https://github.com/preactjs/jest-preset-preact

Jest preset for testing Preact apps
https://github.com/preactjs/jest-preset-preact

jest preact preset testing

Last synced: about 1 month ago
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Jest preset for testing Preact apps

• Host: GitHub
• URL: https://github.com/preactjs/jest-preset-preact
• Owner: preactjs
• License: mit
• Created: 2020-06-15T18:50:51.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2024-02-07T16:51:11.000Z (9 months ago)
• Last Synced: 2024-04-14T13:08:33.906Z (7 months ago)
• Topics: jest, preact, preset, testing
• Language: JavaScript
• Size: 200 KB
• Stars: 20
• Watchers: 4
• Forks: 12
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# jest-preset-preact

Jest preset containing all required configuration for writing tests for [preact](https://github.com/preactjs/preact).

Features:

- Transpiles JSX to `h()`

- Aliases for `react` imports to point to `preact/compat`

- Automatically serialize Preact `VNodes` in snapshots

- Stub style imports (`.css`, `.less`, `.sass/scss`, etc)

- Add typeahead preview for filtering in jest's watch mode

## Usage

Install it via npm or yarn:

```bash

npm install --save-dev jest-preset-preact

# or via yarn

yarn add -D jest-preset-preact

```

...and add the preset to your `jest.config.js` file.

```js

// jest.config.js

module.exports = {

	preset: 'jest-preset-preact',

};

```

You can override the default Babel config by providing your own Babel config file:

```js

// babel.config.js

module.exports = {

  env: {

    test: {

      plugins: [

        [

          "@babel/plugin-transform-react-jsx",

          {

            runtime: "automatic",

            importSource: "preact"

          }

        ]

      ]

    }

  }

}

```

This, for example, would enable the runtime JSX transform instead of the classic.

## License

MIT, see [the LICENSE file](./LICENSE).