@Test
  public void testWakeup() {
    Assert.assertFalse("Selector should not have been woken up at this point", selector.getAndClearWokenUpStatus());
    networkClient.wakeup();
    Assert.assertTrue("Selector should have been woken up at this point", selector.getAndClearWokenUpStatus());
  }
Test that the SocketNetworkClient wakeup wakes up the associated Selector.
ambry-network/src/test/java/com/github/ambry/network/SocketNetworkClientTest.java