Spy on the result of an Observable Subscription with Jasmine

Question

I am Jasmine unit testing an angular component, which uses Observables. My component has this lifecycle hook that I am testing:

ngOnInit() {
  this.dataService.ge         


        

Answer 1

Did you ever come up with a solution? What about using the jasmine-marbles package and the complete event?

it('should update chart on new data', () => {
    const obs$ = cold('--a-|');
    spyOn(service, 'getCellOEE').and.returnValue(obs$);
    component.ngOnInit(); 
    obs$.subscribe({
        complete: () => {
            expect(component.updateChart).toHaveBeenCalledWith('a');
        }
    });
});