public async Task IndexPack_Success()
{
//Arrange
var packs = new List <PackToDelivery> {
new PackToDelivery(), new PackToDelivery()
};
deliveryService.Setup(x => x.GetPacks(It.IsAny <PackFilteringData>())).Returns(Task.FromResult(packs));
//Act
var action = await deliveryController.IndexPack(It.IsAny <PackFilteringData>()) as ViewResult;
var model = action.Model as PacksViewModel;
//Assert
Assert.Equal(packs.Count, model.Packs.Count);
}