.rspec

--color
--require spec_helper
--require ./spec/support/lifx
-f LIFXFormatter

lifx_formatter.rb

require 'open4'
class LIFXFormatter < RSpec::Core::Formatters::ProgressFormatter
  attr_accessor :lifx
  RSpec::Core::Formatters.register self, :example_failed, :dump_summary

  def initialize(stdout)
    super
    pid, stdin, stdout, stderr = Open4::popen4("lifx")
    @lifx = stdin
  end

  def example_passed(example)
    super
  end

  def example_failed(example)
    super
    lifx.puts "fade on Test 0s"
    lifx.puts "setcolor Test red brightness:10"
  end

  def dump_summary(summary)
    if summary.failed_examples.empty?
      lifx.puts "setcolor Test green brightness:10"
    end
    super
  end
end