public void VMListensToShoppingCartUpdatedEvent_ThenCalculatesTotalNumberOfItemsInCart()
{
var shoppingCart = new ShoppingCart(new List<ShoppingCartItem>());
var shoppingCartRepository = new MockShoppingCartRepository();
shoppingCartRepository.GetShoppingCartAsyncDelegate = () => Task.FromResult(shoppingCart);
var shoppingCartUpdatedEvent = new ShoppingCartUpdatedEvent();
var eventAggregator = new MockEventAggregator();
eventAggregator.GetEventDelegate = type =>
{
if (type == typeof(ShoppingCartUpdatedEvent)) return shoppingCartUpdatedEvent;
if (type == typeof(ShoppingCartItemUpdatedEvent)) return new ShoppingCartItemUpdatedEvent();
return null;
};
var accountService = new MockAccountService();
accountService.GetSignedInUserAsyncDelegate = () => Task.FromResult((UserInfo)null);
var target = new ShoppingCartTabUserControlViewModel(shoppingCartRepository, eventAggregator, null, new AlertMessageService(), null, accountService);
shoppingCart = new ShoppingCart(new List<ShoppingCartItem>()
{
new ShoppingCartItem {Quantity = 1},
new ShoppingCartItem {Quantity = 2}
});
Assert.AreEqual(0, target.ItemCount);
shoppingCartUpdatedEvent.Publish(null);
Assert.AreEqual(3, target.ItemCount);
}
public void ExecutingShoppingCartCommand_NavigatesToShoppingCart()
{
var navigateCalled = false;
var navigationService = new MockNavigationService();
navigationService.NavigateDelegate = (s, o) =>
{
Assert.AreEqual("ShoppingCart", s);
navigateCalled = true;
return true;
};
var eventAggregator = new MockEventAggregator();
eventAggregator.GetEventDelegate = type =>
{
if (type == typeof(ShoppingCartUpdatedEvent)) return new ShoppingCartUpdatedEvent();
if (type == typeof(ShoppingCartItemUpdatedEvent)) return new ShoppingCartItemUpdatedEvent();
return null;
};
var shoppingCartRepository = new MockShoppingCartRepository();
shoppingCartRepository.GetShoppingCartAsyncDelegate = () => Task.FromResult(new ShoppingCart(null));
var accountService = new MockAccountService();
accountService.GetSignedInUserAsyncDelegate = () => Task.FromResult((UserInfo)null);
var target = new ShoppingCartTabUserControlViewModel(shoppingCartRepository, eventAggregator, navigationService, new AlertMessageService(), null, accountService);
target.ShoppingCartTabCommand.Execute();
Assert.IsTrue(navigateCalled);
}
public void FailedCallToShoppingCartRepository_ShowsAlert()
{
var alertCalled = false;
var shoppingCartRepository = new MockShoppingCartRepository();
shoppingCartRepository.GetShoppingCartAsyncDelegate = () =>
{
throw new HttpRequestException();
};
var alertMessageService = new MockAlertMessageService();
alertMessageService.ShowAsyncDelegate = (s, s1) =>
{
alertCalled = true;
Assert.AreEqual("Error", s1);
return Task.FromResult(string.Empty);
};
var accountService = new MockAccountService();
accountService.GetSignedInUserAsyncDelegate = () => Task.FromResult((UserInfo)null);
var target = new ShoppingCartTabUserControlViewModel(shoppingCartRepository, null, null,
alertMessageService, new MockResourceLoader(), accountService);
Assert.IsTrue(alertCalled);
}
public void ShoppingCartUpdated_WithNullCart_SetsItemCountZero()
{
var shoppingCartRepository = new MockShoppingCartRepository();
shoppingCartRepository.GetShoppingCartAsyncDelegate = () => Task.FromResult<ShoppingCart>(null);
var eventAggregator = new MockEventAggregator();
var shoppingCartUpdatedEvent = new ShoppingCartUpdatedEvent();
eventAggregator.GetEventDelegate = type =>
{
if (type == typeof(ShoppingCartUpdatedEvent)) return shoppingCartUpdatedEvent;
if (type == typeof(ShoppingCartItemUpdatedEvent)) return new ShoppingCartItemUpdatedEvent();
return null;
};
var accountService = new MockAccountService();
accountService.GetSignedInUserAsyncDelegate = () => Task.FromResult((UserInfo)null);
var target = new ShoppingCartTabUserControlViewModel(shoppingCartRepository, eventAggregator, null, new AlertMessageService(), null, accountService);
target.ItemCount = 99;
shoppingCartUpdatedEvent.Publish(null);
Assert.AreEqual(0, target.ItemCount);
}
