MoreStreamData

Additional generators based on StreamData.

Installation

Add more_stream_data to your list of dependencies in mix.exs

def deps do
  [
    {:more_stream_data, "~> 0.6", only: :test}
  ]
end

Refer to StreamData documentation for usage.

You can call additional generators directly in any testfile

defmodule MyTestMoule do
  use ExUnit.Case
  use ExUnitProperties

  property "strings matching regular expression" do
    regex = ~r/^[A-Z]_[a-z0-9]+$/

    check all string <- MoreStreamData.from_regex(regex) do
      assert Regex.match?(regex, string)
    end
  end
end

Roadmap

The goal is to port Python's Hypothesis built-in and external strategies considered useful for Elixir ecosystem.

• Strategies
  • integers
  • floats
    • exclude_min and exclude_max options.
  • decimal
  • emails
  • domains
  • urls
  • datetime
  • time
  • timedeltas
  • ip_address
  • from_regex
    • Newline setting (*ANYCRLF), (*NUL), etc.
    • \b word boundary
    • xHH and x{HHH...} for hex characters
    • Atomic groups: Always matches the first option
    • Lookarounds
      • Positive lookahead
      • Negative lookahead
      • Positive lookbehind
      • Negative lookbehind
    • Modifiers
      • Case insensitive /i
      • Extended /x
      • Unicode /u
      • Dotall /s
      • Multiline /m
      • Firstline /f
      • Ungreedy /U. Ignored since it does not affect string generation.
      • Export /E. Ignored since it does not affect string generation.