Add a palidrome? method to the Ruby String ojbect. Completely pointless.

palindrome.rb

class String
  def palindrome?
    self.gsub!(/[[:punct:][:space:]]/, '')
    self.downcase == self.downcase.reverse
  end
end  

palindrome_spec.rb

require File.join(File.dirname(__FILE__), '../palindrome')

describe String do
  it "should have a palindrome? method" do
    "String".should respond_to :palindrome?
  end

  it "should acknowledge a valid palindrome" do
    valid_palindromes = [
      "Madam, I'm Adam.",
      "Do geese see God?",
      "Was it Eliot's toilet I saw?",
      "Murder for a jar of red rum."
    ]
    valid_palindromes.each do |p|
      p.palindrome?.should be_true
    end
  end

  it "should reject non-valid palindromes" do
    "blah blah blah".palindrome?.should be_false
  end
end