#testEnvironment

• Type: 'node' | 'jsdom' | 'happy-dom'
• Default: 'node'
• CLI: --testEnvironment=node

The environment that will be used for testing.

The default environment in Rstest is a Node.js environment. If you are building a web application, you can use a browser-like environment through jsdom or happy-dom instead.

import { defineConfig } from '@rstest/core';

export default defineConfig({
  testEnvironment: 'jsdom',
});

#Dom testing

Rstest supports jsdom and happy-dom for mocking DOM and browser APIs.

If you want to enable DOM testing, you can use the following configuration:

import { defineConfig } from '@rstest/core';

export default defineConfig({
  testEnvironment: 'jsdom', // or 'happy-dom'
});

You also need to install the corresponding package:

For jsdom

npm add jsdom -D

For happy-dom

npm add happy-dom -D

After enabling DOM testing, you can write tests that use browser APIs like document and window.

test('DOM test', () => {
  document.body.innerHTML = '<p class="content">hello world</p>';
  const paragraph = document.querySelector('.content');
  expect(paragraph?.innerHTML).toBe('hello world');
});