reproduction

repro.ts

fit('Then follow through navigation reproduction', async () => {
      let isAuthenticated$ = new ReplaySubject<boolean>(1);
      let mockedAuthStore = jasmine.createSpyObj<AuthStore>(AuthStore.name, [], {
        isAuthenticated$
      });

      const router = await minimalRender(
        [
          { path: '', component: DummyHomeComponent },
          ...routes
        ],
        [{ provide: AuthStore, useValue: mockedAuthStore }]
      );

      // for some reason it's ok to invoke here
      router.initialNavigation();
      
      isAuthenticated$.next(false);
      let canNavigate = await router.navigate([testUrl]);
      expect(canNavigate).toEqual(true);
    });

    async function minimalRender(routes: any[], providers: any[]) {
      await TestBed.configureTestingModule({
        imports: [
          RouterTestingModule.withRoutes(routes)
        ],
        providers: [...providers]
      }).compileComponents();
      TestBed.createComponent(DummyRootComponent);

      const router = TestBed.inject(Router);

      // uncomment and the test fails
      // router.initialNavigation();
      return router;
    }