node/test/parallel/test-buffer-inheritance.js
David Sánchez 945134361f test: refactoring test, reordering arguments
Refactors the test-buffer-inheritance.js test, switches the order of the
arguments to be: 'actual', 'expected'

PR-URL: https://github.com/nodejs/node/pull/28343
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2019-06-26 16:29:10 +08:00

40 lines
851 B
JavaScript

'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();
});