@Test
  public void testLeaseTime() throws Exception {
    RoundRobinSchedulerStats stats = new RoundRobinSchedulerStats();
    assertEquals("Wrong default lease time.", 0, stats.getTotalLeaseTime());
    assertEquals("Wrong default lease count.", 0, stats.getTotalLeaseCount());

    assertEquals("Wrong average lease time.", 0.0f, stats.getAverageLeaseTime());

    stats.addLeaseTime(3000);
    stats.addLeaseTime(1500);
    assertEquals("Wrong average lease time.", 4500 / 2.0f, stats.getAverageLeaseTime());
  }