AjErl.Tests.Expressions.ListExpressionTests.RaiseWhenUnboundVariable C# (CSharp) Method

        public void RaiseWhenUnboundVariable()
        {
            Context context = new Context();
            var expr = new ListExpression(new IExpression[] { new ConstantExpression(1), new VariableExpression(new Variable("X")), new AtomExpression(new Atom("y")) });

            Assert.IsTrue(expr.HasVariable());

            try
            {
                expr.Evaluate(context, false);
                Assert.Fail();
            }
            catch (Exception ex)
            {
                Assert.AreEqual("variable 'X' is unbound", ex.Message);
            }
        }