anchor.diff:      [ptty_alloc_default,
        ptty_alloc,
        ptty_alloc_pixel].
  +
  +sock() ->
  +    [connect_sock_not_passive,
  +     daemon_sock_not_passive
  +    ].
   
   %%--------------------------------------------------------------------
   init_per_suite(Config) ->
  
positive.code:     end.
  
  %%--------------------------------------------------------------------
  connect_sock_not_tcp(Config) ->
      {ok,Sock} = gen_udp:open(0, []), 
      {error, not_tcp_socket} = ssh:connect(Sock, []),
      gen_udp:close(Sock).
  
  %%--------------------------------------------------------------------
  connect_sock_not_passive(Config) ->
      {ok,Sock} = gen_tcp:connect("localhost", ?SSH_DEFAULT_PORT, []), 
      {error, not_passive_mode} = ssh:connect(Sock, []),
      gen_tcp:close(Sock).
  
  %%--------------------------------------------------------------------
  
negative.code:      max_channels_option
      ].
  groups() ->
      [{openssh, [], payload() ++ ptty() ++ sock()}].
  
  payload() ->
      [simple_exec,
       simple_exec_sock,
       small_cat,
       big_cat,
       send_after_exit].
  