public void Parse_EmptyInput_ReturnsEmptyDictionary()
{
// arrange
// act
Dictionary <(string, string), string> result = TrigramParser.Parse("");
// assert
Assert.IsNotNull(result);
Assert.IsEmpty(result);
}
public void Parse_3WordsSentence_ReturnsDictionaryWithSingleEntry()
{
// arrange
// act
Dictionary <(string, string), string> result = TrigramParser.Parse("dummyA dummyB dummyC");
// assert
Assert.AreEqual(1, result.Count);
Assert.AreEqual(("dummyA", "dummyB"), result.ElementAt(0).Key);
Assert.AreEqual("dummyC", result.ElementAt(0).Value);
}
public void Parse_SentenceWithMultipleWords_ReturnsDictionaryWithTrigram()
{
// arrange
string text = "dummyA dummyB dummyC dummyD dummyE";
// act
Dictionary <(string, string), string> result = TrigramParser.Parse(text);
// assert
Assert.AreEqual(3, result.Count);
Assert.AreEqual(("dummyA", "dummyB"), result.ElementAt(0).Key);
Assert.AreEqual("dummyC", result.ElementAt(0).Value);
Assert.AreEqual(("dummyB", "dummyC"), result.ElementAt(1).Key);
Assert.AreEqual("dummyD", result.ElementAt(1).Value);
Assert.AreEqual(("dummyC", "dummyD"), result.ElementAt(2).Key);
Assert.AreEqual("dummyE", result.ElementAt(2).Value);
}