import Vue from 'vue'; import PageComponent from '~/pdf/page/index.vue'; import mountComponent from 'helpers/vue_mount_component_helper'; jest.mock('pdfjs-dist/webpack', () => { return { default: jest.requireActual('pdfjs-dist/build/pdf') }; }); describe('Page component', () => { const Component = Vue.extend(PageComponent); let vm; afterEach(() => { vm.$destroy(); }); it('renders the page when mounting', done => { const promise = Promise.resolve(); const testPage = { render: jest.fn().mockReturnValue({ promise: Promise.resolve() }), getViewport: jest.fn().mockReturnValue({}), }; vm = mountComponent(Component, { page: testPage, number: 1, }); expect(vm.rendering).toBe(true); promise .then(() => { expect(testPage.render).toHaveBeenCalledWith(vm.renderContext); expect(vm.rendering).toBe(false); }) .then(done) .catch(done.fail); }); });