
public void testSetItemId() {
RatingBuilder rb = new RatingBuilder();
rb.setItemId(42);
assertThat(rb.getItemId(), equalTo(42L));
}
@Test
public void testSetRating() {
RatingBuilder rb = new RatingBuilder();
rb.setRating(3.5);
assertThat(rb.hasRating(), equalTo(true));
assertThat(rb.getRating(), equalTo(3.5));
}
@Test
public void testClearRating() {
RatingBuilder rb = new RatingBuilder();
rb.setRating(3.5);
rb.clearRating();
assertThat(rb.hasRating(), equalTo(false));
}
@Test
public void testSetTimestamp() {
RatingBuilder rb = new RatingBuilder();
rb.setTimestamp(235909);
assertThat(rb.getTimestamp(), equalTo(235909L));
}
@Test
public void testBuildRating() {
Rating r = new RatingBuilder()
.setUserId(692)
.setItemId(483)
.setRating(3.5)
.setTimestamp(349702)
.build();
assertThat(r, notNullValue());
assertThat(r.getUserId(), equalTo(692L));
assertThat(r.getItemId(), equalTo(483L));
Preference pref = r.getPreference();
assertThat(pref, notNullValue());
assert pref != null;
assertThat(pref.getValue(), equalTo(3.5));
assertThat(pref.getUserId(), equalTo(692L));
assertThat(pref.getItemId(), equalTo(483L));
assertThat(r.getTimestamp(), equalTo(349702L));
}
@Test
public void testBuildUnrate() {
Rating r = new RatingBuilder()
.setUserId(692)
.setItemId(483)
.setTimestamp(349702)
.build();
assertThat(r, notNullValue());
assertThat(r.getUserId(), equalTo(692L));
assertThat(r.getItemId(), equalTo(483L));
Preference pref = r.getPreference();
assertThat(pref, nullValue());
assertThat(r.getTimestamp(), equalTo(349702L));
}
}