message: Add unit tests for Calendar.jsx component
diff: import React from 'react';
  import moment from 'moment';
  -import { shallow } from '../test-utils';
  +import { shallow, utilsToUse } from '../test-utils';
  import { Calendar } from '../../src/DatePicker/Calendar';
  describe('Calendar', () => {
  @@ -15,3 +15,21 @@ describe('Calendar', () => {
  expect(component).toBeTruthy();
  });
  });
  +
  +describe('Calendar - disabled selected date on mount', () => {
  + let component;
  +
  + beforeEach(() => {
  + component = shallow(<Calendar
  + classes={{}}
  + date={utilsToUse.date('01-01-2017')}
  + minDate="01-01-2018"
  + onChange={jest.fn()}
  + />);
  + });
  +
  + it('Should dispatch onDateSelect on mount', () => {
  + const { onChange } = component.instance().props;
  + expect(onChange).toHaveBeenCalledWith(utilsToUse.date('01-01-2018'));
  + });
  +});
  