storybook/docs/snippets/vue/single-story-test.3.js.mdx

```js
// tests/Form.test.js

import { fireEvent, render, screen } from '@testing-library/vue';

import { composeStory } from '@storybook/vue3';

import Meta, { ValidForm as ValidFormStory } from './LoginForm.stories';

const FormOK = composeStory(ValidFormStory, Meta);

test('Validates form', () => {
  render(FormOK());

  const buttonElement = screen.getByRole('button', {
    name: 'Submit',
  });

  fireEvent.click(buttonElement);

  const isFormValid = screen.getByLabelText('invalid-form');
  expect(isFormValid).not.toBeInTheDocument();
});
```