Create random pronounceable strings

random_pronounceable_string.rb

module RandomPronounceableString
  VOWELS = "aeiou"
  CONSONANTS = "bcdfghjklmnprstvwyz"

  def random_pronounceable
    %(#{random_consonant}#{random_vowel}#{random_consonant}#{random_vowel}#{random_consonant}#{random_vowel})
  end

  def random_vowel
    random_letter(VOWELS)
  end

  def random_consonant
    random_letter(CONSONANTS)
  end

  def random_letter(letters)
    letters[rand(letters.length)].chr
  end
end

random_pronounceable_string_test.rb

require 'test/unit'
require 'random_pronounceable_string'

class RandomPronounceableStringTest < Test::Unit::TestCase
  include RandomPronounceableString
  
  def test_random_pronounceable
    assert_not_equal random_pronounceable, random_pronounceable
  end
end