Testing "seam" in Elixir

[Eiji]

@lessless

class PriceCalculatorStub < Price calculator
  def calculate_shipping(order)
     1000
  end
end

Of course OOP in Elixir would not work, but there are few things that looks similar and use metaprogramming to achieve similar results:

1. Kernel.defoverridable/1
2. oop package (old)