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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
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 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.flink.training.exercises.longrides;

import org.apache.flink.training.exercises.common.datatypes.TaxiRide;
import org.apache.flink.training.exercises.testing.TaxiRideTestBase;
import org.apache.flink.training.solutions.longrides.LongRidesSolution;

import org.junit.Test;

import java.time.Instant;
import java.util.Collections;
import java.util.List;

import static org.junit.Assert.assertEquals;

public class LongRidesTest extends TaxiRideTestBase<TaxiRide> {

    static final Testable JAVA_EXERCISE = () -> LongRidesExercise.main(new String[] {});

    private static final Instant BEGINNING = Instant.parse("2020-01-01T12:00:00.00Z");

    @Test
    public void shortRide() throws Exception {
        Instant oneMinLater = BEGINNING.plusSeconds(60);
        TaxiRide rideStarted = startRide(1, BEGINNING);
        TaxiRide endedOneMinLater = endRide(rideStarted, oneMinLater);
        Long markOneMinLater = oneMinLater.toEpochMilli();

        TestRideSource source = new TestRideSource(rideStarted, endedOneMinLater, markOneMinLater);
        assert (results(source).isEmpty());
    }

    @Test
    public void outOfOrder() throws Exception {
        Instant oneMinLater = BEGINNING.plusSeconds(60);
        TaxiRide rideStarted = startRide(1, BEGINNING);
        TaxiRide endedOneMinLater = endRide(rideStarted, oneMinLater);
        Long markOneMinLater = oneMinLater.toEpochMilli();

        TestRideSource source = new TestRideSource(endedOneMinLater, rideStarted, markOneMinLater);
        assert (results(source).isEmpty());
    }

    @Test
    public void noStartShort() throws Exception {
        Instant oneMinLater = BEGINNING.plusSeconds(60);
        TaxiRide rideStarted = startRide(1, BEGINNING);
        TaxiRide endedOneMinLater = endRide(rideStarted, oneMinLater);
        Long markOneMinLater = oneMinLater.toEpochMilli();

        TestRideSource source = new TestRideSource(endedOneMinLater, markOneMinLater);
        assert (results(source).isEmpty());
    }

    @Test
    public void noEnd() throws Exception {
        TaxiRide rideStarted = startRide(1, BEGINNING);
        Long markThreeHoursLater = BEGINNING.plusSeconds(180 * 60).toEpochMilli();

        TestRideSource source = new TestRideSource(rideStarted, markThreeHoursLater);
        assertEquals(Collections.singletonList(rideStarted), results(source));
    }

    @Test
    public void longRide() throws Exception {
        TaxiRide rideStarted = startRide(1, BEGINNING);
        Long mark2HoursLater = BEGINNING.plusSeconds(120 * 60).toEpochMilli();
        TaxiRide rideEnded3HoursLater = endRide(rideStarted, BEGINNING.plusSeconds(180 * 60));

        TestRideSource source =
                new TestRideSource(rideStarted, mark2HoursLater, rideEnded3HoursLater);
        assertEquals(Collections.singletonList(rideStarted), results(source));
    }

    @Test
    public void startIsDelayedMoreThanTwoHours() throws Exception {
        TaxiRide rideStarted = startRide(1, BEGINNING);
        TaxiRide rideEndedAfter1Hour = endRide(rideStarted, BEGINNING.plusSeconds(60 * 60));
        Long mark2HoursAfterEnd = BEGINNING.plusSeconds(180 * 60).toEpochMilli();

        TestRideSource source =
                new TestRideSource(rideEndedAfter1Hour, mark2HoursAfterEnd, rideStarted);
        assert (results(source).isEmpty());
    }

    private TaxiRide testRide(long rideId, Boolean isStart, Instant startTime, Instant endTime) {
        return new TaxiRide(
                rideId,
                isStart,
                startTime,
                endTime,
                -73.9947F,
                40.750626F,
                -73.9947F,
                40.750626F,
                (short) 1,
                0,
                0);
    }

    private TaxiRide startRide(long rideId, Instant startTime) {
        return testRide(rideId, true, startTime, Instant.EPOCH);
    }

    private TaxiRide endRide(TaxiRide started, Instant endTime) {
        return testRide(started.rideId, false, started.startTime, endTime);
    }

    protected List<TaxiRide> results(TestRideSource source) throws Exception {
        Testable javaSolution = () -> LongRidesSolution.main(new String[] {});
        return runApp(source, new TestSink<>(), JAVA_EXERCISE, javaSolution);
    }
}