`SyntheticEvent.type` is undefined when received by the handler. Or the nativeEvent type for that matter.

Needs to be added in here somewhere: https://github.com/facebook/react/blob/3a4e1dbb5b2957875cab6af11a5e5934e125a0d8/src/test/ReactTestUtils.js#L496

I realize that it's not sustainable to have to set _all_ the possible fields for a simulated event, but the type at least makes sense for verification that you're getting the right _sort_ of event.

var ReactDOMServer;
var ReactTestUtils;
describe('ReactTestUtils', function() {
  beforeEach(function() {
    React = require('React');
    ReactDOM = require('ReactDOM');
    ReactDOMServer = require('ReactDOMServer');
    ReactTestUtils = require('ReactTestUtils');
  });
  it('should have shallow rendering', function() {
    var SomeComponent = React.createClass({
      render: function() {
        return (
          <div>
            <span className="child1" />
            <span className="child2" />
          </div>
        );
      },
    });
    var shallowRenderer = ReactTestUtils.createRenderer();
    var result = shallowRenderer.render(<SomeComponent />);
    expect(result.type).toBe('div');
    expect(result.props.children).toEqual([
      <span className="child1" />,
      <span className="child2" />,
    ]);
  });
  it('should shallow render a functional component', function() {
    function SomeComponent() {