gistfile1.rb

class Test::Unit::TestCase

  def self.should_have_before_filter(expected_method, options = {})
    should_have_filter('before', expected_method, options)
  end
  
  def self.should_have_after_filter(expected_method, options = {})
    should_have_filter('after', expected_method, options)
  end
  
  protected
  
    def self.should_have_filter(filter_type, expected_method, options)
      description = "have #{filter_type}_filter :#{expected_method}"
      description << " with #{options.inspect}" unless options.empty?

      should description do
        klass = "action_controller/filters/#{filter_type}_filter".classify.constantize
        expected = klass.new(:filter, expected_method.to_sym, options)
        assert_equal 1, @controller.class.filter_chain.select { |filter|
          filter.method == expected.method && filter.kind == expected.kind &&
          filter.options == expected.options && filter.class == expected.class
        }.size
      end
    end
end