/**
* 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.mahout.cf.taste.impl.similarity;
import org.apache.mahout.cf.taste.common.TasteException;
import org.apache.mahout.cf.taste.impl.TasteTestCase;
import org.apache.mahout.cf.taste.model.DataModel;
import org.apache.mahout.cf.taste.similarity.PreferenceInferrer;
import org.junit.Test;
/** <p>Tests {@link AveragingPreferenceInferrer}.</p> */
public final class AveragingPreferenceInferrerTest extends TasteTestCase {
@Test
public void testInferrer() throws TasteException {
DataModel model = getDataModel(new long[] {1}, new Double[][] {{3.0,-2.0,5.0}});
PreferenceInferrer inferrer = new AveragingPreferenceInferrer(model);
double inferred = inferrer.inferPreference(1, 3);
assertEquals(2.0, inferred, EPSILON);
}
}