React 0.14.7: `<option value="">empty</option>` emits empty string on change
http://jsbin.com/pisita/10/edit?html,js,console,output
React 15.0.0-rc.1`<option value="">empty</option>` emits string with value "empty" on change
http://jsbin.com/bemaze/12/edit?html,js,console,output
This is because React 15.0.0-rc.1 cuts off `value=""` from option tag

return <div>{context.lang}</div>;
    }
    Child.contextTypes = {lang: React.PropTypes.string};
    var el = document.createElement('div');
    ReactDOM.render(<Parent />, el);
    expect(el.textContent).toBe('en');
  });
  it('should work with arrow functions', function() {
    var Child = function() {
      return <div />;
    };
    
    
    Child = Child.bind(this);
    expect(() => ReactTestUtils.renderIntoDocument(<Child />)).not.toThrow();
  });
  it('should allow simple functions to return null', function() {
    var Child = function() {
      return null;
    };
    expect(() => ReactTestUtils.renderIntoDocument(<Child />)).not.toThrow();
  });
  it('should allow simple functions to return false', function() {
    function Child() {