react jest in inputbox

InputBox-test.js

jest.dontMock('../InputBox.js');

var React = require('react/addons');
var TestUtils = React.addons.TestUtils;
var InputBox = require('../InputBox.js');

describe('InputBox', function () {
  it('type will change the value and state', function () {
    var inputBox = TestUtils.renderIntoDocument(<InputBox />);
    var inputBoxDOM = TestUtils.findRenderedDOMComponentWithTag(inputBox, 'input').getDOMNode();

    TestUtils.Simulate.change(inputBoxDOM, { target: { value: 'eat dinner'}});

    expect(inputBoxDOM.getAttribute('value')).toEqual('eat dinner');
  });

  it('Press Enter will clean inputBox', function(){
    var inputBox = TestUtils.renderIntoDocument(<InputBox />);
    var inputBoxDOM = TestUtils.findRenderedDOMComponentWithTag(inputBox, 'input').getDOMNode();
    TestUtils.Simulate.change(inputBoxDOM, { target: { value: 'yo'}});
    TestUtils.Simulate.keyDown(inputBoxDOM, { key: "Enter", keyCode: 13 });

    expect(inputBoxDOM.getAttribute('value')).toEqual('');
  });
});

InputBox.js

var React = require('react');

var InputBox = React.createClass({
  getInitialState: function() {
    return { value: '' };
  },
  handleKeyDown: function(evt) {
    if(evt.keyCode === 13)
    {
      console.log(evt.target.value);
     this.setState({ value: '' });
    }
  },

  handleChange: function(evt) {
    this.setState({ value: evt.target.value });
  },
  render: function(){
    return (
    <div>
      <input type="text" placeholder="Input todo"
      value={this.state.value}
      onKeyDown={this.handleKeyDown}
      onChange={this.handleChange} />
    </div>
    );
  }
});