Fausto Silva's "errou" formatter

errou_formatter.rb

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

  def initialize(*args)
    super(*args)
    @index = 0
  end

  def increase_index!
    @index += 1
  end

  def error_word
    "ERROU"
  end

  def error_char
    error_word[current_error_word_index]
  end

  def current_error_word_index
    max_index = error_word.length - 1
    adjusted_index = [max_index, @index].min
  end

  def example_passed(_notification)
    output_print('.', :success)
  end

  def example_pending(_notification)
    output_print('*', :pending)
  end


  def example_failed(_notification)
    letter = error_char
    output_print(letter, :failure)
    increase_index!
  end

  def output_print(character, console_code)
    output.print RSpec::Core::Formatters::ConsoleCodes.wrap(character, console_code)
  end
end

usage:

rspec --require ./errou_formatter.rb --format CustomFormatter

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