Function tick

packages/zone.js/lib/zone-spec/fake-async-test.ts:1034–1036

(millis: number = 0, ignoreNestedTimeout = false)

 * @experimental
 */
export function tick(millis: number = 0, ignoreNestedTimeout = false): void {
  _getFakeAsyncZoneSpec().tick(millis, null, ignoreNestedTimeout);
}

/**
 * Simulates the asynchronous passage of time for the timers in the fakeAsync zone by