gistfile1.rb

# spec/support/matchers/be_hidden.rb

module Spec::Matchers
  class BeHidden
    def initialize(scope)
      @scope = scope
    end

    def matches?(actual)
      @actual = actual
      # match only on root element, a little stricter but I think also prevents evil
      @scope.have_tag('*:root[style *= ?]', /display\s*:\s*none/).matches?(actual)
    end
    
    def failure_message_for_should
      "expected root element of '#{@actual}' to be hidden, but I saw it"
    end
    
    def failure_message_for_should_not
      "expected root element of '#{@actual}' be visible, but it was, in fact, hidden"
    end

    def description
      "be hidden via xhtml"
    end
  end
  def be_hidden
    BeHidden.new(self)
  end
end