app "roctorrent"
    packages { pf: "https://github.com/roc-lang/basic-cli/releases/download/0.5.0/Cufzl36_SnJ4QbOoEmiJ5dIpUxBvdB3NEySvuH82Wio.tar.br" }
    imports [pf.Stdout]
    provides [main] to pf


bDecodeStr: List U8 -> Result (List U8) [Malformatted]
bDecodeStr = \i ->
  List.splitFirst i ':'
  |> Result.mapErr \_err -> Malformatted
  |> Result.map \{before, } -> before

expect 
  res = bDecodeStr (Str.toUtf8 "foo")
  res == Err Malformatted


main = 
  Stdout.line "Hello, World"