Simple Cucumber test steps for using Delorean for time travel

time_steps.rb

When /^(?:I )?travel (?:forward|backward) in time to (\d+) (years?|months?|weeks?|days?) (from now|ago)$/ do |amount, unit, direction|
  Delorean.time_travel_to (amount.to_i).send(unit.to_sym).send(direction.gsub(/\s/, "_").to_sym)
end

Then /^(?:I )?travel in time to the present$/ do
  Delorean.back_to_the_present
end