Insert cucumber step names into rails' test.log

env.rb

class RailsLogInterpolator
  def before_step(step)
    @current_step = step
    Rails.logger.info("{{{ #{step.name}")
  end
  def before_step_result(keyword, step_match, multiline_arg, status, exception, source_indent, background)
    Rails.logger.info("  #{@current_step.name} }}}\n")
  end
end

class Cucumber::Cli::Configuration
  def formatters_with_log_interpolator(step_mother)
    formatters_without_log_interpolator(step_mother) << RailsLogInterpolator.new
  end
  alias_method_chain :formatters, :log_interpolator
end