private void runTest(String expectedApplicationProtocol) throws Exception {
final ByteBuf clientMessage = Unpooled.copiedBuffer("I am a client".getBytes());
final ByteBuf serverMessage = Unpooled.copiedBuffer("I am a server".getBytes());
try {
writeAndVerifyReceived(clientMessage.retain(), clientChannel, serverLatch, serverReceiver);
writeAndVerifyReceived(serverMessage.retain(), serverConnectedChannel, clientLatch, clientReceiver);
if (expectedApplicationProtocol != null) {
verifyApplicationLevelProtocol(clientChannel, expectedApplicationProtocol);
verifyApplicationLevelProtocol(serverConnectedChannel, expectedApplicationProtocol);
}
} finally {