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- 'use strict';
-
- module.exports = function () {
- var set, iterator, result;
- if (typeof Set !== 'function') return false;
- set = new Set(['raz', 'dwa', 'trzy']);
- if (String(set) !== '[object Set]') return false;
- if (set.size !== 3) return false;
- if (typeof set.add !== 'function') return false;
- if (typeof set.clear !== 'function') return false;
- if (typeof set.delete !== 'function') return false;
- if (typeof set.entries !== 'function') return false;
- if (typeof set.forEach !== 'function') return false;
- if (typeof set.has !== 'function') return false;
- if (typeof set.keys !== 'function') return false;
- if (typeof set.values !== 'function') return false;
-
- iterator = set.values();
- result = iterator.next();
- if (result.done !== false) return false;
- if (result.value !== 'raz') return false;
-
- return true;
- };
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