nodejs/test/parallel/test-buffer-parent-property.js

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'use strict';
// Fix for https://github.com/nodejs/node/issues/8266
//
// Zero length Buffer objects should expose the `buffer` property of the
// TypedArrays, via the `parent` property.
require('../common');
const assert = require('assert');
// If the length of the buffer object is zero
assert((new Buffer(0)).parent instanceof ArrayBuffer);
// If the length of the buffer object is equal to the underlying ArrayBuffer
assert((new Buffer(Buffer.poolSize)).parent instanceof ArrayBuffer);
// Same as the previous test, but with user created buffer
const arrayBuffer = new ArrayBuffer(0);
assert.strictEqual(new Buffer(arrayBuffer).parent, arrayBuffer);
assert.strictEqual(new Buffer(arrayBuffer).buffer, arrayBuffer);
assert.strictEqual(Buffer.from(arrayBuffer).parent, arrayBuffer);
assert.strictEqual(Buffer.from(arrayBuffer).buffer, arrayBuffer);