public async Task ChangeQuantityoftheBasketItemAsync_ShouldThrowfQuantityisLessThanOne()
{
var inMemoryBasketRepo = new InMemoryBasketRepository(_mockBasketLogger.Object);
var basketService = new BasketService(inMemoryBasketRepo, _catalogService, _mockServiceLogger.Object);
await Assert.ThrowsAsync <ArgumentException>(() =>
basketService.ChangeQuantityoftheBasketItemAsync(_testItemId1, 0, _testUserId1));
}
public async Task ChangeQuantityoftheBasketShouldReturnNullIfNoItemIsPresentInBasket()
{
var inMemoryBasketRepo = new InMemoryBasketRepository(_mockBasketLogger.Object);
var basketService = new BasketService(inMemoryBasketRepo, _catalogService, _mockServiceLogger.Object);
var result =
await basketService.ChangeQuantityoftheBasketItemAsync(_testItemId1, _testQuantity1, _testUserId1);
result.ShouldBeNull();
}
public async Task ChangeQuantityoftheBasketShouldSaveNewQuantityIfItemIsPresentInBasket()
{
var inMemoryBasketRepo = new InMemoryBasketRepository(_mockBasketLogger.Object);
var basketService =
new BasketService(inMemoryBasketRepo, _catalogService, _mockServiceLogger.Object);
var basket = await basketService.GetOrCreateBasketforUserAsync(_testUserId1);
var updatedBasket =
await basketService.ChangeQuantityoftheBasketItemAsync(_testItemId1, _testQuantity1, _testUserId1);
updatedBasket.ShouldBeNull();
basket.AddItem(_testItemId1, 1, 1, null);
updatedBasket =
await basketService.ChangeQuantityoftheBasketItemAsync(_testItemId1, _testQuantity1, _testUserId1);
updatedBasket.Items.First().Quantity.ShouldBe(_testQuantity1);
}