Adding Angular and dependent packages for testing

third_party/pkg/angular/test/routing/routing_spec.dart

+library routing_spec;
+
+import '../_specs.dart';
+import 'package:angular/routing/module.dart';
+import 'package:angular/mock/module.dart';
+
+main() {
+  describe('routing', () {
+    TestBed _;
+    TestRouteInitializer initer;
+    Router router;
+
+    beforeEach(module((Module m) {
+      router = new Router(useFragment: false, windowImpl: new MockWindow());
+      m
+        ..install(new AngularMockModule())
+        ..type(RouteInitializer, implementedBy: TestRouteInitializer)
+        ..value(Router, router);
+    }));
+
+    beforeEach(inject((TestBed tb, RouteInitializer _initer) {
+      _ = tb;
+      initer = _initer;
+    }));
+
+
+    it('should call init of the RouteInitializer once', async(() {
+      expect(initer.calledInit).toEqual(0);
+
+      // Force the routing system to initialize.
+      _.compile('<ng-view></ng-view>');
+
+      expect(initer.calledInit).toEqual(1);
+      expect(initer.router).toBe(router);
+    }));
+
+  });
+}
+
+class TestRouteInitializer implements RouteInitializer {
+  int calledInit = 0;
+  Router router;
+
+  void init(Router router, ViewFactory view) {
+    calledInit++;
+    this.router = router;
+  }
+}