What is end to end testing and how is it different from the unit tests Angular sets up by default?

End to end testing runs your actual app in a real browser and simulates a real user's actions, like clicking buttons and filling out forms, checking that entire flows work correctly from start to finish. Unit tests, which Angular sets up by default using Jasmine and Karma, instead check small, isolated pieces of code in complete isolation.

// A simplified Cypress end to end test
cy.visit('/login');
cy.get('input[name=email]').type('user@example.com');
cy.get('button[type=submit]').click();
cy.url().should('include', '/dashboard');