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b/recommendation-engine/src/test/java/eu/alfred/recommendation_engine/EventWeightsCalculatorTests.java |
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package eu.alfred.recommendation_engine;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import eu.alfred.event_manager.model.*;
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import org.junit.Before;
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import org.junit.Test;
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import static org.junit.Assert.assertEquals;
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public class EventWeightsCalculatorTests {
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private EventWeightsCalculator eWCalc = new EventWeightsCalculator();
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private Map<Event,Integer> initialEvents;
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private Set<Event> eventsToBeAdded = new HashSet<Event>();
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Event eventA = new Event();
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Event eventB = new Event();
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Event eventC = new Event();
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Event eventD = new Event();
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Event eventE = new Event();
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@Before
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public void setup() {
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initialEvents = new HashMap<Event,Integer>();
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eventA.setEventID("eventA");
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eventB.setEventID("eventB");
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eventC.setEventID("eventC");
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eventD.setEventID("eventD");
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eventE.setEventID("eventE");
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eventsToBeAdded.add(eventA);
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eventsToBeAdded.add(eventB);
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eventsToBeAdded.add(eventC);
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}
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@Test
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public void testAssignWeightsToEventsWithEmptyInitialEvents() {
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int weightToBeAssigned = 2;
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eWCalc.assignWeightsToEvents(initialEvents, eventsToBeAdded, weightToBeAssigned);
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assertEquals(new Integer(weightToBeAssigned),initialEvents.get(eventA));
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assertEquals(new Integer(weightToBeAssigned),initialEvents.get(eventB));
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assertEquals(new Integer(weightToBeAssigned),initialEvents.get(eventC));
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}
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@Test
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public void testAssignWeightsToEventsWithPresentInitialEvents() {
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// assign initial weight to some events
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int weightForPreExistingEvents = 3;
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eWCalc.assignWeightsToEvents(initialEvents, eventsToBeAdded, weightForPreExistingEvents);
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assertEquals(new Integer(weightForPreExistingEvents),initialEvents.get(eventA));
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assertEquals(new Integer(weightForPreExistingEvents),initialEvents.get(eventB));
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assertEquals(new Integer(weightForPreExistingEvents),initialEvents.get(eventC));
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eventsToBeAdded.add(eventD);
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eventsToBeAdded.add(eventE);
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int weightToBeAssigned = 2;
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eWCalc.assignWeightsToEvents(initialEvents, eventsToBeAdded, weightToBeAssigned);
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assertEquals(new Integer(weightToBeAssigned+weightForPreExistingEvents),initialEvents.get(eventA));
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assertEquals(new Integer(weightToBeAssigned+weightForPreExistingEvents),initialEvents.get(eventB));
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assertEquals(new Integer(weightToBeAssigned+weightForPreExistingEvents),initialEvents.get(eventC));
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assertEquals(new Integer(weightToBeAssigned),initialEvents.get(eventD));
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assertEquals(new Integer(weightToBeAssigned),initialEvents.get(eventE));
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}
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@Test
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public void testRankingBasedOnWeights() {
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int weightToBeAssigned = 2;
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eWCalc.assignWeightsToEvents(initialEvents, eventsToBeAdded, weightToBeAssigned);
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Set<Event> additionalEvents = new HashSet<Event>();
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additionalEvents.add(eventC);
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int extraWeight = 5;
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eWCalc.assignWeightsToEvents(initialEvents, additionalEvents, extraWeight);
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List<Event> sortedEvents = eWCalc.sortByWeight(initialEvents);
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assertEquals(sortedEvents.get(0),eventC);
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}
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}
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