johnrom

import * as React from 'react';
import * as formik from 'formik';

jest.mock('formik');

it('prints error', () => {
  formik.useFormikContext.mockResolvedValue({ errors: { hello: '' }});
  
  const { container, rerender } = render(<Formik initialValues={{ hello: '' }}><YourErrorField name="hello" /></Formik>);
  expect(container.querySelector('.error')?.textContent).toBe('');