say_formatter.rb

require 'rspec/core/formatters/progress_formatter'

# Custom RSpec formatter that speaks aloud using the say command, if available.
# Not to be taken too seriously, but fun for annoying your coworkers.
# Usage: bundle exec rspec -r ./say_formatter.rb -f SayFormatter spec

class SayFormatter < RSpec::Core::Formatters::ProgressFormatter
  VOICES = %w[Agnes Albert Alex Bad\ News Bahh Bells Boing Bruce Bubbles Cellos
              Deranged Fred Good\ News Hysterical Junior Kathy Pipe\ Organ
              Princess Ralph Trinoids Vicki Victoria Whisper Zarvox]

  EMCEE = {
    voice: 'Zarvox',
    rate: 180
  }

  MESSAGES = {
    positive: %w[Yes! Dude! Sweet! Nice! Pretty\ much\ the\ best! Yo\ Dawg!],
    negative: %w[No! Dang! Darn! Damn! Herp\ Derp!],
    indifferent: %w[Meh! Whateva!]
  }

  def start(example_count)
    super example_count
    say 'Here we go!', EMCEE[:voice], EMCEE[:rate]
  end

  def dump_summary(duration, example_count, failure_count, pending_count)
    super duration, example_count, failure_count, pending_count
    say "#{example_count} examples were run in #{duration} seconds.  #{failure_count} failed and #{pending_count} were pending.", EMCEE[:voice], EMCEE[:rate]
  end

  def example_passed(example)
    super example
    say MESSAGES[:positive].sample
  end

  def example_failed(example)
    super example
    say MESSAGES[:negative].sample
  end

  def example_pending(example)
    super example
    say MESSAGES[:indifferent].sample
  end

  private

  def say(message, voice=VOICES.sample, rate=Random.new.rand(150..500))
    system("say #{message} -v #{voice} -r #{rate}") if can_speak?
  end

  def can_speak?
    @can_speak ||= system('which say > /dev/null')
  end
end