Adding Angular and dependent packages for testing

third_party/pkg/angular/test/directive/ng_a_spec.dart

+library ng_a_spec;
+
+import '../_specs.dart';
+import 'dart:html' as dom;
+
+main() {
+  describe('ADirective', () {
+    TestBed _;
+
+    beforeEach(inject((TestBed tb) => _ = tb));
+
+    it('should bind click listener when href zero length string', inject((Scope scope) {
+      _.compile('<a href="" ng-click="abc = true; event = \$event"></a>');
+      _.triggerEvent(_.rootElement, 'click', 'MouseEvent');
+      expect(_.rootScope['abc']).toEqual(true);
+      expect(_.rootScope['event'] is dom.UIEvent).toEqual(true);
+    }));
+
+    it('should bind click listener when href empty', inject((Scope scope) {
+      _.compile('<a href ng-click="abc = true; event = \$event"></a>');
+      _.triggerEvent(_.rootElement, 'click', 'MouseEvent');
+      expect(_.rootScope['abc']).toEqual(true);
+      expect(_.rootScope['event'] is dom.UIEvent).toEqual(true);
+    }));
+
+    it('should not bind click listener to non empty href', inject((Scope scope) {
+      _.compile('<a href="#"></a>');
+      _.triggerEvent(_.rootElement, 'click', 'MouseEvent');
+      expect(window.location.href.endsWith("#")).toEqual(true);
+    }));
+
+    it('should not cancel click with non-empty interpolated href', inject((Scope scope) {
+      _.compile('<a href="{{url}}" ng-click="abc = true; event = \$event"></a>');
+      _.triggerEvent(_.rootElement, 'click', 'MouseEvent');
+      expect(_.rootScope['abc']).toEqual(true);
+      expect(_.rootScope['event'] is dom.UIEvent).toEqual(true);
+      window.location.href = '#';
+      _.rootScope['url'] = '#url';
+      _.rootScope.$digest();
+      _.triggerEvent(_.rootElement, 'click', 'MouseEvent');
+      expect(window.location.href.endsWith("#url")).toEqual(true);
+    }));
+  });
+}