my_class.rb

class MyClass
  include Scientist

  def count
    science('new_count') do |experiment|
      experiment.context(user: user)
      experiment.use { 1 }
      
      # One Try
      experiment.try { 2 }
      
      # Multiple Tries
      experiment.try('two') { 2 }
      experiment.try('three') { 3 }
      
      # Ignore, still runs all the tries
      experiment.ignore { true }
      
      # Similar to enabled?, does not run tries
      experiment.run_if { Flipper['new_count'.to_sym].enabled?(user) }
    end
  end
end

my_experiment.rb

require 'scientist'

class MyExperiment
  include Scientist::Experiment

  attr_reader :name

  def initialize(name:)
    @name = name
  end

  def enabled?
    Flipper[name.to_sym].enabled?(user)
  end

  def publish(result)
    Chime::Dog.histogram("#{name}.control.duration", result.control.duration)

    result.candidates.each do |candidate|
      Chime::Dog.histogram("#{name}.#{candidate.name}.duration", candidate.duration)
    end

    if result.matched?
      Chime::Dog.increment "#{name}.matched"
    elsif result.ignored?
      Chime::Dog.increment "#{name}.ignored"
    else
      Chime::Dog.increment "#{name}.mismatched"
    end
  end

  private

  def user
    context[:user]
  end
end