ordered_vowel_words.rb

require 'rspec'

def ordered_vowel_words(words)
  words.split(" ").inject([]) do |valid_words, word|
    vowels = word.scan(/[aeiou]/)
    valid_words.tap { |w| w << word if vowels == vowels.sort }
  end.join(" ")
end

describe "#ordered_vowel_words" do
  # Write a method ordered_vowel_words that takes a string of lowercase words
  # and returns a string with just the words containing all their vowels
  # (excluding "y") in alphabetical order

  it "should return a word that has no vowels" do
    ordered_vowel_words("crypt").should == "crypt"
  end

  it "should return a word that is in order" do
    ordered_vowel_words("amends").should == "amends"
  end

  it "should not return a word that is not in order" do
    ordered_vowel_words("complicated").should_not == "complicated"
  end

  it "should be okay with double vowels" do
    ordered_vowel_words("afoot").should == "afoot"
  end

  it "should handle a word with a single vowel" do
    ordered_vowel_words("ham").should == "ham"
  end

  it "should handle a word with a single letter" do
    ordered_vowel_words("o").should == "o"
  end

  it "should ignore the letter y" do
    ordered_vowel_words("tamely").should == "tamely"
  end

  it "should properly process a mixed group of words" do
    ordered_vowel_words("this is a test of the vowel ordering system").should == "this is a test of the system"
  end
end