old_contents: jest.dontMock('./Header.jsx');
  
  import React from 'react';
  import ReactDOM from 'react-dom';
  import TestUtils from 'react-addons-test-utils';
  
  const Header = require('./Header.jsx').default;
  
  describe('Header', () => {
  
    it('should render into the document', () => {
  
      // Render a checkbox with label in the document
      var component = TestUtils.renderIntoDocument(
        <Header />
      );
  
      var node = ReactDOM.findDOMNode(component);
  
      expect(node).toBeDefined();
    });
  
  });
  
new_contents: jest.dontMock('./Header.jsx');
  
  import React from 'react';
  import ReactDOM from 'react-dom';
  import TestUtils from 'react-addons-test-utils';
  
  const Header = require('./Header.jsx').default;
  
  describe('Header', () => {
  
    it('should render into the document', () => {
  
      // Render a checkbox with label in the document
      var component = TestUtils.renderIntoDocument(
        <Header />
      );
  
      var node = ReactDOM.findDOMNode(component);
  
      expect(node).toBeDefined();
      expect(node.textContent).toEqual('Sails + React + Webpack');
    });
  
  });
  
subject: update tests