Examples for my post at http://griffin.oobleyboo.com/archive/our-3-laws-of-cucumber/

aurora_matcher_steps.rb

# This was ripped from one of our Webrat suites - Capybara would be similar, but slightly different...
Then /^I should( not)? see "([^\"]*)" in (.+)$/ do |negatory, text, area|
	within(selector_for(area)) do |content|
		if negatory.blank? then
			content.should contain(text)
		else
			content.should_not contain(text)
		end
	end
end

authentication.feature

When I am on the login page
And I fill in "Username" with "joe"
And I fill in "Password" with "password"
And I press "Log In"
Then I should be on the dashboard
And I should see "Welcome back, Joe!" in the notification area

other_feature.feature

Given I am logged in as joe

paths.rb

# When I am on the Dashboard
# And I follow "Little Johnny"
# Then I should be on the Student page for "Little Johnny"

# In paths.rb :
when /the Student page for "([^"]+)"/i
  user=User.find_by_name($1)
  "/classes/#{user.school_classes.first.id}/students/#{user.id}"

selector_matcher.feature

Then I should see "Welcome Back, Jason!" in the notification area

selectors.rb

# Put this in features/support/selectors.rb
module AreaHelpers
  # Maps a name to a selector.
  def selector_for(area_name)
    case area_name
			when /^"(.*)"$/
				$1
			when /the notification area/
				'#notice'
			when /the error message/
				'#error'
			when /the menu/
				'#menu'
			when /the sidebar/
				'#sidebar'
			when /the requests table/
				'table#requests'
			when /the history/
				'.history'
    
    # Add more mappings here.
    else
      raise "Can't find mapping from \"#{area_name}\" to a selector.\n" +
        "Now, go and add a mapping in #{__FILE__}"
    end
  end
end

World(AreaHelpers)