enable unit tests again

Rakefile

@@ -1,8 +1,14 @@
 #!/usr/bin/env rake
 require "bundler/gem_tasks"
+require "rake/testtask"
 
 require './lib/rubigen'
 
+  Rake::TestTask.new do |t|
+    t.libs << "test"
+    t.test_files = FileList['test/test*.rb']
+    t.verbose = true
+  end
 
 
 namespace :cucumber do