def assert_not_contain(content)
      hc = HasContent.new(content)
      assert !hc.matches?(current_dom), hc.negative_failure_message
    end
def assert_not_contain(content)
      hc = HasContent.new(content)
      assert !hc.matches?(current_dom), hc.negative_failure_message
    end
Asserts that the body of the response
 does not contain the supplied string or regepx