.autotest your engine plugins with your main app

.autotest

# autotest your engine plugins together with your rails app
# put this .autotest file in your rails root
# see http://code.whatcould.com/2009/02/09/gentlemen-test-your-engines.html for details

# iirc, I submitted a pull request to zentest but never heard back.
# so you'll have to use my zentest fork -- I've been trying to keep it up.
# https://github.com/whatcould/zentest -- just build the gem (rake package) and install from that file


# rewrite the Autotest::Rails #path_to_classname to include the entire test path

class Autotest::Rails < Autotest
  # Convert the pathname s to the name of class.
  
  def path_to_classname_with_test_paths(s)
    sep = File::SEPARATOR
    f = s.sub(/^(#{test_paths})#{sep}((unit|functional|fixtures|integration|views|performance|controllers|helpers)#{sep})?/, '').sub(/\.(rb|yml)$/, '').split(sep)
    f = f.map { |path| path.split(/_|(\d+)/).map { |seg| seg.capitalize }.join }
    f = f.map { |path| path =~ /Test/ ? path : "#{path}Test"  }
    f.join('::')
  end
  
  alias_method :path_to_classname_without_test_paths, :path_to_classname
  alias_method :path_to_classname, :path_to_classname_with_test_paths
  
end


Autotest.add_hook :initialize do |at|
  
  # find all your plugins with an app directory
  engine_plugins = Dir['vendor/plugins/*'].select{|dir| File.directory?("#{dir}/app")}
  
  # this bit requires my autotest fork
  at.extra_test_paths = engine_plugins.map{|p| p + '/test'} 
  
  # autotest comes with an exception for your vendor; have to get rid of that
  at.remove_exception(%r%^\./(?:db|doc|log|public|script|tmp|vendor)%)
  at.add_exception %r%^\./(?:db|doc|log|public|script|tmp)%
  at.add_exception(/^\.\/vendor\/rails/)
  at.add_exception(/^\.\/vendor\/gems/)

  # exceptions for all your non-engine plugins
  plugin_names = engine_plugins.map{|p| p.sub('vendor/plugins/','')}
  at.add_exception(%r%vendor/plugins/(?!#{plugin_names.join('|')})%)
  
  engine_plugins.each do |plugin_path|

    at.add_exception("#{plugin_path}/db")

    # these mirror the mappings in the autotest rails profile 
    #
    # TODO: these don't account for overriding methods, views, etc in your app
    # eg, a change in your main app/ doesn't run the corresponding test in the plugin/app 

  # fixtures
    at.add_mapping %r%^#{plugin_path}/test/fixtures/(.*)s.yml% do |_, m|
      ["#{plugin_path}/test/unit/#{m[1]}_test.rb",
       "#{plugin_path}/test/controllers/#{m[1]}_controller_test.rb",
       "#{plugin_path}/test/views/#{m[1]}_view_test.rb",
       "#{plugin_path}/test/functional/#{m[1]}_controller_test.rb"]
    end

    at.add_mapping %r%^#{plugin_path}/app/models/(.*)\.rb$% do |_, m|
      "#{plugin_path}/test/unit/#{m[1]}_test.rb"
    end

    at.add_mapping %r%^#{plugin_path}/app/controllers/(.*)\.rb$% do |_, m|
      ["#{plugin_path}/test/controllers/#{m[1]}_test.rb",
      "#{plugin_path}/test/functional/#{m[1]}_test.rb"]
    end

    at.add_mapping %r%^#{plugin_path}/app/helpers/(.*)_helper.rb% do |_, m|
      ["#{plugin_path}/test/views/#{m[1]}_view_test.rb",
      "#{plugin_path}/test/functional/#{m[1]}_controller_test.rb"]
    end

    at.add_mapping %r%^#{plugin_path}/app/views/(.*)/% do |_, m|
      ["#{plugin_path}/test/views/#{m[1]}_view_test.rb",
      "#{plugin_path}/test/functional/#{m[1]}_controller_test.rb"]
    end

    # changes in routes test your app functional tests as well
    
    at.add_mapping %r%^#{plugin_path}/config/routes.rb$% do 
      at.files_matching %r%^(#{plugin_path}/)?test/(controllers|views|functional)/.*_test\.rb$%
    end

    at.add_mapping %r%^#{plugin_path}/test/(unit|integration|controllers|views|functional)/.*rb$% do |filename, _|
      filename
    end
    
  end

  # keeps your fixtures updated in the shared tmp dir. 
  # see rake test:plugins:setup_plugin_fixtures
  # if you specify your temporary_fixtures_directory for some reason,
  # you should change tmp_dir below

  Autotest.add_hook :updated do |at,*args|
    filenames = args.collect{|arr|arr.first.first}.uniq
    filenames.each do |filename|
      if filename =~ /.(yml|csv)$/
        require 'tempfile'
        tmp_dir = FileUtils.mkdir_p(File.join(Dir.tmpdir, "rails_fixtures"))
        FileUtils.copy(filename,tmp_dir)
      end
    end
  end

end