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MIRROR: javascript for 🐜's, a tiny runtime with big ambitions ant.themackabu.dev
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12345678910111213141516const assert = require('node:assert');for (const text of ['', 'ascii', 'ééa', '中aé', 'a\0b', '😀', 'x😀é𝄞', '\ud800x\udfff', 'e\u0301']) { const expected = []; for (let i = 0; i < text.length; i++) expected.push(text.charAt(i)); for (const limit of [0, 1, 2, 3, 20, 0xffffffff]) { assert.deepStrictEqual(text.split('', limit), expected.slice(0, limit)); assert.deepStrictEqual(text.split({ toString() { return ''; } }, limit), expected.slice(0, limit)); } assert.deepStrictEqual(text.split(''), expected);}const long = 'é😀中'.repeat(10000);const parts = long.split('');assert.strictEqual(parts.length, long.length);for (let i = 0; i < parts.length; i++) assert.strictEqual(parts[i].charCodeAt(0), long.charCodeAt(i));console.log('PASS empty-separator split returns UTF-16 code units');