Method onHasTask

packages/zone.js/lib/zone-spec/async-test.ts:199–223

(delegate: ZoneDelegate, current: Zone, target: Zone, hasTaskState: HasTaskState)

  }

  onHasTask(delegate: ZoneDelegate, current: Zone, target: Zone, hasTaskState: HasTaskState) {
    delegate.hasTask(target, hasTaskState);
    // We should only trigger finishCallback when the target zone is the AsyncTestZone
    // Consider the following cases.
    //
    // const childZone = asyncTestZone.fork({
    //   name: 'child',
    //   onHasTask: ...
    // });
    //
    // So we have nested zones declared the onHasTask hook, in this case,
    // the onHasTask will be triggered twice, and cause the finishCallbackIfDone()
    // is also be invoked twice. So we need to only trigger the finishCallbackIfDone()
    // when the current zone is the same as the target zone.
    if (current !== target) {
      return;
    }
    if (hasTaskState.change == 'microTask') {
      this._pendingMicroTasks = hasTaskState.microTask;
      this._finishCallbackIfDone();
    } else if (hasTaskState.change == 'macroTask') {
      this._pendingMacroTasks = hasTaskState.macroTask;
      this._finishCallbackIfDone();
    }
  }
}

export function patchAsyncTest(Zone: ZoneType): void {