```ts
// MyForm.stories.ts

import { expect } from '@storybook/jest';

import { userEvent, waitFor, within } from '@storybook/testing-library';

// Replace your-framework with the name of your framework
import type { Meta } from '@storybook/your-framework';

import { MyForm } from './MyForm';

const meta: Meta<typeof MyForm> = {
  /* 👇 The title prop is optional.
   * See https://storybook.js.org/docs/7.0/react/configure/overview#configure-story-loading
   * to learn how to generate automatic titles
   */
  title: 'MyComponent',
  component: MyComponent,
  argTypes: {
    onSubmit: { action: true },
  },
};

export default meta;
type Story = StoryObj<typeof MyForm>;

/*
 * See https://storybook.js.org/docs/7.0/react/writing-stories/play-function#working-with-the-canvas
 * to learn more about using the canvasElement to query the DOM
 */
export const Submitted: Story = {
  play: async ({ args, canvasElement, step }) => {
    const canvas = within(canvasElement);

    await step('Enter credentials', async () => {
      await userEvent.type(canvas.getByTestId('email'), 'hi@example.com');
      await userEvent.type(canvas.getByTestId('password'), 'supersecret');
    });

    await step('Submit form', async () => {
      await userEvent.click(canvas.getByRole('button'));
    });

    await waitFor(() => expect(args.onSubmit).toHaveBeenCalled());
  },
};
```