public void TypeAsTest()
        {
            LinqToSparqlExpTranslator<Track> target = new LinqToSparqlExpTranslator<Track>();
            target.TypeTranslator = new XsdtTypeConverter();

            Expression e = Expression.TypeAs(Expression.Constant("3.14"), typeof (double));
            target.StringBuilder = new StringBuilder();
            target.TypeAs(e);
        }