/Javascript/React/Mock a function jest react

Mock a function jest react

import React from 'react';
import { render } from '@testing-library/react';
import '@testing-library/jest-dom/extend-expect'
import App from './App';

import { randomNameGenerator } from "./utils";

jest.mock('./utils.js', () => ({ 
  randomNameGenerator: jest.fn()
}));

describe('test', () => {
  it('allows Jest method mocking 1', () => {
    randomNameGenerator.mockImplementation(() => "Craig");
    const { getByText } = render(<App />);
    expect(getByText("Craig")).toBeInTheDocument()
  });

  it('allows Jest method mocking 2', () => {
    randomNameGenerator.mockImplementation(() => "Not Craig");
    const { getByText } = render(<App />);
    expect(getByText("Not Craig")).toBeInTheDocument()
  });
});

Source: stackoverflow.com

Similar codes

0 vote210 views1 answer
Reactjs change fill color .svg
Javascript React
0 vote227 views1 answer
11. Which of the following metals catch fire on reaction with air? A. Magnesium B. Manganese C. Potassium D. Calcium
Javascript React
0 vote219 views1 answer
Check uncek react-bootstrap-table reactjs
Javascript React
0 vote222 views1 answer
Storybook react router
Javascript React
0 vote205 views1 answer
Load all icon from a folder in react
Javascript React
1 vote223 views1 answer
Button doesn't work while keyboard is shown react native
Javascript React
9 votes247 views5 answers
Find react version
Javascript React
0 vote203 views2 answers
.env file example react native
Javascript React
0 vote265 views1 answer
How to change height of bottom material tab navigator from react-naviagtion
Javascript React
0 vote202 views1 answer
Images not displaying in react
Javascript React