public async Task ReturnDifferentResults_ForMultipleSearchMethodCall()
{
// Arrange
InitializeServices(Configure);
var viewModel = new ChuckNorrisSearchPageViewModel();
// Act
viewModel.SearchTerm = "dog";
var firstQuotes = await viewModel.Quotes.Load(DefaultCancellationToken);
viewModel.SearchTerm = "cat";
var secondQuotes = await viewModel.Quotes.Load(DefaultCancellationToken);
// Assert
using (new AssertionScope())
{
firstQuotes.Length
.Should().Be(3);
secondQuotes.Length
.Should().Be(1);
}
void Configure(IHostBuilder host)
{
host.ConfigureServices(services =>
{
// This will replace the actual implementation of IApplicationSettingsService with a mocked version.
ReplaceWithMock <IChuckNorrisService>(services, mock =>
{
mock
.Setup(m => m.Search(It.IsAny <CancellationToken>(), "dog"))
.ReturnsAsync(new ChuckNorrisQuote[]
{
new ChuckNorrisQuote(new ChuckNorrisData.Builder().WithId("1"), false),
new ChuckNorrisQuote(new ChuckNorrisData.Builder().WithId("3"), false),
new ChuckNorrisQuote(new ChuckNorrisData.Builder().WithId("1204"), false)
});
mock
.Setup(m => m.Search(It.IsAny <CancellationToken>(), "cat"))
.ReturnsAsync(new ChuckNorrisQuote[]
{
new ChuckNorrisQuote(new ChuckNorrisData.Builder().WithId("1"), false)
});
MockingGetFavorites(mock);
});
});
}
}
public async Task ReturnEmptyCriterion_WhenProvidedSearchTermIsTooShort(string searchTerm)
{
// Arrange
var viewModel = new ChuckNorrisSearchPageViewModel();
InitializeServices(ChuckNorrisSearchPageViewModelShould_Configuration);
// Act
viewModel.SearchTerm = searchTerm;
var quotes = await viewModel.Quotes.Load(DefaultCancellationToken);
// Assert
quotes.Should().BeEmpty();
}
public async Task ReturnFavourited()
{
// Arrange
var mockChuckNorrisService = new Mock <IChuckNorrisService>();
var searchViewModel = new ChuckNorrisSearchPageViewModel();
searchViewModel.SearchTerm = "dog";
var searchedQuotes = await searchViewModel.Quotes.Load(DefaultCancellationToken);
var firstQuoteVm = searchedQuotes.First();
// Act
await searchViewModel.ToggleIsFavorite.Execute(firstQuoteVm);
await NavigateAndClear(DefaultCancellationToken, () => new ChuckNorrisFavoritesPageViewModel());
var favouritesViewModel = (ChuckNorrisFavoritesPageViewModel)GetCurrentViewModel();
var favouritedQuotes = await favouritesViewModel.Quotes.Load(DefaultCancellationToken) as ReadOnlyObservableCollection <ChuckNorrisItemViewModel>;
// ReadOnlyObservableCollection does not load its content directly. Waiting for the CollectionChanged is a workaround to wait for its content to be loaded.
var tcs = new TaskCompletionSource <Unit>();
// CollectionChanged is private for ReadOnlyObservableCollection, therefore casting it into INotifyCollectionChanged is a workaround to be able to access this event
// https://stackoverflow.com/questions/2058176/why-is-readonlyobservablecollection-collectionchanged-not-public
((INotifyCollectionChanged)favouritedQuotes).CollectionChanged += OnFavouriteCollectionChanged;
await tcs.Task;
((INotifyCollectionChanged)favouritedQuotes).CollectionChanged -= OnFavouriteCollectionChanged;
// Assert
favouritedQuotes.Should().NotBeNull();
var results = favouritedQuotes
.Select(vm => vm.Quote);
results.Should().Contain(firstQuoteVm.Quote);
void OnFavouriteCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
try
{
tcs.TrySetResult(Unit.Default);
}
catch (Exception ex)
{
tcs.TrySetException(ex);
}
}
}
public async Task CheckForSearchMethod_WhenQuotesAreLoading()
{
// Arrange
InitializeServices(Configure);
var viewModel = new ChuckNorrisSearchPageViewModel();
// Act
viewModel.SearchTerm = "dog";
var quotes = await viewModel.Quotes.Load(DefaultCancellationToken);
// Assert
using (new AssertionScope())
{
quotes.Should()
.NotBeNull()
.And
.NotBeEmpty();
quotes.All(q => q.Quote.Value.ToUpperInvariant().Contains("DOG"))
.Should().BeTrue("All quotes found searching for search term 'dog' should contain 'dog' ");
}
void Configure(IHostBuilder host)
{
host.ConfigureServices(services =>
{
// This will replace the actual implementation of IApplicationSettingsService with a mocked version.
ReplaceWithMock <IChuckNorrisService>(services, mock =>
{
mock
.Setup(m => m.Search(It.IsAny <CancellationToken>(), It.IsAny <string>()))
.ReturnsAsync(new ChuckNorrisQuote[]
{
new ChuckNorrisQuote(new ChuckNorrisData.Builder().WithId("0").WithValue("Something something dog"), false),
new ChuckNorrisQuote(new ChuckNorrisData.Builder().WithId("1203").WithValue("Dog something"), false)
});
MockingGetFavorites(mock);
});
});
}
}
