Unit testing routes and middleware

import { csrfCheckMiddleware } from './csrf'; // this is a middleware i wrote with `createMiddleware`

  it('throws a 401 Unauthorized error if no Authorization header is present', async () => {
    vi.spyOn(serverUtils, 'getHeaders').mockReturnValue({});

    const next = vi.fn();

    await expect(
      csrfCheckMiddleware({ next }) //this is not callable :(
    ).rejects.toThrow(); 

    expect(next).not.toHaveBeenCalled();
  });

import { csrfCheckMiddleware } from './csrf'; // this is a middleware i wrote with `createMiddleware`

  it('throws a 401 Unauthorized error if no Authorization header is present', async () => {
    vi.spyOn(serverUtils, 'getHeaders').mockReturnValue({});

    const next = vi.fn();

    await expect(
      csrfCheckMiddleware({ next }) //this is not callable :(
    ).rejects.toThrow(); 

    expect(next).not.toHaveBeenCalled();
  });