@After
  public void after() {
    Map<String, Meter> meters = routerMetricRegistry.getMeters();
    Assert.assertTrue("Router should have been sent",
        meters.get(transmissionSendBytesMetricName).getCount() != transmissionSendBytesCountBeforeTest);
    Assert.assertTrue("Router should have been sent",
        meters.get(transmissionReceiveBytesMetricName).getCount() != transmissionReceiveBytesCountBeforeTest);
  }
Instantiates {@link RouterServerPlaintextTest}
@param testEncryption {@code true} if blobs need to be tested w/ encryption. {@code false} otherwise
ambry-server/src/integration-test/java/com/github/ambry/server/RouterServerPlaintextTest.java