public void Constructor_ValidInput_DetailsCorrect()
{
// Fixture setup
var expectedTitle = "News title";
var expectedText = "News text";
Uri expectedImageSource = null;
var expectedPublicationDate = DateTimeOffset.Now;
var channelName = "News channel";
var expectedPublicationDetails = expectedPublicationDate.ToString("dd.MM.yyy - HH:mm") + " • " + channelName;
var newsChannel = new NewsChannel(channelName, new Uri("http://news.com/rss"));
var newsItem = new NewsItem(expectedTitle, expectedText, expectedPublicationDate, expectedImageSource);
// Exercise system
var viewModel = new NewsDetailsViewModel(newsChannel, newsItem);
// Verify outcome
Assert.AreEqual(viewModel.Title, expectedTitle);
Assert.AreEqual(viewModel.Text, expectedText);
Assert.AreEqual(viewModel.PublicationDate, expectedPublicationDate);
Assert.AreEqual(viewModel.ImageSource, expectedImageSource);
Assert.AreEqual(viewModel.PublicationDetails, expectedPublicationDetails);
// Teardown
}
public void Constructor_NullNewsChannel_ExceptionThrown()
{
// Fixture setup
NewsChannel newsChannel = null;
var newsItem = new NewsItem("News title", "News text", DateTimeOffset.Now, null);
// Exercise system
// Verify outcome
Assert.ThrowsException<ArgumentNullException>
(() => new NewsDetailsViewModel(newsChannel, newsItem));
// Teardown
}
public async Task GetLatestNewsAsync_MockForTwoNewsChannels_ValidNewsItemsSortingOrder()
{
// Fixture setup
var firstItem = new NewsItem("First item", "News text", DateTimeOffset.Now, null);
var secondItem = new NewsItem("Second item", "News text", firstItem.PublicationDate.AddSeconds(1), null);
var requestCounter = 0;
Func<string, NewsFeed> parsingFunc = rss =>
{
requestCounter++;
if (requestCounter == 1) return new NewsFeed(new[] { firstItem });
return new NewsFeed(new[] { secondItem });
};
IHttpClient httpClient = new HttpClientMock();
IRssParser rssParser = new RssParserMock { CustomParsingFunction = parsingFunc };
IProgressIndicator progressIndicator = new ProgressIndicatorMock();
var viewModel = new NewsFeedViewModel(httpClient, rssParser, progressIndicator);
var newsChannel = new NewsChannel("News channel", new Uri("http://news.com/rss"));
var expectedFirstItemTitle = secondItem.Title;
// Exercise system
await viewModel.GetLatestNewsAsync(newsChannel, newsChannel);
// Verify outcome
Assert.AreEqual(viewModel.News[0].Title, expectedFirstItemTitle);
// Teardown
}
public async Task GetLatestNewsAsync_MockForTwoNewsChannels_ValidItemCount()
{
// Fixture setup
var newsItem = new NewsItem("News item", "News text", DateTimeOffset.Now, null);
Func<string, NewsFeed> parsingFunc = rss => new NewsFeed(new[] { newsItem });
IHttpClient httpClient = new HttpClientMock();
IRssParser rssParser = new RssParserMock { CustomParsingFunction = parsingFunc };
IProgressIndicator progressIndicator = new ProgressIndicatorMock();
var viewModel = new NewsFeedViewModel(httpClient, rssParser, progressIndicator);
var newsChannel = new NewsChannel("News channel", new Uri("http://news.com/rss"));
var expectedNewsCount = 2;
// Exercise system
await viewModel.GetLatestNewsAsync(newsChannel, newsChannel);
// Verify outcome
Assert.AreEqual(viewModel.News.Count, expectedNewsCount);
// Teardown
}