stub_object

# File activesupport/lib/active_support/testing/time_helpers.rb, line 16
      def stub_object(object, method_name, &block)
        if stub = stubbing(object, method_name)
          unstub_object(stub)
        end

        new_name = "__simple_stub__#{method_name}"

        @stubs[object.object_id][method_name] = Stub.new(object, method_name, new_name)

        object.singleton_class.alias_method new_name, method_name
        object.define_singleton_method(method_name, &block)
      end