anchor.diff:  -else.
   test_with_rand(_Config) ->
       ?assert(lists:member(erlang:system_info(otp_release), ["R14B04", "R15B",
  -                                                           "R16B"])),
  +                                                           "R16B", "17"])),
       ok.
   -endif.
   
  
positive.code:     ok.
  -else.
  test_HAVE_ERLANG_NOW(_Config) ->
      ?assert(lists:member(erlang:system_info(otp_release), ["R14B04", "R15B",
                                                             "R16B", "18", "19",
                                                             "21", "22"])),
      ok.
  -endif.
  
negative.code: 
  -ifdef(with_maps).
  test_with_maps(_Config) ->
      ?assert(lists:member(erlang:system_info(otp_release), ["18", "19",
                                                             "20", "21", "22"])),
      ok.
  -else.
  test_with_maps(_Config) ->
      ?assert(lists:member(erlang:system_info(otp_release), ["R14B04", "R15B",
                                                             "R16B", "17"])),
      ok.
  -endif.
  
  