def setUp(self):
     reg = registry_tests.small_testing_registry()
     scheme = Scheme()
     zero = scheme.new_node(reg.widget("zero"))
     one = scheme.new_node(reg.widget("one"))
     add = scheme.new_node(reg.widget("add"))
     scheme.new_link(zero, "value", add, "left")
     scheme.new_link(one, "value", add, "right")
     self.scheme = scheme
 def setUp(self):
     reg = registry_tests.small_testing_registry()
     scheme = Scheme()
     zero = scheme.new_node(reg.widget("zero"))
     one = scheme.new_node(reg.widget("one"))
     add = scheme.new_node(reg.widget("add"))
     scheme.new_link(zero, "value", add, "left")
     scheme.new_link(one, "value", add, "right")
     self.scheme = scheme