public void CalcWordsShouldProvideValidWordsFrequency()
{
var words = new[] { "This", "is", "a", "statement", "and", "so", "is", "this" };
var fakeService = A.Fake<ISentenceAnalyzerService>();
A.CallTo(() => fakeService.SplitIntoWords(A<string>._)).Returns(words);
var viewModel = new WordsFrequencyViewModel(fakeService);
const string sentence = "Doesn't matter";
viewModel.Sentence = sentence;
viewModel.CalculateWordsCommand.Execute();
A.CallTo(() => fakeService.SplitIntoWords(A<string>.That.IsEqualTo(sentence))).MustHaveHappened();
var expected = new[]
{
new WordCount("this", 2),
new WordCount("is", 2),
new WordCount("a", 1),
new WordCount("statement", 1),
new WordCount("and", 1),
new WordCount("so", 1)
};
var comparer = Comparer<WordCount>.Create((x, y) => x.Word.CompareTo(y.Word) * 10 + x.Count.CompareTo(y.Count));
CollectionAssert.AreEqual(expected, viewModel.WordsCount.ToList(), comparer);
}
public void CalcWordsCommandShouldBeDisabledIfSentenceIsEmpty()
{
var viewModel = new WordsFrequencyViewModel(A.Fake<ISentenceAnalyzerService>());
Assert.IsFalse(viewModel.CalculateWordsCommand.CanExecute());
var canExecuteChanged = A.Fake<EventHandler>();
viewModel.CalculateWordsCommand.CanExecuteChanged += canExecuteChanged;
viewModel.Sentence = "Some sentence";
Assert.IsTrue(viewModel.CalculateWordsCommand.CanExecute(), "Command should be enabled if a sentence is provided");
A.CallTo(() => canExecuteChanged(A<object>._, A<EventArgs>._)).MustHaveHappened();
viewModel.Sentence = String.Empty;
Assert.IsFalse(viewModel.CalculateWordsCommand.CanExecute(), "Command should be enabled if a sentence is provided");
A.CallTo(() => canExecuteChanged(A<object>._, A<EventArgs>._)).MustHaveHappened(Repeated.Exactly.Twice);
}
public void WordsCountResultShouldBeSorted()
{
var words = new[] { "last", "middle", "middle", "median", "median", "top", "top", "top" };
var fakeService = A.Fake<ISentenceAnalyzerService>();
A.CallTo(() => fakeService.SplitIntoWords(A<string>._)).Returns(words);
var viewModel = new WordsFrequencyViewModel(fakeService);
const string sentence = "Doesn't matter";
viewModel.Sentence = sentence;
viewModel.CalculateWordsCommand.Execute();
var expected = new[]
{
new WordCount("top", 3),
new WordCount("middle", 2),
new WordCount("median", 2),
new WordCount("last", 1)
};
var comparer = Comparer<WordCount>.Create((x, y) => x.Word.CompareTo(y.Word) * 10 + x.Count.CompareTo(y.Count));
CollectionAssert.AreEqual(expected, viewModel.WordsCount.ToList(), comparer);
}
public void ConstructorShouldThrowArgumentNullException()
{
var viewModel = new WordsFrequencyViewModel(null);
}