Minitest - ensure assertion does not raise if transition is invalid (return false instead) - #626

class Cleaner
  include AASM

  aasm do
    state :idle, initial: true
    state :cleaning

    event :clean do
      transitions from: :idle, to: :cleaning, guard: :cleaning_needed?
    end
  end

  def cleaning_needed?
    false
  end
end

cleaner = Cleaner.new
refute_transitions_from cleaner, :idle, to: :cleaning, on_event: :clean