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Add instructions on how to run the tests when using @woocommerce/components (#38821) 

* Add instructions on how to run the tests when using @woocommerce/components

* Add changelog
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Chi-Hsuan Huang 2023-06-26 17:05:49 +08:00 committed by GitHub
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packages/js/components/README.md
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@ -21,14 +21,46 @@ View [the full Component documentation](https://woocommerce.github.io/woocommerc
import { Card } from '@woocommerce/components';
export default function MyCard() {
return (
<Card title="Store Performance" description="Key performance metrics">
<p>Your stuff in a Card.</p>
</Card>
);
return (
<Card title="Store Performance" description="Key performance metrics">
<p>Your stuff in a Card.</p>
</Card>
);
}
```
Many components include CSS to add style, you will need to add in order to appear correctly. Within WooCommerce, add the `wc-components` stylesheet as a dependency of your plugin's stylesheet. See [wp_enqueue_style documentation](https://developer.wordpress.org/reference/functions/wp_enqueue_style/#parameters) for how to specify dependencies.
In non-WordPress projects, link to the `build-style/card/style.css` file directly, it is located at `node_modules/@woocommerce/components/build-style/<component_name>/style.css`.
## Usage with tests
If you are using these components in a project that uses Jest for testing, you may get an error that looks like this:
```bash
Cannot find module '@woocommerce/settings' from 'node_modules/@woocommerce/experimental/node_modules/@woocommerce/navigation/build/index.js'
```
To fix this, you will need to mock the `@woocommerce/settings` because it's an alias that points to the `window.wcSettings`, which in turn comes from and is maintained by the [WC Blocks](https://github.com/woocommerce/woocommerce-blocks) package, the front-end code for this is located [here](https://href.li/?https://github.com/woocommerce/woocommerce-gutenberg-products-block/tree/trunk/assets/js/settings/shared).
This can be done by adding the following to your Jest config:
```js
module.exports = {
moduleNameMapper: {
'@woocommerce/settings': path.resolve(
__dirname,
'./mock/woocommerce-settings'
),
}
setupFiles: [
path.resolve( __dirname, 'build/setup-globals.js' ),
],
// ...other config
}
```
Then, you will need to create the following files:
1. Create a new file called woocommerce-settings.js in the ./mock directory. You can find the content for this file [here](https://github.com/woocommerce/woocommerce/blob/trunk/packages/js/internal-js-tests/src/mocks/woocommerce-settings.js#L1).
2. Next, create a file named setup-globals.js. You can find the content for this file [here](https://github.com/woocommerce/woocommerce/blob/trunk/packages/js/internal-js-tests/src/setup-globals.js#L44). The purpose of this file is to mock the wcSettings global variable.

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packages/js/components/changelog/dev-wc-components-readme Normal file
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@ -0,0 +1,4 @@
Significance: patch
Type: dev
Add instructions on how to run the tests when using @woocommerce/components