Mailspring/app/internal_packages/send-later/specs/send-later-popover-spec.jsx

import React from 'react';
import { mount } from 'enzyme';
import SendLaterPopover from '../lib/send-later-popover';

const makePopover = (props = {}) => {
  return mount(
    <SendLaterPopover
      sendLaterDate={null}
      onSendLater={() => {}}
      onAssignSendLaterDate={() => {}}
      onCancelSendLater={() => {}}
      {...props}
    />
  );
};

describe('SendLaterPopover', function sendLaterPopover() {
  describe('render', () => {
    it('renders cancel button if scheduled', () => {
      const onCancelSendLater = jasmine.createSpy('onCancelSendLater');
      const popover = makePopover({ onCancelSendLater, sendLaterDate: new Date() });
      const button = popover.find('.btn-cancel');
      button.simulate('click');
      expect(onCancelSendLater).toHaveBeenCalled();
    });
  });
});