duck punchin' #to_cents method and some tests

cents.rb

class String
  def to_cents
    regex = /[\,$]/
    if self.match(regex)
      self.gsub!(regex, "")
    end
        
    if self.match(/\./)
      dollars, change = self.split(".")
      (dollars + change).to_i
    else
      self.to_i * 100
    end
  end
end

class Float
  def to_cents
    self.to_i * 100
  end
end

class Fixnum
  def to_cents
    self * 100
  end
end

spex.rb

require './cents.rb'

describe String do
  describe "to_cents" do
    it "should convert currency in strings with commas into cents properly" do
      "1,000".to_cents.should == 100000
    end
    
    it "should convert currency strings with commas and decimals properly" do
      "1,000.00".to_cents.should == 100000
    end
    
    it "should convert currency strings properly" do
      "1000".to_cents.should == 100000
    end
    
    it "should convert currency strings with change properly" do
      "1000.23".to_cents.should == 100023
    end
    
    it "should convert currency strings with commas and change properly" do
      "1,100.23".to_cents.should == 110023
    end
    
    it "should convert currency strings with commas decimals and dolla signs properly" do
      "$1,100.23".to_cents.should == 110023
    end
  end
end

describe Float do
  describe "to_cents" do
    it "should convert whole values with change properly" do
      1000.00.to_cents.should == 100000
    end
  end
end

describe Fixnum do
  describe "to_cents" do
    it "should convert whole values without change properly" do
      1000.to_cents.should == 100000
    end
  end
end