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nodejs/test/parallel/test-buffer-zero-fill-cli.js
Rich Trott 330f25ef82 test: prepare for consistent comma-dangle lint rule
Make changes so that tests will pass when the comma-dangle settings
applied to the rest of the code base are also applied to tests.

PR-URL: https://github.com/nodejs/node/pull/37930
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Derek Lewis <DerekNonGeneric@inf.is>
2021-04-01 23:14:29 -07:00

33 lines
769 B
JavaScript

'use strict';
// Flags: --zero-fill-buffers
// when using --zero-fill-buffers, every Buffer and SlowBuffer
// instance must be zero filled upon creation
require('../common');
const SlowBuffer = require('buffer').SlowBuffer;
const assert = require('assert');
function isZeroFilled(buf) {
for (const n of buf)
if (n > 0) return false;
return true;
}
// This can be somewhat unreliable because the
// allocated memory might just already happen to
// contain all zeroes. The test is run multiple
// times to improve the reliability.
for (let i = 0; i < 50; i++) {
const bufs = [
Buffer.alloc(20),
Buffer.allocUnsafe(20),
SlowBuffer(20),
Buffer(20),
new SlowBuffer(20),
];
for (const buf of bufs) {
assert(isZeroFilled(buf));
}
}