title: TypeScript cannot find name 'describe'
body: <p>I'm trying to run angular application. I have wiped <code>node_module</code>, reinstall it, install latest typescript version but still I have this error: <code>Cannot find name 'describe'</code>, <code>Cannot find name 'beforeEach'</code> and others are same.</p>
  
  <p>Here is code:</p>
  
  <pre><code>import * as React from 'react';
  import { mount } from 'enzyme';
  
  import { iocContainer } from '../../utils/ioc';
  import { Product } from '../../models/Product';
  import { ProductCreationForm } from './ProductCreationForm';
  import { ProductStore } from '../../stores/ProductStore';
  import * as fileUpload from '../../helpers/fileUpload';
  import { FileDialog } from '../ui';
  
  describe('Product creation form', function () {
  let store: ProductStore;
  
  beforeEach(() =&gt; store = iocContainer.get(ProductStore));
  ...
  </code></pre>
  
  <p>Maybe problem in package.json or webpack?</p>