public void TestCreateThemeFromPhrases_SecondNull() {
MethodDeclarationNode mdn = new MethodDeclarationNode("MyMethod");
PhraseNode pn2 = new PhraseNode(new string[] { "cowboy", "watermelon" });
mdn.CreateThemeFromPhrases(null, pn2);
Assert.AreSame(pn2, mdn.Theme);
Assert.AreEqual(2, pn2.Size());
Assert.AreEqual("cowboy", pn2[0].Text);
Assert.AreEqual("watermelon", pn2[1].Text);
}