Testing cache clearing with Rails 3.1 and Rspec

cache_book.rb

#spec/requests/cache_book_spec.rb
require 'spec_helper'

describe "CacheBook" do

    # Turn on caching
    before do
        ActionController::Base.perform_caching = true
        ActionController::Base.cache_store = :file_store, "tmp/cache"
        FileUtils.rm_rf(Dir['tmp/cache'])
    end


    it "show page cache is primed and cleared under correct cicumstances" do
        book = FactoryGirl.create(:book,:title => "Fabulous Red Dog")

        # 1. Start out with no cache
        book_path.is_action_cached?.should be_false

        # 2. Check to make sure that we do prime the cache if we visit the page
        get book_path(book)
        response.body.should have_content("Fabulous Red Dog")
        response.should be_action_cached(request)
       
        # 3. When a book is updated, check to make sure the cache is cleared
        book.title = "Fabulous Blue Cat"
        book.save!
        book_path(book).is_action_cached?.should be_false

        # 4. Visit the page again, make sure we see updated content and that the cache is re-primed
        get book_path(book)
        response.body.should have_content("Fabulous Blue Cat")
        response.should be_action_cached(request)

    end

    # Turn off caching
    after do
        ActionController::Base.perform_caching = false
        FileUtils.rm_rf(Dir['tmp/cache'])
    end

end

Rails.cache.clear > FileUtils.rm_rf