Is there a way to test Observable subscription in Angular?

I'm new to angular, trying to write unit test case for the below function.

HomeComponent.ts

 ngOnInit() {
    this.msalBroadcastService.inProgress$
      .pipe(
        filter((status: InteractionStatus) => status === InteractionStatus.None),
        takeUntil(this._destroying$)
      )
      .subscribe(() => {
        this.YesNo = [
          { label: 'Yes', value: 'Yes' },
          { label: 'No', value: 'No' },
        ];
 
        this.cols = [
          { field: 'Human', header: 'name', width: '5' },
          { field: 'MaritalStatus', header: 'Marital Status', width: '8' },
      ];
        this.getAllAccounts();
      });
  }

I tried the below test case, but I'm not sure how to cover YesNo, cols , getAllAccounts()

HomeComponent.spec.ts

class MockUserService {
    inProgress = of("Login");
  }
  describe('AccountComponent', () => {
    let UserService;
    let comp;
    let userService;
    let testInteractionStatus: InteractionStatus.None;
    beforeEach(() => {
      TestBed.configureTestingModule({
        providers: [
          {
            provide: UserService,
            useClass: MockUserService
          },
          MsalService,
          MsalGuard,
          MsalBroadcastService,
          MessageService,
          HomeService,
          HomeComponent
      ],
        imports: [HttpClientTestingModule, RouterTestingModule],
        declarations: [
            HomeComponent
        ],
      }).compileComponents();
    });
  it('should test....', () => {
    const fixture = TestBed.createComponent(HomeComponent);
    const app = fixture.debugElement.componentInstance;
    app.ngOnInit();
    fixture.detectChanges();
    expect(userService.inProgress.YesNo).toBeDefined();
    expect(userService.inProgress.YesNo).toBeDefined();

  });

• Angular Version

Angular CLI: 12.2.6 Node: 14.17.6 Package Manager: npm 7.23.0 OS: darwin x64