class Bacon::Context

def run_requirement(description, spec)
  Bacon.handle_requirement description do
    begin
      Counter[:depth] += 1
      rescued = false
      begin
        @before.each { |block| instance_eval(&block) }
        prev_req = Counter[:requirements]
        instance_eval(&spec)
      rescue Object => e
        rescued = true
        raise e
      ensure
        if Counter[:requirements] == prev_req and not rescued
          raise Error.new(:missing,
                          "empty specification: #{@name} #{description}")
        end
        begin
          @after.each { |block| instance_eval(&block) }
        rescue Object => e
          raise e  unless rescued
        end
      end
    rescue Object => e
      ErrorLog << "#{e.class}: #{e.message}\n"
      e.backtrace.find_all { |line| line !~ /bin\/bacon|\/bacon\.rb:\d+/ }.
        each_with_index { |line, i|
        ErrorLog << "\t#{line}#{i==0 ? ": #@name - #{description}" : ""}\n"
      }
      ErrorLog << "\n"
      if e.kind_of? Error
        Counter[e.count_as] += 1
        e.count_as.to_s.upcase
      else
        Counter[:errors] += 1
        "ERROR: #{e.class}"
      end
    else
      ""
    ensure
      Counter[:depth] -= 1
    end
  end
end