React Testing Library And Jest- The Complete Guide ⚡ Ad-Free

render(<UserProfile userId=1 />)

// Test error states render(<Component onError=mockError />) // Don't test internal state expect(component.state('isOpen')).toBe(true) // Don't use testid as default screen.getByTestId('submit-button') React Testing Library and Jest- The Complete Guide

await user.type(screen.getByLabelText(/email/i), 'user@example.com') await user.type(screen.getByLabelText(/password/i), 'secret123') await user.click(screen.getByRole('button', name: /submit/i )) UserProfile userId=1 /&gt

act(() => jest.advanceTimersByTime(1000) ) ) // Test error states render(&lt

// Test const customRender = (ui, providerProps, ...renderOptions ) => return render( <ThemeProvider ...providerProps>ui</ThemeProvider>, renderOptions )