org.envirocar.app.test.ObfuscationTest.java Source code

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Here is the source code for org.envirocar.app.test.ObfuscationTest.java

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/* 
 * enviroCar 2013
 * Copyright (C) 2013  
 * Martin Dueren, Jakob Moellers, Gerald Pape, Christopher Stephan
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 * 
 */
package org.envirocar.app.test;

import java.util.ArrayList;
import java.util.List;

import junit.framework.Assert;

import org.envirocar.app.json.TrackEncoder;
import org.envirocar.app.model.Car;
import org.envirocar.app.model.Car.FuelType;
import org.envirocar.app.storage.Measurement;
import org.envirocar.app.storage.Track;
import org.envirocar.app.storage.TrackAlreadyFinishedException;
import org.json.JSONException;

import android.test.AndroidTestCase;

public class ObfuscationTest extends AndroidTestCase {

    private static int TARGET_LENGTH = 10;

    public void testObfuscation() throws JSONException, TrackAlreadyFinishedException {
        Track t = createTrack();
        List<Measurement> result = new TrackEncoder().getNonObfuscatedMeasurements(t, true);

        Assert.assertTrue("Unexpected element count", result.size() == TARGET_LENGTH);
    }

    private Track createTrack() throws TrackAlreadyFinishedException {
        Track result = Track.createLocalTrack();
        result.setCar(new Car(FuelType.DIESEL, "man", "mod", "id", 1234, 123));

        List<Measurement> measurements = createMeasurements();
        result.setMeasurementsAsArrayList(measurements);

        return result;
    }

    private List<Measurement> createMeasurements() {
        List<Measurement> result = new ArrayList<Measurement>();

        long start = System.currentTimeMillis();
        long end = System.currentTimeMillis() + 1000 * 60 * 100;
        Measurement first = new Measurement(54.0, 9.0);
        first.setTime(start);
        Measurement last = new Measurement(53.0, 8.0);
        last.setTime(end);

        result.add(first);
        result.add(createMeasurementNear(first, start + 60 * 1000 + 1));

        createIntermediates(result, first, last);

        result.add(createMeasurementNear(last, end - (60 * 1000 + 1)));
        result.add(last);
        return result;
    }

    private void createIntermediates(List<Measurement> result, Measurement first, Measurement last) {
        double deltaLat = first.getLatitude() - last.getLatitude();
        double deltaLong = first.getLongitude() - last.getLongitude();

        long targetTime = first.getTime() + 61 * 1000;

        for (int i = 0; i < TARGET_LENGTH / 2; i++) {
            targetTime += 10 * 1000;
            Measurement m = new Measurement(first.getLatitude() - (deltaLat / 2 + i / 10000),
                    first.getLongitude() - (deltaLong / 2 + i / 10000));
            m.setTime(targetTime);
            result.add(m);
        }

        targetTime += 10 * 1000;
        result.add(createMeasurementNear(first, targetTime));

        for (int i = TARGET_LENGTH / 2; i < TARGET_LENGTH - 1; i++) {
            targetTime += 10 * 1000;
            Measurement m = new Measurement(first.getLatitude() - (deltaLat / 2 + i / 10000f),
                    first.getLongitude() - (deltaLong / 2 + i / 10000f));
            m.setTime(targetTime);
            result.add(m);
        }
    }

    private Measurement createMeasurementNear(Measurement first, long time) {
        Measurement result = new Measurement(first.getLatitude(), first.getLongitude());
        result.setTime(time);
        return result;
    }

}