code: @Test public void testGetProtocol() throws Exception {
    Draft_6455 draft_6455=new Draft_6455();
    assertNull(draft_6455.getProtocol());
    draft_6455.acceptHandshakeAsServer(handshakedataProtocolExtension);
    assertNull(draft_6455.getProtocol());
    draft_6455=new Draft_6455(Collections.<IExtension>emptyList(),Collections.<IProtocol>singletonList(new Protocol("chat")));
    assertNull(draft_6455.getProtocol());
    draft_6455.acceptHandshakeAsServer(handshakedataProtocolExtension);
    assertNotNull(draft_6455.getProtocol());
  }
  