gistfile1.rb

class << Test::Unit::TestCase
  def context name, &block
    (@contexts ||= [])       << name
    (@context_blocks ||= []) << block
    saved_setups    = (@context_setups ||= []).dup
    saved_teardowns = (@context_teardowns ||= []).dup

    self.instance_eval(&block)

    @context_setups     = saved_setups
    @context_teardowns  = saved_teardowns
    @contexts.pop
    @context_blocks.pop
  end

  def setup &block
    @context_setups << block
  end

  def teardown &block
    @context_teardowns << block
  end

  def should name, before = nil, &test
    context_setups    = @context_setups.dup
    context_teardowns = @context_teardowns.dup
    procs = [context_setups[0..-2], before, context_setups[-1], test, context_teardowns].flatten.compact
    define_method(["test:", @contexts, "should", name].flatten.join(" ")) do
      procs.each{|proc| self.instance_eval(&proc) }
    end
  end

  def before_should name, &test
    should(name, test){ assert true }
  end
  
  def should_eventually name
    define_method(["test:", @contexts, "should eventually", name].flatten.join(" ")) do
      STDOUT.print "X"
      assert true
    end
  end
end