module RSpec::Mocks::VerifyingDouble

def __send__(name, *args, &block)
  @__sending_message = name
  super
ensure
  @__sending_message = nil
end

def initialize(*args)
  super
  @__sending_message = nil
end

def method_missing(message, *args, &block)
  # Null object conditional is an optimization. If not a null object,
  # validity of method expectations will have been checked at definition
  # time.
  if null_object?
    if @__sending_message == message
      __mock_proxy.ensure_implemented(message)
    else
      __mock_proxy.ensure_publicly_implemented(message, self)
    end
  end
  super
end

def respond_to?(message, include_private=false)
  return super unless null_object?
  method_ref = __mock_proxy.method_reference[message]
  return case method_ref.visibility
    when :public    then true
    when :private   then include_private
    when :protected then include_private || RUBY_VERSION.to_f < 2.0
    else !method_ref.unimplemented?
  end
end

def send(name, *args, &block)
  __send__(name, *args, &block)
end