BoundedPriorityQueueTest.java

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package org.openjdk.jmh.util;

import org.junit.Assert;
import org.junit.Test;

import java.util.Collections;
import java.util.Queue;

public class BoundedPriorityQueueTest {
    @Test
    public void top3Smallest() {
        Queue<Integer> queue = new BoundedPriorityQueue<>(3);
        queue.add(50);
        queue.add(40);
        queue.add(10);
        queue.add(20);
        queue.add(30);
        queue.add(30);
        queue.add(80);

        Assert.assertEquals(3, queue.size());
        Assert.assertEquals((Integer) 30, queue.poll());
        Assert.assertEquals((Integer) 20, queue.poll());
        Assert.assertEquals((Integer) 10, queue.poll());
    }

    @Test
    public void top3Largest() {
        Queue<Integer> queue = new BoundedPriorityQueue<>(3, Collections.reverseOrder());
        queue.add(50);
        queue.add(40);
        queue.add(10);
        queue.add(20);
        queue.add(30);
        queue.add(30);
        queue.add(80);

        Assert.assertEquals(3, queue.size());
        Assert.assertEquals((Integer) 40, queue.poll());
        Assert.assertEquals((Integer) 50, queue.poll());
        Assert.assertEquals((Integer) 80, queue.poll());
    }

}