module Test::Unit::Util::BacktraceFilter
  alias_method :noisy_filter_backtrace, :filter_backtrace
  def quiet_filter_backtrace(backtrace)
    noisy_filter_backtrace(backtrace)
    backtrace.reject! do |line|
      line.include?("#{RAILS_ROOT}/vendor") ||
      (line.include?("ruby") && line.include?("/test/unit")) ||
      line.include?("ruby/gems")
    end
    backtrace.each do |line|
      line.slice!((line =~ /:in /)..line.length) if (line =~ /:in /)
    end
  end
  alias_method :filter_backtrace, :quiet_filter_backtrace
end