# File lib/dm-core/spec/lib/adapter_helpers.rb, line 7
        def supported_by(*adapters, &block)
          adapters = adapters.map { |adapter| adapter.to_sym }
          adapter  = DataMapper::Spec.adapter_name.to_sym
          if adapters.include?(:all) || adapters.include?(adapter)
            describe_adapter(:default, &block)
          end
        end