public void Now_something_a_bit_more_advanced()
{
var convert = new ExpressionConverter();
var fieldService = new FieldService();
convert.MapToArray("fieldService.GetField", "felter");
Expression<Func<Field>> bodyExpr = () => fieldService.GetField(123);
string javascript = convert.Convert(bodyExpr);
File.WriteAllText(@"c:\temp\Now_something_a_bit_more_advanced.js", string.Format("var foo = {0};", javascript));
Assert.IsNotNull(javascript);
}