public void TestConstructor_EnumerableWordNodesEmpty() {
var words = new WordNode[] {};
PhraseNode pn = new PhraseNode(words, Location.Name, true);
Assert.AreEqual(words.Length, pn.Size());
for(int i = 0; i < pn.Size(); i++) {
Assert.AreEqual(words[i], pn[i]);
}
Assert.AreEqual(Location.Name, pn.Location);
}