[Solved]-React & Jest testing: nested component connected to Redux gives Invariant Violation error-Reactjs

import Timer from './Timer';
import { store } from './store';

jest.mock("./index.js", () => "root");

describe('Timer test: ', () => {
  it('should render', () => {
    const wrapper = <Timer store={store} />
    expect(wrapper);
  });
});

import React from 'react';
import { shallow } from 'enzyme';
import { MyComponent } from '../../components/MyComponent';

jest.mock('../../OtherComponent', () => 'OtherComponent')//note that the path is relative to your test files