React Testing Library And Jest- The Complete Guide
useEffect(() => fetch( /api/users/$userId ) .then(res => res.json()) .then(setUser) .catch(setError); , [userId]);
const mockFn = jest.fn() mockFn('hello') expect(mockFn).toHaveBeenCalledWith('hello') expect(mockFn).toHaveBeenCalledTimes(1) React Testing Library and Jest- The Complete Guide
if (!user) return <div>Loading...</div> return <div>user.name</div> useEffect(() => fetch( /api/users/$userId )
If you need to install them manually in an existing project, run: fetch( /api/users/$userId ) .then(res =>
