Generates missing specs and factories. NB assumes you have GenericSpecForModels module defined somewhere (just drop in lib/tasks)

rspec_and_factory_tasks.rake

class MissingSpecGenerator
  #based on https://gist.github.com/537795 by tcoccara
  def spec_file(spec_path, file_name, spec_template, namespace)
    spec_name = file_name.gsub('.rb', '') + '_spec.rb'
    if File.exist?("#{spec_path}/#{spec_name}")
      puts "#{spec_path}/#{spec_name} exists"
    else
      puts "#{spec_path}/#{spec_name} missing"
      puts "\n"
      spec_file = ERB.new(spec_template)
      class_name = "#{namespace}#{file_name.gsub('.rb', '').camelcase}"
      spec = spec_file.result(binding)
      puts spec
      FileUtils.mkdir_p(spec_path) unless File.exist?(spec_path)
      File.open("#{spec_path}/#{spec_name}", 'w') {|f| f.write(spec) }
      puts "\n"
    end
  end

  def factory_file(file_name, template, namespace)
    spec_path = ::Rails.root.to_s + '/spec/factories/'
    spec_name = file_name.gsub('.rb', '') + '_factory.rb'

    if File.exist?("#{spec_path}/#{spec_name}")
      puts "#{spec_path}/#{spec_name} exists"
    else
      puts "#{spec_path}/#{spec_name} missing"
      puts "\n"
      spec_file = ERB.new(template)
      factory_name = file_name.gsub('.rb', '')
      spec = spec_file.result(binding)
      puts spec
      FileUtils.mkdir_p(spec_path) unless File.exist?(spec_path)
      File.open("#{spec_path}/#{spec_name}", 'w') {|f| f.write(spec) }
      puts "\n"
    end
  end

  def traverse_models(path, spec_template, namespace = '')
    Dir.open( ::Rails.root.to_s + '/app/' + path).each do |file_name|
      unless file_name.match(/^\./) #skip hidden folders (.svn)
        if File.directory?( ::Rails.root.to_s + '/app/' + path + '/' + file_name)
          traverse_models("#{path}/#{file_name}", spec_template, "#{namespace}#{file_name.camelcase}::")
        else
          factory_file(file_name, spec_template, namespace)
        end
      end
    end
  end


  def traverse_specs(path, spec_template, namespace = '')
    Dir.open( ::Rails.root.to_s + '/app/' + path).each do |file_name|
      unless file_name.match(/^\./) #skip hidden folders (.svn)
        if File.directory?( ::Rails.root.to_s + '/app/' + path + '/' + file_name)
          traverse_specs("#{path}/#{file_name}", spec_template, "#{namespace}#{file_name.camelcase}::")
        else
          spec_file("#{ ::Rails.root.to_s}/spec/#{path}", file_name, spec_template, namespace)
        end
      end
    end
  end

  def generate_missing_helper_specs
    helper_template = %q{require 'spec_helper'

      describe <%= class_name %> do

        #Delete this example and add some real ones or delete this file
        it "should be included in the object returned by #helper" do
          included_modules = (class << helper; self; end).send :included_modules
          included_modules.should include(<%= class_name %>Helper)
        end

      end
      }.gsub(/^      /, '')
    traverse_specs('helpers', helper_template)
  end

  def generate_missing_controller_specs
    controller_template = %q{require 'spec_helper'

      describe <%= class_name %> do

        #Delete this example and add some real ones
        it "should use <%= class_name %>" do
          controller.should be_an_instance_of(<%= class_name %>)
        end

      end
      }.gsub(/^      /, '')
    traverse_specs('controllers', controller_template)
  end

  def generate_missing_model_specs
    model_template = %q{require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')
      describe <%= class_name %> do
        include GenericSpecForModels
      end
      }.gsub(/^      /, '')
    traverse_specs('models', model_template)
  end

  def generate_missing_factories
    factory_template = %q{Factory.define :<%= factory_name %> do |factory|
      end
    }.gsub(/^      /, '')
    traverse_models('models', factory_template)
  end

end


namespace :spec do
  desc "Generate the missing rspec files, and factory girl factories using inline template"
  task :generate_missing => :environment do
    msg = MissingSpecGenerator.new()
    msg.generate_missing_helper_specs
    msg.generate_missing_controller_specs
    msg.generate_missing_model_specs
    msg.generate_missing_factories
  end
end