@Test(expected = IllegalStateException.class)
  public void testCantSendWithInProgress() throws Exception {
    String connectionId = blockingSSLConnect(DEFAULT_SOCKET_BUF_SIZE);
    selector.poll(1000L,
        asList(SelectorTest.createSend(connectionId, "test1"), SelectorTest.createSend(connectionId, "test2")));
  }
Sending a request with one already in flight should result in an exception
ambry-network/src/test/java/com/github/ambry/network/SSLSelectorTest.java