# @rockpack/tester
**@rockpack/tester** is a pre-configured Jest setup with TypeScript and Babel support, HTML reporting, and best-practice defaults for React projects.
This module is part of the **Rockpack** project. See more details on [the official site](https://alexsergey.github.io/rockpack/).
## Included
- Full TypeScript and Babel support via `@rockpack/babel`
- [jest-html-reporters](https://github.com/Hazyzh/jest-html-reporters) - HTML test report generation
- jsdom environment for React component testing
- CSS module mocking via identity-object-proxy
## Using
1. Installation:
```sh
# NPM
npm install @rockpack/tester --save-dev
# YARN
yarn add @rockpack/tester --dev
```
2. Create **tests.js** in the root of the project:
```js
const tests = require('@rockpack/tester');
tests();
```
3. Run tests:
```shell
node tests.js
```
or in watch mode:
```shell
node tests.js --watch
```
4. Create `something.spec.js` (or `.spec.ts`) in the `src` folder and write your Jest tests.
**See the `examples` folder** - here
## Configuration
To override Jest configuration - for example, to switch the test environment from jsdom to Node:
1. Create `jest.extend.js` in the root of the project:
```js
module.exports = {
testEnvironment: 'node',
};
```
## The MIT License
MIT