# File lib/test/unit/testcase.rb, line 381
        def sub_test_case(name, &block)
          parent_test_case = self
          sub_test_case = Class.new(self) do
            singleton_class = class << self; self; end
            singleton_class.__send__(:define_method, :name) do
              [parent_test_case.name, name].compact.join("::")
            end
          end
          sub_test_case.class_eval(&block)
          sub_test_case
        end