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:("