Skip to content

How to Setup Jest for LWC Testing

Jump to bottom
Coding With The Force edited this page Oct 6, 2020 · 20 revisions

Install/Setup guide for Jest:

  1. Download nodejs here: Node JS Install or use chocolately and nodist if you know what you're doing (this approach is a bit better imo): NodeJS Nodist Install Instructions

  2. Install Yarn

  3. Install sfdx-lwc-jest via the CLI using the command: yarn add -D @salesforce/sfdx-lwc-jest

  4. You may need to change your execution policy since jest doesn't register as a known Windows Package currently. Open powershell as an admin and enter the following command: Set-ExecutionPolicy Unrestricted a) When prompted, type the value A and then hit enter

  5. Create a folder inside your lightning web component (or Aura Component) folder called __tests__

  6. Create tests in that folder and name them [fileYouAreTesting].test.js

  7. Use the cli command npm run test:unit:watch to have jest automatically run tests when they get updated

Clone this wiki locally