./script/generate gruff SimulationGraph -c

app/controllers/simulation_graph_controller.rb

+class SimulationGraphController < ApplicationController
+
+  # To make caching easier, add a line like this to config/routes.rb:
+  # map.graph "graph/:action/:id/image.png", :controller => "graph"
+  #
+  # Then reference it with the named route:
+  #   image_tag graph_url(:action => 'show', :id => 42)
+
+  def show
+    g = Gruff::Line.new
+    # Uncomment to use your own theme or font
+    # See http://colourlovers.com or http://www.firewheeldesign.com/widgets/ for color ideas
+#     g.theme = {
+#       :colors => ['#663366', '#cccc99', '#cc6633', '#cc9966', '#99cc99'],
+#       :marker_color => 'white',
+#       :background_colors => ['black', '#333333']
+#     }
+#     g.font = File.expand_path('artwork/fonts/VeraBd.ttf', RAILS_ROOT)
+
+    g.title = "Gruff-o-Rama"
+    
+    g.data("Apples", [1, 2, 3, 4, 4, 3])
+    g.data("Oranges", [4, 8, 7, 9, 8, 9])
+    g.data("Watermelon", [2, 3, 1, 5, 6, 8])
+    g.data("Peaches", [9, 9, 10, 8, 7, 9])
+
+    g.labels = {0 => '2004', 2 => '2005', 4 => '2006'}
+
+    send_data(g.to_blob, :disposition => 'inline', :type => 'image/png', :filename => "gruff.png")
+  end
+
+end

test/functional/simulation_graph_controller_test.rb

+require File.dirname(__FILE__) + '/../test_helper'
+require 'simulation_graph_controller'
+
+# Re-raise errors caught by the controller.
+class SimulationGraphController; def rescue_action(e) raise e end; end
+
+class SimulationGraphControllerTest < Test::Unit::TestCase
+
+  #fixtures :data
+
+  def setup
+    @controller = SimulationGraphController.new
+    @request    = ActionController::TestRequest.new
+    @response   = ActionController::TestResponse.new
+  end
+
+  # TODO Replace this with your actual tests
+  def test_show
+    get :show
+    assert_response :success
+    assert_equal 'image/png', @response.headers['Content-Type']
+  end
+  
+end