TieredMenu: rootmenu coming as undefined for 'onOverlayAnimationStart'

[ShrutiBaghel]

Describe the bug

While running all the specs in jasmine-karma framework I get an error,
ERROR: 'ERROR', TypeError: Cannot read properties of undefined (reading 'sublistViewChild')
TypeError: Cannot read properties of undefined (reading 'sublistViewChild')
at TieredMenu.onOverlayAnimationStart

This has been started from primeng version 16.1.0 and not before that.
As it doesn't talk about any particular spec file in my application instead navigates to zone.testing I am not sure how to go ahead with it.

Environment

angular version 16.2.6
primeng version 16.4.1

Reproducer

No response

Angular version

16.2.6

PrimeNG version

16.4.1

Build / Runtime

Angular CLI App

Language

TypeScript

Node version (for AoT issues node --version)

16.19.0

Browser(s)

No response

Steps to reproduce the behavior

No response

Expected behavior

No response

[Kateriine]

For my concern I could solve it with this (standalone components) - Source

describe('SomeComponent', () => {

  const fakeActivatedRoute = {
    snapshot: { data: { ... } }
  } as ActivatedRoute;

  beforeEach(async(() => {
    TestBed.configureTestingModule({ 
      declarations: [ SomeComponent ],
      providers: [ {provide: ActivatedRoute, useValue: fakeActivatedRoute} ],
    })
    .compileComponents();
  }));
});

[ShrutiBaghel]

The problem was with my specs, found the issue hence closing. Thanks