react_testing_lib.js

function setInputValue(id, value) {
  const input = document.getElementById(id);
  const lastValue = input.value;

  input.value = value;

  // react 16 hack
  let tracker = input._valueTracker;
  if (tracker) {
    tracker.setValue(lastValue);
  }

  input.dispatchEvent(new Event('input', {'bubbles': true, 'cancelable': true}));
}