selfTest method
The self-test in the printer's language (a small real PDF for a document printer).
Implementation
Future<PrintResult> selfTest(TargetPrinter printer) async {
if (!printer.rasterizes) {
return _run(printer, '', sp.PrintJob(type: sp.JobTypes.pdf, data: await sp.SPrint.testPagePdf()));
}
return _run(printer, '', const sp.PrintJob(type: sp.JobTypes.test));
}