public void RemovingItemMessageHandler_WhenInvoked_RemovesItemFromNewspapersCollection()
{
// Arrange
var repository = GetNewspaperRepository();
var model1 = new Newspaper {Name = "Paper 1"};
var model2 = new Newspaper {Name = "Paper 2"};
var model3 = new Newspaper {Name = "Paper 3"};
var paperItemVm1 = new NewspaperItemViewModel(repository) {Model = model1};
var paperItemVm2 = new NewspaperItemViewModel(repository) {Model = model2};
var paperItemVm3 = new NewspaperItemViewModel(repository) {Model = model3};
var collectionViewModel = new NewspaperCollectionViewModel(repository);
collectionViewModel.Newspapers.Add(paperItemVm1);
collectionViewModel.Newspapers.Add(paperItemVm2);
collectionViewModel.Newspapers.Add(paperItemVm3);
collectionViewModel.CurrentItem.Should().Be(paperItemVm3, "CurrentItem should be the last item added.");
collectionViewModel.Newspapers.Count.Should().Be(3, "There are now three items in the list.");
var message = new RemovingNewspaperItemMessage(paperItemVm2);
// Act
Messenger.Default.Send<RemovingNewspaperItemMessage>(message);
// Assert
collectionViewModel.Newspapers.Count.Should().Be(2, "An item should have been removed from the collection.");
collectionViewModel.Newspapers.ShouldBeEquivalentTo(new List<NewspaperItemViewModel>() {paperItemVm1, paperItemVm3},
"Item paperItemVm2 was removed, leaving paperItemVm1 and paperItemVm3 in the list.");
}
public void RemovingItemMessageHandler_WhenInvoked_SendsCurrentItemChangedMessage()
{
// Arrange
var itemChangedMessageReceived = false;
NewspaperItemViewModel changedItemViewModel = null;
var repository = GetNewspaperRepository();
var model1 = new Newspaper {Name = "Paper 1"};
var model2 = new Newspaper {Name = "Paper 2"};
var model3 = new Newspaper {Name = "Paper 3"};
var paperItemVm1 = new NewspaperItemViewModel(repository) {Model = model1};
var paperItemVm2 = new NewspaperItemViewModel(repository) {Model = model2};
var paperItemVm3 = new NewspaperItemViewModel(repository) {Model = model3};
var collectionViewModel = new NewspaperCollectionViewModel(repository);
collectionViewModel.Newspapers.Add(paperItemVm1);
collectionViewModel.Newspapers.Add(paperItemVm2);
collectionViewModel.Newspapers.Add(paperItemVm3);
collectionViewModel.CurrentItem.Should().Be(paperItemVm3, "CurrentItem should be the last item added.");
collectionViewModel.Newspapers.Count.Should().Be(3, "There are now three items in the list.");
var message = new RemovingNewspaperItemMessage(paperItemVm2);
Messenger.Default.Register<CurrentNewspaperItemChangedMessage>(this, (msg) =>
{
itemChangedMessageReceived = true;
changedItemViewModel = msg.ItemViewModel;
});
// Act
Messenger.Default.Send<RemovingNewspaperItemMessage>(message);
// Assert
itemChangedMessageReceived.Should().Be(true, "The message was received from the collection view model.");
changedItemViewModel.Should().Be(collectionViewModel.CurrentItem,
"The item sent is the current item from the collection view model.");
}
public void RemovingItemMessageHandler_WhenInvoked_CallsRepositoryDeleteWithDeletedItem()
{
// Arrange
var repository = GetNewspaperRepository();
var model1 = new Newspaper {Name = "Paper 1"};
var model2 = new Newspaper {Name = "Paper 2"};
var model3 = new Newspaper {Name = "Paper 3"};
var paperItemVm1 = new NewspaperItemViewModel(repository) {Model = model1};
var paperItemVm2 = new NewspaperItemViewModel(repository) {Model = model2};
var paperItemVm3 = new NewspaperItemViewModel(repository) {Model = model3};
var collectionViewModel = new NewspaperCollectionViewModel(repository);
collectionViewModel.Newspapers.Add(paperItemVm1);
collectionViewModel.Newspapers.Add(paperItemVm2);
collectionViewModel.Newspapers.Add(paperItemVm3);
collectionViewModel.CurrentItem.Should().Be(paperItemVm3, "CurrentItem should be the last item added.");
collectionViewModel.Newspapers.Count.Should().Be(3, "There are now three items in the list.");
var message = new RemovingNewspaperItemMessage(paperItemVm2);
// Act
Messenger.Default.Send<RemovingNewspaperItemMessage>(message);
// Assert
repository.Received().Save(model2);
}
