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/*
* Copyright (C) 2015 The Android Open Source Project
*
* 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 com.android.tv.recommendation;
import static android.support.test.InstrumentationRegistry.getContext;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import com.android.tv.data.Channel;
import com.android.tv.recommendation.RecommendationUtils.ChannelRecordSortedMapHelper;
import com.android.tv.recommendation.Recommender.Evaluator;
import com.android.tv.testing.Utils;
import org.junit.Before;
import java.util.ArrayList;
import java.util.List;
/**
* Base test case for Recommendation Evaluator Unit tests.
*/
public abstract class EvaluatorTestCase<T extends Evaluator> {
private static final long INVALID_CHANNEL_ID = -1;
private static final double SCORE_DELTA = 0.01;
private ChannelRecordSortedMapHelper mChannelRecordSortedMap;
private RecommendationDataManager mDataManager;
public T mEvaluator;
@Before
public void setUp() {
mChannelRecordSortedMap = new ChannelRecordSortedMapHelper(getContext());
mDataManager = RecommendationUtils
.createMockRecommendationDataManager(mChannelRecordSortedMap);
Recommender mRecommender = new FakeRecommender();
mEvaluator = createEvaluator();
mEvaluator.setRecommender(mRecommender);
mChannelRecordSortedMap.setRecommender(mRecommender);
mChannelRecordSortedMap.resetRandom(Utils.createTestRandom());
}
/**
* Each evaluator test has to create Evaluator in {@code mEvaluator}.
*/
public abstract T createEvaluator();
public void addChannels(int numberOfChannels) {
mChannelRecordSortedMap.addChannels(numberOfChannels);
}
public Channel addChannel() {
return mChannelRecordSortedMap.addChannel();
}
public void addRandomWatchLogs(long watchStartTimeMs, long watchEndTimeMs,
long maxWatchDurationMs) {
assertTrue(mChannelRecordSortedMap.addRandomWatchLogs(watchStartTimeMs, watchEndTimeMs,
maxWatchDurationMs));
}
public void addWatchLog(long channelId, long watchStartTimeMs, long durationTimeMs) {
assertTrue(mChannelRecordSortedMap.addWatchLog(channelId, watchStartTimeMs,
durationTimeMs));
}
public List<Long> getChannelIdListSorted() {
return new ArrayList<>(mChannelRecordSortedMap.keySet());
}
public long getLatestWatchEndTimeMs() {
long latestWatchEndTimeMs = 0;
for (ChannelRecord channelRecord : mChannelRecordSortedMap.values()) {
latestWatchEndTimeMs = Math.max(latestWatchEndTimeMs,
channelRecord.getLastWatchEndTimeMs());
}
return latestWatchEndTimeMs;
}
/**
* Check whether scores of each channels are valid.
*/
protected void assertChannelScoresValid() {
assertEqualScores(Evaluator.NOT_RECOMMENDED,
mEvaluator.evaluateChannel(INVALID_CHANNEL_ID));
assertEqualScores(Evaluator.NOT_RECOMMENDED,
mEvaluator.evaluateChannel(mChannelRecordSortedMap.size()));
for (long channelId : mChannelRecordSortedMap.keySet()) {
double score = mEvaluator.evaluateChannel(channelId);
assertTrue("Channel " + channelId + " score of " + score + "is not valid",
score == Evaluator.NOT_RECOMMENDED || (0.0 <= score && score <= 1.0));
}
}
/**
* Notify that loading channels and watch logs are finished.
*/
protected void notifyChannelAndWatchLogLoaded() {
mEvaluator.onChannelRecordListChanged(new ArrayList<>(mChannelRecordSortedMap.values()));
}
void assertEqualScores(double expected, double actual) {
assertEquals(expected, actual, SCORE_DELTA);
}
void assertEqualScores(String message, double expected, double actual) {
assertEquals(message, expected, actual, SCORE_DELTA);
}
private class FakeRecommender extends Recommender {
public FakeRecommender() {
super(new Recommender.Listener() {
@Override
public void onRecommenderReady() {
}
@Override
public void onRecommendationChanged() {
}
}, true, mDataManager);
}
@Override
public ChannelRecord getChannelRecord(long channelId) {
return mChannelRecordSortedMap.get(channelId);
}
}
}
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