synapse-admin/src/App.test.tsx

import { render, screen } from "@testing-library/react";
import fetchMock from "jest-fetch-mock";
fetchMock.enableMocks();

import App from "./App";

describe("App", () => {
  it("renders", async () => {
    render(<App />);
    await screen.findAllByText("Welcome to Synapse-admin");
  });
});