How would I mock a MutationRecord when testing with JEST

I have a function that does some operations with the MutationRecords collected in a MutationObserver. I would like to test the operations done to these mutations in an unit test. I am using JEST.

I found a way to mock the MutationObserver, but would like to mock the MutationRecords too.

This is my .spec.ts

import { functionWithMutationObserverInside } from "./testingQuestion"

const mutationObserverMock = jest
  .fn<MutationObserver, [MutationCallback]>()
  .mockImplementation(() => {
    return {
      observe: jest.fn(),
      disconnect: jest.fn(),
      takeRecords: jest.fn(),
    }
  })

global.MutationObserver = mutationObserverMock

const mutations: MutationRecord[] = []

describe("MutationObserver", () => {
  it("checks if MutiationObserver is called", () => {
    functionWithMutationObserverInside()
    const observerCb = mutationObserverMock.mock.calls[0][0]
    observerCb(mutations, mutationObserverMock.mock.instances[0])
  })
})

Thanks!