public void AddingItemMessageHandler_WhenInvoked_CallsRepositorySaveWithNewItem()
{
// Arrange
var repository = Substitute.For<INewspaperAdRepository>();
var message = new AddingNewspaperItemMessage();
var collectionViewModel = new NewspaperCollectionViewModel(repository);
collectionViewModel.Newspapers.Count.Should().Be(0, "There are no items in the collection initially.");
// Act
Messenger.Default.Send(message);
// Assert
repository.Received().Save(collectionViewModel.Newspapers.First().Model);
}
public void AddingItemMessageHandler_WhenInvoked_AddsNewItemToNewspapersCollection()
{
// Arrange
var repository = Substitute.For<INewspaperAdRepository>();
var message = new AddingNewspaperItemMessage();
var collectionViewModel = new NewspaperCollectionViewModel(repository);
collectionViewModel.Newspapers.Count.Should().Be(0, "There are no items in the collection initially.");
// Act
Messenger.Default.Send(message);
// Assert
collectionViewModel.Newspapers.Count.Should().Be(1, "A new item should have been added to the collection.");
collectionViewModel.Newspapers.First().Name.Should().Be(Newspaper.MSG_NEW_NEWSPAPER_NAME,
"The new item should be a new Newspaper.");
}
public void AddingItemMessageHandler_WhenInvoked_SendsCurrentItemChangedMessage()
{
// Arrange
var repository = GetNewspaperRepository();
var message = new AddingNewspaperItemMessage();
var collectionViewModel = new NewspaperCollectionViewModel(repository);
var changedMessageReceived = false;
NewspaperItemViewModel receivedItemViewModel = null;
collectionViewModel.Newspapers.Count.Should().Be(0, "There are no items in the collection initially.");
Messenger.Default.Register<CurrentNewspaperItemChangedMessage>(this, msg =>
{
changedMessageReceived = true;
receivedItemViewModel = msg.ItemViewModel;
});
// Act
Messenger.Default.Send(message);
// Assert
changedMessageReceived.Should().Be(true, "The message was sent from the NewspaperCollectionsViewModel.");
receivedItemViewModel.Should().Be(collectionViewModel.Newspapers.First(),
"The item received in the message matches the CurrentItem in the collection.");
}
private void AddingNewspaperItemMessageHandler(AddingNewspaperItemMessage message)
{
var model = new Newspaper();
var vm = new NewspaperItemViewModel(_adRepository) {Model = model};
Newspapers.Add(vm);
var sortedNewspapers = Newspapers.OrderBy(n => n.Name).ToList();
Newspapers.Clear();
sortedNewspapers.ForEach(Newspapers.Add);
Messenger.Default.Send(new CurrentNewspaperItemChangedMessage(vm));
}
