import Vue from 'vue'; import StartupError from '@/components/StartupError'; Vue.mixin({ computed: { $t() { return (key, options) => key; }, }, }); describe('StartupError.vue', () => { it('should render correct contents', () => { const vm = new Vue({ el: document.createElement('div'), render: (h) => h(StartupError, { props: { error: 'some error' } }), }); expect(vm.$el.querySelector('div').textContent).toEqual('some error'); }); });