public void GetNextWord()
{
WordTargetLayout layout = new WordTargetLayout(new List <string> {
"VARIABLE", "VALUE", "VAGUE", "UNCLEAR", "STATE"
});
Assert.AreEqual("VALUE", layout.GetNextWord("VARIABLE"));
Assert.AreEqual("VAGUE", layout.GetNextWord("VALUE"));
Assert.AreEqual(null, layout.GetNextWord("STATE"));
Assert.ThrowsException <System.Exception>(() => layout.GetNextWord("NOTTHERE"));
}