Heroes: Testing deletion of a hero

heroes.container.spec.ts

it('emits the specified hero when server fails', fakeAsync(() => {
  heroServiceStub.deleteHero.and.returnValue(
    throwError(new Error('timeout'), asapScheduler));
  const storm: Hero = femaleMarvelHeroes.find(x => x.name === 'Storm');

  container.delete(storm);
  tick();

  const emittedHeroes: Hero[]  = observer.calls.mostRecent().args[0];
  emittedHeroes.sort(compareIdAscending);
  expect(emittedHeroes).toEqual(femaleMarvelHeroes);
}));