@Test
public void testDifferentPriority() {

    Request request = new Request("a");
    request.setPriority(100);
    priorityScheduler.push(request,task);
    request = new Request("b");
    request.setPriority(900);
    priorityScheduler.push(request,task);
    request = new Request("c");
    priorityScheduler.push(request,task);
    request = new Request("d");
    request.setPriority(-900);
    priorityScheduler.push(request,task);
    Request poll = priorityScheduler.poll(task);
    Assert.assertEquals("b",poll.getUrl());
    poll = priorityScheduler.poll(task);
    Assert.assertEquals("a",poll.getUrl());
    poll = priorityScheduler.poll(task);
    Assert.assertEquals("c",poll.getUrl());
    poll = priorityScheduler.poll(task);
    Assert.assertEquals("d",poll.getUrl());
}