Unit-Testing Expliziter Ressourcenverwaltung (Symbol.dispose) in Hook-Cleanups

import { renderHook } from '@testing-library/react';
import { useEffect } from 'react';
 
function useExplicitResource(resource) {
  useEffect(() => {
    return () => {
      if (typeof resource[Symbol.dispose] === 'function') {
        resource[Symbol.dispose]();
      }
    };
  }, [resource]);
}
 
test('disposes resource on unmount', () => {
  const disposeSpy = jest.fn();
  const mockResource = { [Symbol.dispose]: disposeSpy };
  const { unmount } = renderHook(() => useExplicitResource(mockResource));
  unmount();
  expect(disposeSpy).toHaveBeenCalledTimes(1);
});