Function timer

packages/core/test/test_bed_spec.ts:1870–1874

(delay: number)

    it('should override providers on dependencies of dynamically loaded components', async () => {
      function timer(delay: number): Promise<void> {
        return new Promise<void>((resolve) => {
          setTimeout(() => resolve(), delay);
        });
      }

      @Injectable({providedIn: 'root'})
      class ImportantService {