test/test_examples.rb in ruby-graphviz-1.2.3 vs test/test_examples.rb in ruby-graphviz-1.2.4

@@ -1,5 +1,7 @@
+require 'open3'
+
 class GraphVizTest < Test::Unit::TestCase
   # you can run a subset of all the samples like this:
   #  ruby test/test_examples.rb  --name='/sample3[6-9]/'
   #
   # The above will run samples 36, 37, 38, and 39
@@ -94,10 +96,10 @@
 
   if File.directory? OutputDir
     FileUtils.rm_rf OutputDir
   end
   FileUtils.cp_r ExampleDir, OutputDir
-  
+
   samples = Dir[File.join(OutputDir,'sample*.rb')].sort
   samples.each {|path| make_sample_test_method(path) }
 
 private