class RSpec::Mocks::VerifyingMessageExpectation

have the correct arity.
message being expected, so that it can verify that any expectations
A message expectation that knows about the real implementation of the

def ensure_arity!(actual) 

def ensure_arity!(actual)
  return if method_reference.nil?
  method_reference.when_defined do |method|
    calculator = ArityCalculator.new(method)
    unless calculator.within_range?(actual)
      # Fail fast is required, otherwise the message expecation will fail
      # as well ("expected method not called") and clobber this one.
      @failed_fast = true
      @error_generator.raise_arity_error(calculator, actual)
    end
  end
end

def initialize(*args) 

def initialize(*args)
  super
end

def with(*args, &block)

@override 
def with(*args, &block)
  unless ArgumentMatchers::AnyArgsMatcher === args.first
    expected_arity = if ArgumentMatchers::NoArgsMatcher === args.first
      0
    elsif args.length > 0
      args.length
    else
      # No arguments given, this will raise.
      super
    end
    ensure_arity!(expected_arity)
  end
  super
end