The very useful andand gem Show archive.org snapshot does not play very nice with Ruby's SimpleDelegator (or vice versa).

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This following will not work:

class MyDecorator < SimpleDelegator
  def foo
  end
end

MyDecorator.new(Object.new).andand.foo

The reasons are a bit subtle, basically SimpleDelegator will "force" some methods to be delegated, so the andand method is called on the wrapped object, not the delegator.

You can fix it like this:

class Decorator < SimpleDelegator
  def andand(*)
    super
  end
end