What do you understand by end-to-end front-end testing?

End-to-end (E2E) front-end testing is an automated test that checks the entire application from the user's perspective. It simulates real usage scenarios by interacting with the interface through a browser and verifies that all components and integrations work together correctly.

Unlike unit or integration tests, E2E tests cover the full flow: from loading the page, entering data, clicking buttons, to receiving the expected result.

Example: a test that opens the registration page, fills out the form, submits it, and checks that the user is successfully registered and sees a welcome message.

To write such tests, tools like Cypress, Selenium, Playwright are often used, which allow controlling the browser and checking the state of elements on the page.