net.myrrix.online.MultiRescorerProviderTest.java Source code

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Here is the source code for net.myrrix.online.MultiRescorerProviderTest.java

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/*
 * Copyright Myrrix Ltd
 *
 * Licensed 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 net.myrrix.online;

import org.apache.mahout.cf.taste.recommender.IDRescorer;
import org.apache.mahout.cf.taste.recommender.Rescorer;
import org.apache.mahout.common.LongPair;
import org.junit.Test;

import net.myrrix.common.MyrrixRecommender;
import net.myrrix.common.MyrrixTest;
import net.myrrix.online.example.rescorer.FilterHalfRescorerProvider;

public final class MultiRescorerProviderTest extends MyrrixTest {

    @Test
    public void testMultiRecommendRescorer() {
        RescorerProvider multi = new MultiRescorerProvider(new SimpleModRescorerProvider(2),
                new SimpleModRescorerProvider(3));

        IDRescorer provider = multi.getRecommendRescorer(new long[] { 5 }, (MyrrixRecommender) null);
        assertNull(provider);

        provider = multi.getRecommendRescorer(new long[] { 2 }, (MyrrixRecommender) null);
        assertNotNull(provider);
        assertFalse(provider instanceof MultiRescorer);
        assertTrue(provider.isFiltered(3));
        assertFalse(provider.isFiltered(2));

        provider = multi.getRecommendRescorer(new long[] { 6 }, (MyrrixRecommender) null);
        assertNotNull(provider);
        assertTrue(provider instanceof MultiRescorer);
        assertTrue(provider.isFiltered(3));
        assertTrue(provider.isFiltered(2));
        assertFalse(provider.isFiltered(12));
    }

    @Test
    public void testMultiRecommendToAnonymousRescorer() {
        RescorerProvider multi = new MultiRescorerProvider(new SimpleModRescorerProvider(2),
                new SimpleModRescorerProvider(3));

        IDRescorer provider = multi.getRecommendToAnonymousRescorer(new long[] { 5 }, (MyrrixRecommender) null);
        assertNull(provider);

        provider = multi.getRecommendToAnonymousRescorer(new long[] { 2 }, (MyrrixRecommender) null);
        assertNotNull(provider);
        assertFalse(provider instanceof MultiRescorer);
        assertTrue(provider.isFiltered(3));
        assertFalse(provider.isFiltered(2));

        provider = multi.getRecommendToAnonymousRescorer(new long[] { 6 }, (MyrrixRecommender) null);
        assertNotNull(provider);
        assertTrue(provider instanceof MultiRescorer);
        assertTrue(provider.isFiltered(3));
        assertTrue(provider.isFiltered(2));
        assertFalse(provider.isFiltered(12));
    }

    @Test
    public void testMultiMostPopularItemsRescorer() {
        RescorerProvider multi = new MultiRescorerProvider(new SimpleModRescorerProvider(2),
                new SimpleModRescorerProvider(3));
        IDRescorer provider = multi.getMostPopularItemsRescorer(null);
        assertNotNull(provider);
        assertTrue(provider instanceof MultiRescorer);
        assertTrue(provider.isFiltered(3));
        assertTrue(provider.isFiltered(2));
        assertFalse(provider.isFiltered(6));
    }

    @Test
    public void testMultiMostSimilarItemsRescorer() {
        RescorerProvider multi = new MultiRescorerProvider(new SimpleModRescorerProvider(2),
                new SimpleModRescorerProvider(3));
        Rescorer<LongPair> provider = multi.getMostSimilarItemsRescorer((MyrrixRecommender) null);
        assertNotNull(provider);
        assertTrue(provider instanceof MultiLongPairRescorer);
        assertTrue(provider.isFiltered(new LongPair(2, 3)));
        assertTrue(provider.isFiltered(new LongPair(2, 6)));
        assertFalse(provider.isFiltered(new LongPair(6, 12)));
    }

    @Test
    public void testLoad() {
        String name = FilterHalfRescorerProvider.class.getName();
        assertNotNull(AbstractRescorerProvider.loadRescorerProviders(name + ',' + name, null));
    }

}