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Local Synthetics Environment

Pre-Reqs

  • Nodejs >= 16.10.0
  • NPM
  • Chrome 100+
  • Your favorite IDE

Installation

  1. Create a directory and run npm init to generate a package.json
  2. Install selenium-webdriver and any additional node modules support via Synthetics mentioned here
npm install --save [email protected]
  1. Install chromedriver either via Homebrew or direct download
  2. Start writing scripts!

Local Script Development

Scripted Browser

  • Import the following config into any js file:
/** Local Dev Config **/
const $selenium = require('selenium-webdriver');
let $webDriver = new $selenium.Builder().forBrowser('chrome').build();
/** Local Dev Config **/

This will allow for the same functions/syntax to be used compared to the New Relic Synthetics runtime.

Scripted API

Most of the time you will want to import additional modules, such as got, which replaces the deprecated request module to make http/API requests. In some cases, this requires importing the module instead of requiring it. For example:

import got from 'got';

instead of:

var got = require('got');

The import syntax also requires adding "type": "module" to your package.json.

New Relic allows the require syntax, but locally, you usually have to import. Once local dev is completed, typically import will be removed and require will be used on the New Relic runtime.

Troubleshooting

  • "chromedriver" cannot be opened because the developer cannot be verified - this can be fixed by trusting the chromedriver binary, by running the command:
xattr -d com.apple.quarantine /usr/local/bin/chromedriver