Copy to clipboard including quotationmarks

Hi,

I wish to copy a string to the clipboard including the quotation marks. The following command on OSX is one way to do that.

 echo \"test\" | pbcopy

But when I use system.callSystem(...) the quotation marks are skipped. Is there a way to include them?

var ctrl_string = "\"test\"";
system.callSystem("echo " +  ctrl_string + " | pbcopy");

Thanks,

Johan