usingStoreFactory.test.js

import { mount, createLocalVue } from '@vue/test-utils';
import Vuex from 'vuex';
import CoolCard from '../components/CoolCard.vue';
import StoreFactory from './utils/StoreFactory';

const localVue = createLocalVue();
localVue.use(Vuex);

const actions = {
  incrementTotal: jest.fn()
};

describe('CoolCard', () => {
  let store;
  beforeEach(() => {
    store = StoreFactory(
      {
        basket: { currentTotal: 567 }
      },
      actions
    );
  });
  test('card should show correct total', () => {
    const wrapper = mount(CoolCard, { store, localVue });
    expect(wrapper.vm.currentTotal).toEqual(567);
  });
});