React Native supports testing at multiple levels — unit tests (logic), component tests (with React Native Testing Library), and end-to-end tests (with Detox). A good testing strategy improves reliability and confidence.
Unit and component testing (Jest + Testing Library)
JEST → the standard JS test runner (unit tests for logic, functions, hooks)
REACT NATIVE TESTING LIBRARY → test components by rendering and interacting with them
(the way a user would) — query elements, fire events, assert on output
{ render, fireEvent, screen } ;
(, {
();
fireEvent.(screen.());
(screen.()).();
});
