spec_helper.rb

require "rake-pipeline"
require "rake-pipeline-web-filters"

class Rake::Pipeline
  module SpecHelpers

    class MemoryFileWrapper < Struct.new(:root, :path, :encoding, :body)
      @@files = {}

      def self.files
        @@files
      end

      def with_encoding(new_encoding)
        self.class.new(root, path, new_encoding, body)
      end

      def fullpath
        File.join(root, path)
      end

      def create
        @@files[fullpath] = self
        self.body = ""
        yield
      end

      alias read body

      def write(contents)
        self.body << contents
      end
    end

    # TODO: OS agnostic modules
    module FileUtils
      def mkdir_p(dir)
        system "mkdir", "-p", dir
      end

      def touch(file)
        system "touch", file
      end

      def rm_rf(dir)
        system "rm", "-rf", dir
      end

      def touch_p(file)
        dir = File.dirname(file)
        mkdir_p dir
        touch file
      end

      def age_existing_files
        old_time = Time.now - 10
        Dir[File.join(tmp, "**/*.js")].each do |file|
          File.utime(old_time, old_time, file)
        end
      end
    end

    module Filters
      ConcatFilter = Rake::Pipeline::ConcatFilter
      MemoryFileWrapper = Rake::Pipeline::SpecHelpers::MemoryFileWrapper

      class StripAssertsFilter < Rake::Pipeline::Filter
        def generate_output(inputs, output)
          inputs.each do |input|
            output.write input.read.gsub(%r{^\s*assert\(.*\)\s*;?\s*$}m, '')
          end
        end
      end
    end
  end
end

RSpec.configure do |config|
  original = Dir.pwd

  config.include Rake::Pipeline::SpecHelpers::FileUtils

  def tmp
    File.expand_path("../tmp", __FILE__)
  end

  config.before do
    rm_rf(tmp)
    mkdir_p(tmp)
    Dir.chdir(tmp)
  end

  config.after do
    Dir.chdir(original)
  end
end