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'use strict'; require('../common'); const assert = require('assert'); function T(n) { const ui8 = new Uint8Array(n); Object.setPrototypeOf(ui8, T.prototype); return ui8; } Object.setPrototypeOf(T.prototype, Buffer.prototype); Object.setPrototypeOf(T, Buffer); T.prototype.sum = function sum() { let cntr = 0; for (let i = 0; i < this.length; i++) cntr += this[i]; return cntr; }; const vals = [new T(4), T(4)]; vals.forEach(function(t) { assert.strictEqual(t.constructor, T); assert.strictEqual(Object.getPrototypeOf(t), T.prototype); assert.strictEqual(Object.getPrototypeOf(Object.getPrototypeOf(t)), Buffer.prototype); t.fill(5); let cntr = 0; for (let i = 0; i < t.length; i++) cntr += t[i]; assert.strictEqual(cntr, t.length * 5); // Check this does not throw t.toString(); });