@solidjs/testing-library

Simple and complete Solid DOM testing utilities that encourage good testing practices.

Inspired completely by preact-testing-library

Table of Contents

• The Problem
• The Solution
• Installation
• Docs
• Issues
• Acknowledgement

The Problem

You want to write tests for your Solid components so that they avoid including implementation details, and are maintainable in the long run.

The Solution

The Solid Testing Library is a very lightweight solution for testing Solid components. Its primary guiding principle is:

The more your tests resemble the way your software is used, the more confidence they can give you.

Installation

This module is distributed via npm which is bundled with node and should be installed as one of your project's devDependencies:

npm install --save-dev @solidjs/testing-library

If you using Jest we recommend using solid-jest to properly resolve the browser version of Solid as Jest will default to the server version when run in Node.

💡 If you are using Jest or vitest, you may also be interested in installing @testing-library/jest-dom so you can use the custom jest matchers.

Integration with Vite

A working Vite template setup with solid-testing-library and TypeScript support can be found here.

Docs

See the docs over at the Testing Library website.

There are several key differences, though:

⚠️ The render function takes in a function that returns a Solid Component, rather than simply the component itself.

// With @testing-library/preact
const results = render(<YourComponent />, options);

// With solid-testing-library
const results = render(() => <YourComponent />, options);

⚠️ Solid.js does not rerender, it merely executes side effects triggered by reactive state that change the DOM, therefore there is no rerender method. You can use global signals to manipulate your test component in a way that causes it to update.

Solid.js' reactive changes are pretty instantaneous, so there is rarely need to use waitFor(…) or await findByRole(…) - with the exception of transitions and Suspense.

⚠️ Solid.js external reactive state does not require any DOM elements to run in, so our renderHook call has no container, baseElement or queries in its options or return value. Instead, it has an owner to be used with runWithOwner if required. It also exposes a cleanup function, though this is already automatically called after the test is finished.

Issues

If you find any issues, please check on the issues page if they are already known. If not, opening an issue will be much appreciated, even more so if it contains a

• short description
• minimal reproduction code
• list of possible workarounds, if there are any

If you think you can fix an issue yourself, feel free to open a pull-request. If functionality changes, please don't forget to add or adapt tests.

Acknowledgment

Thanks goes to Kent C. Dodds and his colleagues for creating testing-library and to the creators of preact-testing-library.

This library has been created by Ryan Carniato and is currently maintained by Alex Lohr.