public void TestVariables()
{
Evaluator e = new Evaluator();
e.SetVariable("daughter1", "Vivian");
Assert.AreEqual("Vivian", e.GetVariable("daughter1").As<string>());
e.Evaluate("let daughter2 = \"Lillian\"");
Assert.AreEqual("Lillian", e.GetVariable("daughter2").As<string>());
e.Evaluate("let daughter1 = daughter2");
Assert.AreEqual("Lillian", e.GetVariable("daughter1").As<string>());
e.Evaluate("let boingBoing = 1");
Assert.AreEqual(1, e.Evaluate("boingBoing").As<int>());
e.Evaluate("unlet boingBoing"); // god forbid!
Assert.IsFalse(e.HasVariable("boingBoing"));
}