Adding Angular and dependent packages for testing

third_party/pkg/angular/test/bootstrap_spec.dart

+library bootstrap_spec;
+
+import '_specs.dart';
+
+main() => describe('bootstrap', () {
+  BodyElement body = window.document.querySelector('body');
+
+  it('should default to whole page', () {
+    body.innerHtml = '<div>{{"works"}}</div>';
+    ngBootstrap();
+    expect(body.innerHtml).toEqual('<div>works</div>');
+  });
+
+  it('should compile starting at ng-app node', () {
+    body.setInnerHtml(
+        '<div>{{ignor me}}<div ng-app ng-bind="\'works\'"></div></div>',
+        treeSanitizer: new NullTreeSanitizer());
+    ngBootstrap();
+    expect(body.text).toEqual('{{ignor me}}works');
+  });
+
+  it('should compile starting at ng-app node', () {
+    body.setInnerHtml(
+        '<div>{{ignor me}}<div ng-bind="\'works\'"></div></div>',
+        treeSanitizer: new NullTreeSanitizer());
+    ngBootstrap(element:body.querySelector('div[ng-bind]'));
+    expect(body.text).toEqual('{{ignor me}}works');
+  });
+});