SpyCalledTwice.js

import React from 'react';
import { mount } from 'enzyme';
import { Plot } from '../<InsertDirHere>';

describe('Plot', () => {
  describe('<Plot/> Component', () => {
    const data = [];
    const id = 'Chart_1';
    const layout = {};
    const afterDrawMock = jest.fn();
    const props = { id, data, layout, afterDraw: afterDrawMock };
    it('should call drawPlot method', () => {
      console.log('Call sequence');
      const spyDrawPlot = jest.spyOn(Plot.prototype, 'drawPlot');
      console.log('Call after spying');
      const wrapper = mount(<Plot {...props}></Plot>);
      wrapper.instance().componentDidMount();
      expect(spyDrawPlot).toHaveBeenCalled();
    });
  });
});