Passed: 🎄, Pending: 🎀, Failed: 🎁

christmas_formatter.rb

# bundle exec rspec --require ./christmas_formatter.rb --format ChristmasFormatter

require "rspec/core/formatters/base_text_formatter"
require "rspec/core/formatters/console_codes"

class ChristmasFormatter < RSpec::Core::Formatters::BaseTextFormatter
  RSpec::Core::Formatters.register self, :example_passed, :example_pending, :example_failed, :start_dump

  FAIL_EMOJI = "\u{1f381}"
  PASS_EMOJI = "\u{1f384}"
  PENDING_EMOJI = "\u{1f380}"

  def example_passed(*)
    output.print  RSpec::Core::Formatters::ConsoleCodes.wrap(PASS_EMOJI, :passed)
  end

  def example_pending(*)
    output.print RSpec::Core::Formatters::ConsoleCodes.wrap(PENDING_EMOJI, :pending)
  end

  def example_failed(*)
    output.print RSpec::Core::Formatters::ConsoleCodes.wrap(FAIL_EMOJI, :failure)
  end

  def start_dump(*)
    output.puts
  end
end