code: @Test public void testConstructor() throws Exception {
    try {
      Draft_6455 draft_6455=new Draft_6455(null,null);
      fail("IllegalArgumentException expected");
    }
   catch (  IllegalArgumentException e) {
    }
    try {
      Draft_6455 draft_6455=new Draft_6455(Collections.<IExtension>emptyList(),null);
      fail("IllegalArgumentException expected");
    }
   catch (  IllegalArgumentException e) {
    }
    try {
      Draft_6455 draft_6455=new Draft_6455(null,Collections.<IProtocol>emptyList());
      fail("IllegalArgumentException expected");
    }
   catch (  IllegalArgumentException e) {
    }
    Draft_6455 draft_6455=new Draft_6455(Collections.<IExtension>emptyList(),Collections.<IProtocol>emptyList());
    assertEquals(1,draft_6455.getKnownExtensions().size());
    assertEquals(0,draft_6455.getKnownProtocols().size());
  }
  