rails--rails/railties/test/application/rake_test.rb

require "isolation/abstract_unit"

module ApplicationTests
  class RakeTest < Test::Unit::TestCase
    include ActiveSupport::Testing::Isolation

    def setup
      build_app
      boot_rails
      FileUtils.rm_rf("#{app_path}/config/environments")
    end
    
    def test_gems_tasks_are_loaded_first_than_application_ones
      app_file "lib/tasks/app.rake", <<-RUBY
        $task_loaded = Rake::Task.task_defined?("db:create:all")
      RUBY
      
      require "#{app_path}/config/environment"
      ::Rails.application.load_tasks
      assert $task_loaded
    end

    def test_environment_is_required_in_rake_tasks
      app_file "config/environment.rb", <<-RUBY
        SuperMiddleware = Struct.new(:app)

        Rails::Application.configure do
          config.middleware.use SuperMiddleware
        end

        Rails::Application.initialize!
      RUBY

      assert_match "SuperMiddleware", Dir.chdir(app_path){ `rake middleware` }
    end
  end
end