class Capybara::RSpecMatchers::NegatedMatcher

def description
  "not #{@matcher.description}"
end

def does_not_match?(actual)
  @matcher.matches?(actual)
end

def failure_message
  @matcher.failure_message_when_negated
end

def failure_message_when_negated
  @matcher.failure_message
end

def initialize(matcher)
  super()
  @matcher = matcher
end

def matches?(actual)
  @matcher.does_not_match?(actual)
end