# File test/test_spider.rb, line 136
  def test_transparency
    g = Gruff::Spider.new(20)
    g.title = "Transparent background"
    g.hide_text = true
    g.transparent_background = true
    g.hide_axes = true
    @datasets.each do |data|
      g.data(data[0], data[1])
    end
    g.write("test/output/spider_no_background.png")
  end