SoundSoftware Code Site

# Tests in this file ensure that:

#

# * the application /app/[controllers|helpers|models] and /lib 

#   paths preceed the corresponding plugin paths

# * the plugin paths are added to $LOAD_PATH in the order in which plugins are 

#   loaded

require File.dirname(__FILE__) + '/../test_helper'

class LoadPathTest < Test::Unit::TestCase

  def setup

    @load_path = expand_paths($LOAD_PATH)

  end

  # Not sure if these test actually make sense as this now essentially tests

  # Rails core functionality. On the other hand Engines relies on this to some

  # extend so this will choke if something important changes in Rails.

  # the application app/... and lib/ directories should appear

  # before any plugin directories

  def test_application_app_libs_should_precede_all_plugin_app_libs

    types = %w(app/controllers app/helpers app/models lib)

    types.each do |t|

      app_index = load_path_index(File.join(RAILS_ROOT, t))

      assert_not_nil app_index, "#{t} is missing in $LOAD_PATH"

      Engines.plugins.each do |plugin|

        first_plugin_index = load_path_index(File.join(plugin.directory, t))

        assert(app_index < first_plugin_index) unless first_plugin_index.nil?

      end

    end

  end

  # the engine directories should appear in the proper order based on

  # the order they were started  

  def test_plugin_dirs_should_appear_in_reverse_plugin_loading_order

    app_paths = %w(app/controllers/ app app/models app/helpers lib)

    app_paths.map { |p| File.join(RAILS_ROOT, p)}

    plugin_paths = Engines.plugins.reverse.collect { |plugin| plugin.load_paths.reverse }.flatten    

    expected_paths = expand_paths(app_paths + plugin_paths)    

    # only look at those paths that are also present in expected_paths so

    # the only difference would be in the order of the paths

    actual_paths = @load_path & expected_paths 

    assert_equal expected_paths, actual_paths

  end

  protected    

    def expand_paths(paths)

      paths.collect { |p| File.expand_path(p) }

    end

    def load_path_index(dir)

      @load_path.index(File.expand_path(dir))

    end  

end