gistfile1.rbx

require 'rubygems'
require 'active_support'
require 'active_support/test_case'
require 'test/unit'

class Test::Unit::TestCase
  # Monkey it. T::U calls public_instance_methods(true)
  def self.suite
    method_names = public_instance_methods(false)
    tests = method_names.delete_if {|method_name| method_name !~ /^test./}
    suite = Test::Unit::TestSuite.new(name)
    tests.sort.each do
      |test|
      catch(:invalid_test) do
        suite << new(test)
      end
    end
    if (suite.empty?)
      catch(:invalid_test) do
        suite << new("default_test")
      end
    end
    suite
  end
end

class ExampleTest < Test::Unit::TestCase
  class Hello < ExampleTest
    setup :hello

    def test_hello
      assert_equal 1, @hello
      assert_nil @world # FAILS
    end

    private

    def hello
      @hello = 1
    end

    class World < Hello
      setup :world

      def test_world
        assert_equal 1, @world
        assert_equal 1, @hello
      end

      private

      def world
        @world = 1
      end
    end
  end
end