AjErl.Expressions.CallExpression.HasVariable C# (CSharp) Method

        public bool HasVariable()
        {
            if (this.nameexpression.HasVariable())
                return true;

            foreach (var expr in this.argumentexpressions)
                if (expr.HasVariable())
                    return true;

            return false;
        }

        public void EvaluateCallExpression()
        {
            Context context = new Context();
            Function function = new Function(context, new object[] { new Variable("X"), new Variable("Y") }, new AddExpression(new VariableExpression(new Variable("X")), new VariableExpression(new Variable("Y"))));
            context.SetValue("add/2", function);
            CallExpression expr = new CallExpression(new AtomExpression(new Atom("add")), new IExpression[] { new ConstantExpression(1), new ConstantExpression(2) });

            Assert.IsFalse(expr.HasVariable());
            Assert.IsNotNull(expr.NameExpression);
            Assert.IsInstanceOfType(expr.NameExpression, typeof(AtomExpression));
            Assert.IsNotNull(expr.ArgumentExpressions);
            Assert.AreEqual(2, expr.ArgumentExpressions.Count);

            Assert.AreEqual(3, expr.Evaluate(context));
        }