import React from "react"; import { render, waitFor } from "@testing-library/react"; import DownloadCerts from "./DownloadCerts"; import addSnapshotSerializer from "../../../utils/snapshot"; describe("DownloadCerts", () => { beforeAll(() => { global.URL.createObjectURL = jest.fn(); global.URL.revokeObjectURL = jest.fn(); addSnapshotSerializer(expect); }); it("Render", async () => { const { container } = render( ); await waitFor(() => { /* render */ }); expect(container).toMatchSnapshot(); }); });