module Gladys::Helpers::Default

def rand_digits(length)
  result = String.new(capacity: length)
  length.times { result << rand(10).to_s }
  result
end

def rand_string(min_len, max_len = nil)
  max_len ||= min_len
  length = min_len == max_len ? min_len : rand(min_len..max_len)
  result = String.new(capacity: length)
  length.times { result << RAND_CHARS[rand(62)] }
  result
end