Question

I’m adding unit tests to a large batch of code and am looking for a way to insert fake methods in for testing purposes. The problem is that, as far as I know in Ruby, to pass a method in one must use ClassName.method(:method_name), and then refactor the method I’m testing to use boo.call() instead of just boo(). Is there an easier way to do this than refactoring everything to use .method and .call?

Answer 1

Why not just pass lambdas? I mean, lambda is just an anonymous method/function as you know it from other languages, so it should work fine. Eg:

fake_method = lambda { |n| "do something with n" }

def other_method(fm)
  #...
  fm.call
  #...
end

other_method(fake_method)

You still need to call .call though