public void TestEvaluation()
        {
            object evaluated = mExpressionParser.EvaluateExpression("3.1f", new CodeContext(null));

            if ((evaluated is float) == false)
            {
                throw new Exception("Values with 'f' should be floats");
            }

            TestEvaluation("-16", -16);

            TestEvaluation("1+1", 2);

            TestEvaluation("2.3f - 1", 2.3f - 1);

            TestEvaluation("1 + (2 * 3.0)", 1 + (2 * 3.0));

            TestEvaluation("4/2.0f", 4 / 2.0f);

            TestEvaluation("true || false", true || false);
            TestEvaluation("true && false", true && false);



            // Test full evaluations and verify the results
            TestEvaluation("System.Math.Max(3, 5)", 5);
            TestEvaluation("System.Math.Min(8-1, 8)", 7);

            TestEvaluation("this", mElementRuntime, mElementRuntime);

            TestEvaluation("this.X", mElementRuntime.X, mElementRuntime);

            TestEvaluation("this.SomeNewVar", 3.333, mElementRuntime);

            TestEvaluation("System.Math.Max(this.X, this.Y)", System.Math.Max(mElementRuntime.X, mElementRuntime.Y), mElementRuntime);

            TestEvaluation("float.PositiveInfinity", float.PositiveInfinity);

            TestEvaluation("System.Math.Max(float.PositiveInfinity, 0)", float.PositiveInfinity);
            TestEvaluation("VariableState.Left", mElementRuntime.GetStateRecursively("Left"), mElementRuntime);

            TestEvaluation("new Vector3()", new Vector3());

            TestEvaluation("Color.Red", Color.Red);
            // need this, but first need to be able to reorder cast properly
            TestEvaluation("new Color(.3f, .4f, .5f, .6f)", new Color(.3f, .4f, .5f, .6f));

            TestEvaluation("\"a\" + \"b\"", "ab", null);
            TestEvaluation("1 + \"a\" + 2", "1a2", null);

            TestEvaluation("this.SpriteObject.ScaleX", 3.0f, mElementRuntime);

            EmitterList emitterList = new EmitterList();
            var         first       = new Emitter();

            first.Name = "First";
            emitterList.Add(first);

            var second = new Emitter();

            second.Name = "Second";
            emitterList.Add(second);

            TestEvaluation("FindByName(\"First\")", emitterList.FindByName("First"), emitterList);
        }