class Spec::Example::ExampleGroupHierarchy

def after_all_parts
  @after_all_parts ||= reverse.collect {|klass| klass.after_all_parts}.flatten
end

def after_each_parts
  @after_each_parts ||= reverse.collect {|klass| klass.after_each_parts}.flatten
end

def before_all_parts
  @before_all_parts ||= collect {|klass| klass.before_all_parts}.flatten
end

def before_each_parts
  @before_each_parts ||= collect {|klass| klass.before_each_parts}.flatten
end

def initialize(example_group_class)
  push example_group_class
  if example_group_class.respond_to?(:superclass) && example_group_class.superclass.respond_to?(:example_group_hierarchy)
    unshift example_group_class.superclass.example_group_hierarchy
    flatten!
  end
end

def nested_description_from(example_group)
  example_group.description_args.join
end

def nested_descriptions
  @nested_descriptions ||= collect {|eg| nested_description_from(eg) == "" ? nil : nested_description_from(eg) }.compact
end

def run_after_all(example)
  example.eval_each_fail_slow(after_all_parts)
end

def run_after_each(example)
  example.eval_each_fail_slow(after_each_parts)
end

def run_before_all(example)
  example.eval_each_fail_fast(before_all_parts)
end

def run_before_each(example)
  example.eval_each_fail_fast(before_each_parts)
end