When you view that story or run that test in Storybook, you can see each step of the simulated behavior and the assertions made against the component. If anything goes wrong, you can step back-and-forth through the test to pinpoint exactly where the issue occurred.
To learn more about Storybook's mocking, accessibility testing, interactions debugging, and coverage tools, please see the [Storybook testing docs](https://storybook.js.org/docs/writing-tests?ref=svelte-docs&renderer=svelte).
## E2E tests using Playwright
E2E (short for 'end to end') tests allow you to test your full application through the eyes of the user. This section uses [Playwright](https://playwright.dev/) as an example, but you can also use other solutions like [Cypress](https://www.cypress.io/) or [NightwatchJS](https://nightwatchjs.org/).