@Override
  public BackupRequestsStrategyStats getStats()
  {
    return getStats(_lastDelayStats.get());
  }
@Test
  public void testNoActivityStats()
  {
    TrackingBackupRequestsStrategy trackingStrategy =
        new TrackingBackupRequestsStrategy(new MockBackupRequestsStrategy(() -> Optional.of(10000000L), () -> true));
    BackupRequestsStrategyStats stats = trackingStrategy.getStats();
    assertNotNull(stats);
    assertEquals(stats.getAllowed(), 0);
    assertEquals(stats.getSuccessful(), 0);
    assertEquals(stats.getMinDelayNano(), 0);
    assertEquals(stats.getMaxDelayNano(), 0);
    assertEquals(stats.getAvgDelayNano(), 0);
    stats = trackingStrategy.getStats();
    assertNotNull(stats);
    assertEquals(stats.getAllowed(), 0);
    assertEquals(stats.getSuccessful(), 0);
    assertEquals(stats.getMinDelayNano(), 0);
    assertEquals(stats.getMaxDelayNano(), 0);
    assertEquals(stats.getAvgDelayNano(), 0);
  }