How can I test a todo-form in react with enzyme

I'm currently writing a test for a simple form:

export const TestComponent = () => {
  const [todos, setTodos] = useState([`Todo 1`, `Todooo 2`]);

  const todoInputRef = useRef<HTMLInputElement>(null);

  return (
    <div className={style.wrapper}> 
      <div className={style.todos}>
        <div className={style.todoList}>
          {todos.map((current, i) => (
            <div className={style.todo} key={`todo-` + i}>
              <span>{current}</span>
            </div>
          ))}
        </div>
        <div className={style.addTodo}>
          <input
            ref={todoInputRef}
            className={style.todoInput}
            type="text"
            placeholder="Type a todo here ..."
          />
          <button
            onClick={() => {
              act(() => {
                const currentTodoInputRef = todoInputRef.current;
                if (currentTodoInputRef) {
                  console.log(currentTodoInputRef);
                  setTodos(todos.concat(currentTodoInputRef.value));
                }
              });
            }}
            type="submit"
          >
            OK
          </button>
        </div>
      </div>
    </div>
  );
};

As you see I have a console.log in the onClick-event of the Button. My problem is, that I'm getting a different ref when I call the event via enzyme.

Ref when I click the button manually: {current: input.TestComponent_todoInput}

When enzyme triggers the event: {current: WrapperComponent {...}}

So how can I get the "real" ref?

In the test code I'm giving the input a value and then I click the button. But the new listitem is always just an empty string because the event of the button click can't read the ref.

My test code:

let wrapper: ShallowWrapper;
beforeEach(() => {
  wrapper = shallow(<TestComponent />);
});

it(`add todo works`, () => {
  const form = mount(
    wrapper
      .find(`div.todos`)
      .find(`div.addTodo`)
      .getElement()
  );
  const input = mount(form.find(`input`).getElement());
  input.props().value = `xyz`;

  const button = form.find(`button`);
  button.simulate(`click`);
});

Thank you for your help.

Kind Regards Luca