storybook/code/renderers/svelte/template/cli/js/Page.stories.js

import { within, userEvent, expect } from '@storybook/test';

import Page from './Page.svelte';

export default {
  title: 'Example/Page',
  component: Page,
  parameters: {
    // More on how to position stories at: https://storybook.js.org/docs/svelte/configure/story-layout
    layout: 'fullscreen',
  },
};

export const LoggedOut = {};

// More on interaction testing: https://storybook.js.org/docs/svelte/writing-tests/interaction-testing
export const LoggedIn = {
  play: async ({ canvasElement }) => {
    const canvas = within(canvasElement);
    const loginButton = canvas.getByRole('button', {
      name: /Log in/i,
    });
    await expect(loginButton).toBeInTheDocument();
    await userEvent.click(loginButton);
    await expect(loginButton).not.toBeInTheDocument();

    const logoutButton = canvas.getByRole('button', {
      name: /Log out/i,
    });
    await expect(logoutButton).toBeInTheDocument();
  },
};