/** {@inheritDoc} */
  @Override
  protected void beforeTest() throws Exception {
    sndCnt = router.getSendCount();
    rcvCnt = router.getReceivedCount();

    super.beforeTest();
  }
  /** {@inheritDoc} */
  @Override
  protected void afterTest() throws Exception {
    super.afterTest();

    assert router.getSendCount() > sndCnt
        : "Failed to ensure network activity [currCnt="
            + router.getSendCount()
            + ", oldCnt="
            + sndCnt
            + ']';
    assert router.getReceivedCount() > rcvCnt
        : "Failed to ensure network activity [currCnt="
            + router.getReceivedCount()
            + ", oldCnt="
            + rcvCnt
            + ']';
  }