gistfile1.rb

# spec -cfs user_spec.rb
require 'rubygems'
require 'aasm'
require 'active_record'
require 'fileutils'

FileUtils.rm_f('dbfile')
ActiveRecord::Base.establish_connection(:adapter => "sqlite3", :database => "dbfile")
ActiveRecord::Schema.create_table(:users) do |t|
  t.string :name
  t.string :state
end

class User < ActiveRecord::Base
  include AASM
  aasm_column :state
  aasm_initial_state :pending  
  aasm_state :pending
  aasm_state :current, :enter => :deliver
  aasm_state :old, :enter => :end_now

  aasm_event :activate do
    transitions :from => :pending, :to => :current
  end

  aasm_event :expire do
    transitions :from => :current, :to => :old
  end

  def deliver
  end

  def end_now
  end
end

describe User do
  it "should transition from pending to current with activate! event" do
    my_obj = User.create!(:name => 'foo')
    my_obj.activate!
    my_obj.state.should eql('current')
  end
      
  it "should transition from current to old with expire! event" do
    my_obj = User.create!(:name => 'bar')
    my_obj.activate!
    my_obj.state.should eql('current')
    my_obj.expire!
    my_obj.state.should eql('old')
  end
end