How to mock a single named export with Jest

Using jest.mock('module-name') mocks all exported functions within module-name. Yet, sometimes, you want to mock the implementation of a very specific function (e.g., to play with the returned value) while letting the rest of the module behave as usual. jest.requireActual('module-name') allows you to accomplish that:

jest.mock('react-router-dom', () => ({
    ...jest.requireActual('react-router-dom'),
    useLocation: jest.fn()
}))

In this example, you could mock the behavior of useLocation while keeping the rest of the functionality (for instance the behavior of useNavigate, etc.).