expected <- eval(parse(text="FALSE"));    
test(id=0, code={    
argv <- eval(parse(text="list(structure(list(`character(0)` = structure(integer(0), .Label = character(0), class = \"factor\")), .Names = \"character(0)\", row.names = character(0), class = \"data.frame\"))"));    
do.call(`is.raw`, argv);    
}, o=expected);    

