/*
* Seldon -- open source prediction engine
* =======================================
*
* Copyright 2011-2015 Seldon Technologies Ltd and Rummble Ltd (http://www.seldon.io/)
*
* ********************************************************************************************
*
* 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 io.seldon.recommendation.combiner;
import io.seldon.clustering.recommender.ItemRecommendationResultSet;
import static io.seldon.recommendation.RecommendationPeer.*;
import org.junit.Before;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static org.junit.Assert.*;
public class FirstSuccessfulCombinerTest {
RecResultContext emptySet;
RecResultContext notEnoughInEachSet;
RecResultContext sufficientSet;
RecResultContext plentySet;
List<ItemRecommendationResultSet.ItemRecommendationResult> notEnoughInEachList;
List<ItemRecommendationResultSet.ItemRecommendationResult> sufficientList;
List<ItemRecommendationResultSet.ItemRecommendationResult> plentyList;
ItemRecommendationResultSet.ItemRecommendationResult result1
= new ItemRecommendationResultSet.ItemRecommendationResult(1L, 1.0f);
ItemRecommendationResultSet.ItemRecommendationResult result2
= new ItemRecommendationResultSet.ItemRecommendationResult(2L, 2.0f);
ItemRecommendationResultSet.ItemRecommendationResult result3
= new ItemRecommendationResultSet.ItemRecommendationResult(3L, 3.0f);
@Before
public void setup(){
notEnoughInEachList = Arrays.asList(result1);
sufficientList = Arrays.asList(result2, result1);
plentyList = Arrays.asList(result3, result2, result1);
emptySet = RecResultContext.EMPTY;
notEnoughInEachSet = new RecResultContext(new ItemRecommendationResultSet(notEnoughInEachList, "notEnough"),"notEnough");
sufficientSet = new RecResultContext(new ItemRecommendationResultSet(sufficientList, "sufficient"),"sufficient");
plentySet = new RecResultContext(new ItemRecommendationResultSet(plentyList, "plenty"),"plenty");
}
@Test
public void isEnoughMethodShouldWorkCorrectly(){
FirstSuccessfulCombiner combiner = new FirstSuccessfulCombiner();
assertFalse(combiner.isEnoughResults(2, new ArrayList<RecResultContext>()));
assertFalse(combiner.isEnoughResults(2, Arrays.asList(notEnoughInEachSet, emptySet )));
assertTrue(combiner.isEnoughResults(2, Arrays.asList(sufficientSet)));
}
@Test
public void shouldCombineResultsForFirstSuccessful(){
FirstSuccessfulCombiner combiner = new FirstSuccessfulCombiner();
RecResultContext result = combiner.combine(2, Arrays.asList(sufficientSet));
assertEquals(sufficientSet.resultSet, result.resultSet);
result = combiner.combine(2, Arrays.asList(notEnoughInEachSet, sufficientSet));
assertEquals(sufficientSet.resultSet, result.resultSet);
result = combiner.combine(2, Arrays.asList(sufficientSet, plentySet));
assertEquals(sufficientSet.resultSet, result.resultSet);
}
}