React test: after update input the props value still not change

Question

I have this code in test

let formatField = subject.find("input").at(0);
(formatField.props() as any).onChange({
     currentTarget: { value: "Potato" }
});

The problem is after this action when I get formatField.props().value it still undefined

Do I missing something?

I tried with

formatField .simulate('change', { target: { value: 'Potato' } });

and also

formatField .simulate('keydown', { keyCode: 13 }); 

the value still not update

Thank you very much!

Answer 1

I found it by my self: need to wait for it update

const waitForAsync = () => new Promise(resolve => setImmediate(resolve));
await waitForAsync();
subject.update(); 

also the simulate change event should like this

 formatField.simulate("change", {
        target: { value: "my value" }
      });