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

import { within, userEvent } from '@storybook/testing-library';
import Page from './Page.svelte';

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

const Template = (args) => ({
  Component: Page,
  props: args,
});

export const LoggedOut = Template.bind({});
LoggedOut.args = {};

// More on interaction testing: https://storybook.js.org/docs/svelte/writing-tests/interaction-testing
export const LoggedIn = Template.bind({});
LoggedIn.play = async ({ canvasElement }) => {
  const canvas = within(canvasElement);
  const loginButton = await canvas.getByRole('button', { name: /Log in/i });
  await userEvent.click(loginButton);
};