RSpec formatter with timed outputs

timed_formatter.rb

require 'rspec/core/formatters/documentation_formatter'

class TimedFormatter <  RSpec::Core::Formatters::DocumentationFormatter
  def example_passed(example)
    output.puts "#{passed_output(example)} - #{example.execution_result[:run_time]}"
  end

  def example_failed(example)
    output.puts "#{failure_output(example, example.execution_result[:exception])} - #{example.execution_result[:run_time]}"
  end
end