Test that a string of text is (not) linked in Webrat or Capybara

CopyThen I should see a link labeled "Foo"
But I should not see a link labeled "Bar"

CopyThen /^I should( not)? see a link labeled "([^"]*)"$/ do |negate, label|
  expectation = negate ? :should_not : :should
  response.send(expectation, have_selector("a", :content => label))
end

CopyThen /^I should( not)? see a link labeled "([^"]*)"$/ do |negate, label|
  expectation = negate ? :should_not : :should
  page.send(expectation, have_css('a', :text => label))
end