fix(introspection): Export all symbols. And a test.

Author: jbdeboer

lib/introspection.dart

@@ -76,11 +76,11 @@ List<Object> ngDirectives(dom.Node node) {
 }
 
 _publishToJavaScript() {
-  js.context
-      ..['ngProbe'] = (dom.Node node) => _jsProbe(ngProbe(node))
-      ..['ngInjector'] = (dom.Node node) => _jsInjector(ngInjector(node))
-      ..['ngScope'] = (dom.Node node) => _jsScope(ngScope(node))
-      ..['ngQuery'] = (dom.Node node, String selector, [String containsText]) =>
+  // Point of style here: cascades require too many ()s, reducing readability.
+  js.context['ngProbe'] = (dom.Node node) => _jsProbe(ngProbe(node));
+  js.context['ngInjector'] = (dom.Node node) => _jsInjector(ngInjector(node));
+  js.context['ngScope'] = (dom.Node node) => _jsScope(ngScope(node));
+  js.context['ngQuery'] = (dom.Node node, String selector, [String containsText]) =>
           new js.JsArray.from(ngQuery(node, selector, containsText));
 }
 

test/introspection_spec.dart

@@ -1,6 +1,7 @@
 library introspection_spec;
 
 import '_specs.dart';
+import 'dart:js' as js;
 
 void main() {
   describe('introspection', () {
@@ -35,5 +36,13 @@ void main() {
       shadowRoot.innerHtml = '<ul><li>stash</li><li>secret</li><ul>';
       expect(toHtml(ngQuery(div, 'li'))).toEqual('<li>stash</li><li>secret</li>');
     });
+
+    it('should be available from Javascript', () {
+      ngBootstrap(element: new Element.html('<div></div>'));
+      expect(js.context['ngProbe']).toBeDefined();
+      expect(js.context['ngScope']).toBeDefined();
+      expect(js.context['ngInjector']).toBeDefined();
+      expect(js.context['ngQuery']).toBeDefined();
+    });
   });
-}
+}