/**
* 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.recommender.svd;
import org.apache.mahout.cf.taste.impl.TasteTestCase;
import org.apache.mahout.cf.taste.impl.common.FastByIDMap;
import org.junit.Test;
import java.io.File;
public class FilePersistenceStrategyTest extends TasteTestCase {
@Test
public void persistAndLoad() throws Exception {
FastByIDMap<Integer> userIDMapping = new FastByIDMap<Integer>();
FastByIDMap<Integer> itemIDMapping = new FastByIDMap<Integer>();
userIDMapping.put(123, 0);
userIDMapping.put(456, 1);
itemIDMapping.put(12, 0);
itemIDMapping.put(34, 1);
double[][] userFeatures = { { 0.1, 0.2, 0.3 }, { 0.4, 0.5, 0.6 } };
double[][] itemFeatures = { { 0.7, 0.8, 0.9 }, { 1.0, 1.1, 1.2 } };
Factorization original = new Factorization(userIDMapping, itemIDMapping, userFeatures, itemFeatures);
File storage = getTestTempFile("storage.bin");
PersistenceStrategy persistenceStrategy = new FilePersistenceStrategy(storage);
assertNull(persistenceStrategy.load());
persistenceStrategy.maybePersist(original);
Factorization clone = persistenceStrategy.load();
assertEquals(original, clone);
}
}