Update TestUtils.findRenderedComponentWithType

This function gets that actual React component rather than
the element. This allows the tester to call functions like setState
on the component as shown in the new test.

react-addons/react-addons-tests.ts

@@ -113,21 +113,27 @@ React.addons.TestUtils.Simulate.click(node);
 React.addons.TestUtils.Simulate.change(node);
 React.addons.TestUtils.Simulate.keyDown(node, {key: "Enter"});
 
-var GoodbyeMessage = React.createClass({displayName: 'GoodbyeMessage',
+var Greeting = React.createClass({displayName: 'Greeting',
+    getInitialState: function() {
+        return {morning: true};
+    },
     render: function() {
-        return React.DOM.div(null, "Goodbye ", (<React.Component<{name: string}, any>>this).props.name);
+        var me = <React.Component<{name: string}, {morning: boolean}>>this;
+        return React.DOM.div(null, (me.state.morning ? "Hello" : "Goodbye "), me.props.name);
     }
 });
-React.addons.TestUtils.renderIntoDocument(GoodbyeMessage({name: "John"}));
+
+var root = React.addons.TestUtils.renderIntoDocument(Greeting({name: "John"}));
+var greeting = React.addons.TestUtils.findRenderedComponentWithType(root, Greeting);
+greeting.setState({
+    morning: false
+});
 
 var isImportant: boolean;
 var isRead: boolean;
 var cx = React.addons.classSet;
-var classes = cx({
+var classes: string = cx({
     'message': true,
     'message-important': isImportant,
     'message-read': isRead
 });
-
-
-

react-addons/react-addons.d.ts

@@ -93,8 +93,9 @@ declare module React {
         findRenderedDOMComponentWithClass(tree: ReactElement<any, any>, className: string): ReactElement<any, any>;
         scryRenderedDOMComponentsWithTag(tree: ReactElement<any, any>, className: string): ReactElement<any, any>[];
         findRenderedDOMComponentWithTag(tree: ReactElement<any, any>, tagName: string): ReactElement<any, any>;
-        scryFindRenderedComponentsWithTag(tree: ReactElement<any, any>, componentClass: Function): ReactElement<any, any>[];
-        findRenderedComponentWithType(tree: ReactElement<any, any>, componentClass: Function): ReactElement<any, any>;
+        scryRenderedComponentsWithTag(tree: ReactElement<any, any>, componentClass: Function): ReactElement<any, any>[];
+        findRenderedComponentWithType<P>(tree: ReactElement<any, any>, componentClass: ReactComponentFactory<P>): Component<P, any>;
+        scryRenderedComponentsWithType<P>(tree: ReactElement<any, any>, componentClass: ReactComponentFactory<P>): Component<P, any>[];
     }
 
     export interface SyntheticEventData {