ReactJS Selenium Testing

So I am looking to write integration level tests (where you are talking to a real database and really nothing is mocked) for a ReactJS application and figured Selenium is the default choice for this type of testing. With Angular 1.x, you can tell if angular's digest cycle is still process the DOM which removes the need to add in sleeps which are inefficient and flakey.

Is there something similar in ReactJS that I can use instead of a bunch of flakey sleep commands?