@Test
  public void notEnoughReplicasToMeetTargetTest() {
    initialize();
    try {
      getOperationTrackerForGetOrPut(true, 13, 3, RouterOperation.GetBlobOperation, true);
      fail("Should have failed to construct tracker because success target > replica count");
    } catch (IllegalArgumentException e) {
      // expected. Nothing to do.
    }
  }
Tests the case when the success target > number of replicas.
ambry-router/src/test/java/com/github/ambry/router/OperationTrackerTest.java