Hook testing: useReducer doesn't updating state when the reducer action is executed about react-testing-library HOT 2 CLOSED

describe('Reducer operations', () => {
  test('add operation', () => {
    const PAYLOAD = 'test';
    const { result } = renderHook(() => useReducer(stringReducer, []));
    
    act(() => {
      const dispatch = result.current[1];
      dispatch({ actionType: 'add', payload: PAYLOAD });
    });

    const [states] = result.current;
    expect(states.length).toBe(1);
    expect(states.at(0)).toBe(PAYLOAD);
  });

  test('remove operation', () => {
    const INITIAL_STATE = ['test', 'remove', 'remaining'];
    const REMOVED_STATE = 'remove';

    const { result } = renderHook(() =>
      useReducer(stringReducer, INITIAL_STATE)
    );
    

    act(() => {
      const dispatch = result.current[1];
      dispatch({ actionType: 'remove', payload: REMOVED_STATE });
    });

    const [states] = result.current
    expect(states.length).toBe(2);
    expect(states.some((name) => name === REMOVED_STATE)).toBe(false);
  });
});