module Selenium::WebDriver::SearchContext

def extract_args(args)
  case args.size
  when 2
    args
  when 1
    arg = args.first
    unless arg.respond_to?(:shift)
      raise ArgumentError, "expected #{arg.inspect}:#{arg.class} to respond to #shift"
    end
    # this will be a single-entry hash, so use #shift over #first or #[]
    arr = arg.dup.shift
    unless arr.size == 2
      raise ArgumentError, "expected #{arr.inspect} to have 2 elements"
    end
    arr
  else
    raise ArgumentError, "wrong number of arguments (#{args.size} for 2)"
  end
end