import org.junit.Assert;

import org.junit.Test;

import java.util.Arrays;

import java.util.Collections;

public class MergeIntervalsTest {

@Test

public void testMerge() {

MergeIntervals mi = new MergeIntervals();

Assert.assertEquals(mi.merge(Collections.singletonList(new MergeIntervals.Interval(1, 1))),

Collections.singletonList(new MergeIntervals.Interval(1, 1)));

Assert.assertEquals(mi.merge(Arrays.asList(new MergeIntervals.Interval(1, 2), new MergeIntervals.Interval(2, 2))),

Collections.singletonList(new MergeIntervals.Interval(1, 2)));

Assert.assertEquals(mi.merge(Arrays.asList(new MergeIntervals.Interval(1, 2), new MergeIntervals.Interval(4, 5), new MergeIntervals.Interval(7, 8))),

Arrays.asList(new MergeIntervals.Interval(1, 2), new MergeIntervals.Interval(4, 5), new MergeIntervals.Interval(7, 8)));

Assert.assertEquals(mi.merge(Arrays.asList(new MergeIntervals.Interval(1, 3), new MergeIntervals.Interval(2, 4))),

Collections.singletonList(new MergeIntervals.Interval(1, 4)));

Assert.assertEquals(mi.merge(Arrays.asList(new MergeIntervals.Interval(1, 4), new MergeIntervals.Interval(2, 3))),

Collections.singletonList(new MergeIntervals.Interval(1, 4)));

}

}