text: import { render, screen } from "@testing-library/react";
  import { BrowserRouter as Router } from "react-router-dom";
  import FourOhFour from "./404";
  
  test("renders 404", () => {
    render(
      <Router>
        <FourOhFour />
      </Router>
    );
    const header = screen.queryByText(/404 Error/);
    expect(header).not.toBeNull();
  });
  