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lib/faker/random.ex
defmodule Faker.Random do
@moduledoc """
Behaviour that defines randomisation in faker.
"""
@callback random_between(integer, integer) :: integer
@callback random_bytes(pos_integer) :: binary
@callback random_uniform() :: float
defmacro __using__(_) do
quote do
@behaviour Faker.Random
def random_between(left, right) do
Enum.random(left..right)
end
def random_bytes(total) do
:crypto.strong_rand_bytes(total)
end
def random_uniform do
:rand.uniform()
end
defoverridable random_between: 2, random_bytes: 1, random_uniform: 0
end
end
end