```js
// Button.test.js

import Button from './Button.svelte';

import { render } from '@testing-library/svelte';

import { Primary } from './Button.stories'; //👈  Our story imported here

test('renders the button in the primary state', () => {
  //👇 Story's args used with our test
  const { container } = render(Button, {
    props: Primary.args,
  });
  expect(container.firstChild.children[0].classList.contains('storybook-button--primary')).toBe(true);
});
```