If user writes for instead of htmlFor, warning is shown. I suppose autofocus instead of autoFocus should warn too.

instance = ReactDOM.render(instance, container);
      var rootNode = ReactDOM.findDOMNode(instance);
      var inst = ReactDOMComponentTree.getInstanceFromNode(rootNode);
      expect(
        EventPluginHub.getListener(inst, 'onClick')
      ).toBe(callback);
      expect(rootNode).toBe(ReactDOM.findDOMNode(instance));
      ReactDOM.unmountComponentAtNode(container);
      expect(
        EventPluginHub.getListener(inst, 'onClick')
      ).toBe(undefined);
    });
    it('should clean up input value tracking', () => {
      var container = document.createElement('div');
      var node = ReactDOM.render(<input type="text" defaultValue="foo"/>, container);
      var tracker = inputValueTracking._getTrackerFromNode(node);
      spyOn(tracker, 'stopTracking');
      ReactDOM.unmountComponentAtNode(container);
      expect(tracker.stopTracking.calls.count()).toBe(1);
    });
    it('should clean up input textarea tracking', () => {
      var container = document.createElement('div');
      var node = ReactDOM.render(<textarea defaultValue="foo"/>, container);
      var tracker = inputValueTracking._getTrackerFromNode(node);
      spyOn(tracker, 'stopTracking');
      ReactDOM.unmountComponentAtNode(container);
      expect(tracker.stopTracking.calls.count()).toBe(1);
    });
    it('unmounts children before unsetting DOM node info', () => {
      class Inner extends React.Component {