class Navigate
  attr_reader :browser
  def initialize(browser)
    @browser = browser
  end
  def go(nav_path=[])
    raise ArgumentError if nav_path.class != Array || nav_path.nitems < 1 
    nav_path.each { |item|
      case item[:type]
        when 'link'
          exec = "@browser.link(#{item[:how]}, #{item[:what]}).#{item[:action]}"
          eval exec
        when 'text_field'
          if item.has_key?(:value)
            # escape ' in item[:value] as it's used for quoted string in the set
            #item[:value].gsub(/'/, /\'/)
            exec = "@browser.text_field(#{item[:how]}, #{item[:what]}).#{item[:action]}('#{item[:value]}')"
            eval exec
          end
        when 'check_box'
          # escape ' in item[:value] as it's used for quoted string in the set
          #item[:value].gsub(/'/, /\'/)
          exec = "@browser.checkbox(#{item[:how]}, #{item[:what]}).#{item[:action]}"
          eval exec
        when 'submit'
            exec = "@browser.button(#{item[:how]}, #{item[:what]}).#{item[:action]}"
            eval exec
         
      end
    }  
  end
end