Merge pull request #2800 from jsfb/getDOMNode-becomes-findDOMNode

Minor updates to findDOMNode, as per additional post-commit CR feedback.

Author: jimfb

src/browser/__tests__/findDOMNode.-test.js

@@ -42,8 +42,8 @@ describe('findDOMNode', function() {
 
   it('findDOMNode should reject unmounted objects with render func', function() {
     expect(function() {React.findDOMNode({render: function(){}});})
-      .toThrow('Invariant Violation: Component contains `render` ' +
-        'method but is not mounted in the DOM'
+      .toThrow('Invariant Violation: Component (with keys: render) ' +
+        'contains `render` method but is not mounted in the DOM'
       );
   });
 

src/browser/findDOMNode.js

@@ -11,8 +11,6 @@
  */
 
 "use strict";
-
-var ReactComponent = require('ReactComponent');
 var ReactInstanceMap = require('ReactInstanceMap');
 var ReactMount = require('ReactMount');
 
@@ -36,8 +34,10 @@ function findDOMNode(componentOrElement) {
     return ReactMount.getNodeFromInstance(componentOrElement);
   }
   invariant(
-    !(componentOrElement.render != null && typeof(componentOrElement.render) === 'function'),
-    'Component contains `render` method but is not mounted in the DOM',
+    componentOrElement.render == null ||
+    typeof(componentOrElement.render) !== 'function',
+    'Component (with keys: %s) contains `render` method '
+    +'but is not mounted in the DOM',
     Object.keys(componentOrElement)
   );
   invariant(