class RSpec::Matchers::BuiltIn::StartAndEndWith

def failure_message_for_should
  "expected #{@actual.inspect} to #{self.class.name.split('::').last.sub(/With/,'').downcase} with #{@expected.inspect}"
end

def failure_message_for_should_not
  "expected #{@actual.inspect} not to #{self.class.name.split('::').last.sub(/With/,'').downcase} with #{@expected.inspect}"
end

def initialize(*expected)
  @expected = expected.length == 1 ? expected.first : expected
end

def matches?(actual)
  @actual = actual.respond_to?(:[]) ? actual : (raise ArgumentError.new("#{actual.inspect} does not respond to :[]"))
  begin
    @expected.respond_to?(:length) ? subset_matches?(@expected, @actual) : element_matches?(@expected, @actual)
  rescue ArgumentError
    raise ArgumentError.new("#{actual.inspect} does not have ordered elements")
  end
end