module RSpec::Mocks::ArgumentMatchers

object.message(1, 2, 3, 4)
object.message(1, 2, 3)
object.message(1, 2)
# matches any of these:

expect(object).to receive(:message).with(1, 2, any_args)
@example

Acts like an arg splat, matching any number of args at any point in an arg list.

def any_args
  AnyArgsMatcher::INSTANCE
end