Modified test checking deduplication of 'Functions are not valid as a…

… React child' warning so it will check against rerendering component now

src/renderers/__tests__/ReactComponent-test.js

@@ -545,17 +545,23 @@ describe('ReactComponent', () => {
 
     it('deduplicates function type warnings based on component type', () => {
       spyOn(console, 'error');
-      function Foo() {
-        return (
-          <div>
-            {Foo}{Foo}
-            <span>{Foo}{Foo}</span>
-          </div>
-        );
+      class Foo extends React.PureComponent {
+        constructor() {
+          super();
+          this.state = {type: 'mushrooms'};
+        }
+        render() {
+          return (
+            <div>
+              {Foo}{Foo}
+              <span>{Foo}{Foo}</span>
+            </div>
+          );
+        }
       }
       var container = document.createElement('div');
-      ReactDOM.render(<Foo />, container);
-
+      var component = ReactDOM.render(<Foo />, container);
+      component.setState({type: 'portobello mushrooms'});
       expectDev(console.error.calls.count()).toBe(2);
       expectDev(normalizeCodeLocInfo(console.error.calls.argsFor(0)[0])).toBe(
         'Warning: Functions are not valid as a React child. This may happen if ' +