public void TestPredefinedFunctions()
{
var node = Parser.Parse(new Lexer(new StringReader("lower(a) < 'a'"), "{test}"));
var result = SetToString(FreeVars.Get(node, new Interpreter().GetBaseEnvironment()));
Assert.AreEqual("{a}", result);
}
private void Verify(string free, string script)
{
var node = Parser.Parse(new Lexer(new StringReader(script), "{test}"));
var freeVars = new SortedSet <string>();
var boundVars = new SortedSet <string>();
var additionalBoundVars = new SortedSet <string>();
node.CollectVars(freeVars, boundVars, additionalBoundVars);
Assert.AreEqual(free, SetToString(FreeVars.Get(node, Environment.GetBaseEnvironment())));
}
public void TestFreeVars()
{
var interpreter = new Interpreter();
var env = Environment.GetBaseEnvironment();
var parseTree1 = Parser.Parse(new Lexer(new StringReader("def say_hello = fn(obj) \"Hello \" + obj;"), "{test}"));
interpreter.Interpret(parseTree1, env);
var parseTree2 = Parser.Parse(new Lexer(new StringReader("say_hello(\"du\") + unknown_func()"), "{test}"));
var freeVars = FreeVars.Get(parseTree2, env);
Assert.IsTrue(freeVars.Contains("unknown_func"));
Assert.IsFalse(freeVars.Contains("say_hello"));
}