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'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$/);
function validateTuple(tuple) {
assert(Array.isArray(tuple));
assert.strictEqual(tuple.length, 2);
tuple.forEach((v) => {
assert.strictEqual(typeof v, 'number');
assert.strictEqual(isFinite(v), true);
});
}
const diff = process.hrtime([0, 1e9 - 1]);
assert(diff[1] >= 0); // https://github.com/nodejs/node/issues/4751