Kaos

A combinator library for Erlang to generate random values and data structures.

Getting Started

58> {ok, [S]} = kaos:generate(kaos:string_of(kaos:integer(4, 9), kaos:integer($a, $z)), 112, 1).
{ok,[<<"ypwcby">>]}

Build

$ rebar3 compile

Running Example Files

$ rebar3 as examples shell

Generate Random JSON

examples/rand_json.erl

  1> rand_json:json(12).
  [
    {
      "aavquho": { "sitygndpvol": 2 },
      "butquytalbd": [
        [-8,{
            "mq": false,
            "zkcrikbkpb": 5.512894632507528
          }],
        "oeggzc",
        true
      ],
      "q": 6.649188725917739,
      "qb": [
        [false,false,"suzsscusndhq"],
        "ysvoe",
        "yjidecscisc"
      ]
    },
    false,
    false
  ]
  ok

Generate Random ASCII Graphics

examples/rand_box.erl

  2> rand_box:box().
  ╕╒╜╔╖╒╛╙╗╛╖
  ╙╝╗╙╗╙╓╝╚╛╗
  ╙╒╜╕╛╓╔╕╗╙╝
  ╗╝╚╖╝╗╕╛╕╛╘
  ╝╘╘╜╕╓╖╒╓╝╗
  ╔╘╚╜╙╘╓╕╒╜╗
  ╙╕╗╖╝╛╗╖╕╗╝
  ╓╗╛╖╚╝╓╖╒╝╕
  ╒╛╒╜╛╚╖╕╝╔╓
  ╝╓╛╖╝╚╙╕╝╛╝
  ╒╛╝╛╝╖╛╒╒╝╛
  ok

Generate Random Math Expression

examples/rand_expr.erl

  3> rand_expr:expr(3).
  ( -39 - ( ( 29 + -52 ) - ( -90 + -65 ) ) )

Generate Random Password

examples/rand_pass.erl

Generates a random password of 6 or more characters in length based on the parameter, and must satisfy:

• 2 special characters
• 1 uppercase letter
• 1 lowercase letter
• 1 number

  4> rand_pass:pass(18).
  "6+LP!J}vaj1sg(+K:("