@VisibleForTesting
  public void setSizeBasedWeight(boolean sizeBasedWeight) {
   this.sizeBasedWeight = sizeBasedWeight;
  }
@Test
  public void testOrderingUsingAppSubmitTime() {
    FairOrderingPolicy<MockSchedulableEntity> policy =
        new FairOrderingPolicy<>();
    policy.setSizeBasedWeight(true);
    MockSchedulableEntity r1 = new MockSchedulableEntity();
    MockSchedulableEntity r2 = new MockSchedulableEntity();

    // R1, R2 has been started at same time
    assertEquals(r1.getStartTime(), r2.getStartTime());

    // No changes, equal
    assertEquals("Comparator Output", 0,
        policy.getComparator().compare(r1, r2));

    // R2 has been started after R1
    r1.setStartTime(5);
    r2.setStartTime(10);

    Assert.assertTrue(policy.getComparator().compare(r1, r2) < 0);

    // R1 has been started after R2
    r1.setStartTime(10);
    r2.setStartTime(5);

    Assert.assertTrue(policy.getComparator().compare(r1, r2) > 0);
  }