/Javascript/React/Mock createRef jest react functional component

Mock createRef jest react functional component

import React, { useRef } from 'react';
import { shallow } from 'enzyme';
import Child2 from './';

jest.mock('react', () => {
  const originReact = jest.requireActual('react');
  const mUseRef = jest.fn();
  return {
    ...originReact,
    useRef: mUseRef,
  };
});

describe('61782695', () => {
  it('should pass', () => {
    const mRef = { current: { offsetWidth: 100 } };
    useRef.mockReturnValueOnce(mRef);
    const wrapper = shallow(<Child2></Child2>);
    expect(wrapper.find('#myDiv').text()).toBe('123');
    expect(wrapper.find('p').text()).toBe('Div width is: 100');
  });

  it('should pass - 2', () => {
    const mRef = { current: { offsetWidth: 300 } };
    useRef.mockReturnValueOnce(mRef);
    const wrapper = shallow(<Child2></Child2>);
    expect(wrapper.find('#myDiv').text()).toBe('ABC');
    expect(wrapper.find('p').text()).toBe('Div width is: 300');
  });

  it('should pass - 3', () => {
    const mRef = {};
    useRef.mockReturnValueOnce(mRef);
    const wrapper = shallow(<Child2></Child2>);
    expect(wrapper.find('#myDiv').text()).toBe('123');
    expect(wrapper.find('p').text()).toBe('Div width is: ');
  });
});

Source: stackoverflow.com

Similar codes

1 vote337 views1 answer
Circle progress react
Javascript React
2 votes383 views2 answers
React material ui media queries
Javascript React
0 vote370 views1 answer
React detect autofill
Javascript React
1 vote354 views2 answers
React-native array.filter by index arrow function
Javascript React
0 vote348 views1 answer
React import json
Javascript React
0 vote345 views1 answer
A react component can only return]
Javascript React
3 votes401 views2 answers
Error duplicate resources react native
Javascript React
0 vote402 views1 answer
Sort by string react
Javascript React
0 vote323 views3 answers
React-hook-form input
Javascript React
9 votes373 views2 answers
Axios react js
Javascript React