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The utils module contains number of small utility functions useful in every day load testing.

⭐️ Source code available on GitHub. Please request features and report bugs through GitHub issues.

randomIntBetween(min, max)Random integer in a given range
randomItem(array)Random item from a given array
randomString(length)Random string of a given length
uuidv4()Random UUID v4 in a string representation
findBetween(content, left, right)Extract a string between two surrounding strings

Simple example

import { sleep } from 'k6';
import http from 'k6/http';
import {
} from '';
export default function () {
const res =``, {
first_name: randomItem(['Joe', 'Jane']), // random name
last_name: 'Smith',
username: `user_${randomString(10)}`, // random email address,
password: uuidv4(), // random password in form of uuid
// find a string between two strings to grab the username:
const username = findBetween(res.body, '"username":"', '"');
console.log('username from response: ' + username);
sleep(randomIntBetween(1, 5)); // sleep between 1 and 5 seconds.