USING: tools.test ; IN: rosetta-code.balanced-brackets { t } [ "" balanced? ] unit-test { t } [ "[]" balanced? ] unit-test { t } [ "[][]" balanced? ] unit-test { t } [ "[[][]]" balanced? ] unit-test { f } [ "][" balanced? ] unit-test { f } [ "][][" balanced? ] unit-test { f } [ "[]][[]" balanced? ] unit-test { t } [ "abc[]def" balanced? ] unit-test { f } [ "abc][def" balanced? ] unit-test