public async Task CallImplement_MustNothingToDo()
{
var lister = new NullDownloadListener();
await lister.BeginFetchPageAsync(null);
await lister.CanceledAsync(null);
await lister.ComplatedSaveAsync(null);
await lister.EndFetchPageAsync(null);
await lister.FetchPageExceptionAsync(null);
await lister.NotNeedToSaveAsync(null);
await lister.ReadyFetchAsync(null);
await lister.ReadySaveAsync(null);
}
