Merge pull request #5 from SmaatoUI/bug/patch-0.0.3

Fix minor bug with 0.0.3 release and add notes to README.

Author: cjcenizal

README.md

@@ -156,6 +156,11 @@ it('references the mocked state object', (done) => {
 Use this factory to test React components' state by passing in various props,
 inspecting their DOM, and simulating user interactions.
 
+**WARNING:** Methods for finding child Components won't work unless the root
+component is a _composite Component_ (e.g. a Component you've defined), not a
+_native Component_ (e.g. div or table). This seems related to
+[this React issue](https://github.com/facebook/react/issues/1533#issuecomment-52243372).
+
 ```javascript
 // Construction via factory methods:
 it('accepts a ReactElement and returns a TestCase instance', () => {

src/TestCaseFactory.js

@@ -52,7 +52,7 @@ function createFromElement(reactElement) {
   }
 
   // Disallow elements created from stateless functional components.
-  if (!reactElement.type.prototype.render) {
+  if (reactElement.type.prototype && !reactElement.type.prototype.render) {
     throw new Error('createFromElement expects an instance of a React Class (i.e. a class with a render method) but no render method was found.');
   }