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nodejs/test/parallel/test-process-hrtime.js
Joyee Cheung a647d82f83 process: improve process.hrtime
* Add benchmarks for diffing a previous result
* Improvements to the documentation, including type annotation
* Update the outdated comments in src/node.cc, improve comments
  in lib/internal/process.js
* Check the argument is an Array Tuple with length 2

PR-URL: https://github.com/nodejs/node/pull/10764
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Brian White <mscdex@mscdex.net>
2017-01-23 21:30:18 +08:00

37 lines
1.1 KiB
JavaScript

'use strict';
require('../common');
const assert = require('assert');
// the default behavior, return an Array "tuple" of numbers
const tuple = process.hrtime();
// validate the default behavior
validateTuple(tuple);
// validate that passing an existing tuple returns another valid tuple
validateTuple(process.hrtime(tuple));
// test that only an Array may be passed to process.hrtime()
assert.throws(() => {
process.hrtime(1);
}, /^TypeError: process.hrtime\(\) only accepts an Array tuple$/);
assert.throws(() => {
process.hrtime([]);
}, /^TypeError: process.hrtime\(\) only accepts an Array tuple$/);
assert.throws(() => {
process.hrtime([1]);
}, /^TypeError: process.hrtime\(\) only accepts an Array tuple$/);
assert.throws(() => {
process.hrtime([1, 2, 3]);
}, /^TypeError: process.hrtime\(\) only accepts an Array tuple$/);
function validateTuple(tuple) {
assert(Array.isArray(tuple));
assert.strictEqual(tuple.length, 2);
assert(Number.isInteger(tuple[0]));
assert(Number.isInteger(tuple[1]));
}
const diff = process.hrtime([0, 1e9 - 1]);
assert(diff[1] >= 0); // https://github.com/nodejs/node/issues/4751