class RSpec::Mocks::ArgumentExpectation

def args_match?(*args)
  match_any_args? || matchers_block_matches?(*args) || matchers_match?(*args)
end

def initialize(*args, &block)
  @args = args
  @matchers_block = args.empty? ? block : nil
  @match_any_args = false
  @matchers = nil
  
  case args.first
  when ArgumentMatchers::AnyArgsMatcher
    @match_any_args = true
  when ArgumentMatchers::NoArgsMatcher
    @matchers = []
  else
    @matchers = args.collect {|arg| matcher_for(arg)}
  end
end

def is_matcher?(obj)
  !is_stub_as_null_object?(obj) & obj.respond_to?(:matches?) & obj.respond_to?(:description)
end

def is_stub_as_null_object?(obj)
  obj.respond_to?(:__rspec_double_acting_as_null_object?) && obj.__rspec_double_acting_as_null_object?
end

def match_any_args?
  @match_any_args
end

def matcher_for(arg)
  return ArgumentMatchers::MatcherMatcher.new(arg) if is_matcher?(arg)
  return ArgumentMatchers::RegexpMatcher.new(arg)  if arg.is_a?(Regexp)
  return ArgumentMatchers::EqualityProxy.new(arg)
end

def matchers_block_matches?(*args)
  @matchers_block ? @matchers_block.call(*args) : nil
end

def matchers_match?(*args)
  @matchers == args
end