import { shallowMount } from '@vue/test-utils'; import Calc from '@/components/Calc.vue'; let url = ''; let data = ''; const mockHttp = { get: (_url, _data) => { return new Promise((resolve) => { url = _url; data = _data; resolve(); }); } }; describe('Books', () => { const wrapper = shallowMount(Calc); it('Calc is a component', () => { // expect(wrapper.isVueInstance()).toBeTruthy() wrapper.setData({ number1: 1}); }); });