Adding Angular and dependent packages for testing

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

+library ng_bind_spec;
+
+import '../_specs.dart';
+
+main() {
+  describe('BindDirective', () {
+    TestBed _;
+
+    beforeEach(inject((TestBed tb) => _ = tb));
+
+    it('should set.text', inject((Scope scope, Injector injector, Compiler compiler) {
+      var element = $('<div ng-bind="a"></div>');
+      compiler(element)(injector, element);
+      scope.a = "abc123";
+      scope.$digest();
+      expect(element.text()).toEqual('abc123');
+    }));
+
+
+    it('should bind to non string values', inject((Scope scope) {
+      var element = _.compile('<div ng-bind="value"></div>');
+
+      scope.$apply(() {
+        scope['value'] = null;
+      });
+      expect(element.text).toEqual('');
+
+      scope.$apply(() {
+        scope['value'] = true;
+      });
+      expect(element.text).toEqual('true');
+
+      scope.$apply(() {
+        scope['value'] = 1;
+      });
+      expect(element.text).toEqual('1');
+    }));
+  });
+}