test_get_printer_paper_sizes.html

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<!DOCTYPE HTML>

<html>

<head>

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

</head>

<body onload="run()">

<script type="application/javascript">

SimpleTest.waitForExplicitFinish();

async function run() {

  try {

    let printerList = Cc["@mozilla.org/gfx/printerlist;1"].getService(

      Ci.nsIPrinterList

);

    let printers = await printerList.printers;

    if (printers.length == 0) {

      ok(true, "There were no printers to iterate through.");

    for (let printer of printers) {

      printer.QueryInterface(Ci.nsIPrinter);

      is(typeof(printer.name), 'string', "Printer name should be a string.");

      isnot(printer.name, "", "Printer name should never be empty.");

      info(printer.name);

      info("duplex(" + printer.supportsDuplex + ")");

      let printerInfo = await printer.printerInfo;

      for (let paper of printerInfo.paperList) {

        paper.QueryInterface(Ci.nsIPaper);

        info(`${paper.name}: ${paper.width}x${paper.height}`);

        is(typeof(paper.name), 'string', "Paper name should be a string.");

        isnot(paper.name, "", "Paper name should never be empty.");

        is(typeof(paper.width), 'number', "Paper width should be a number.");

        ok(paper.width > 0.0, "Paper width should be greater than zero.");

        is(typeof(paper.height), 'number', "Paper height should be a number.");

        ok(paper.height > 0.0, "Paper height should be greater than zero.");

        let margin = await paper.unwriteableMargin;

        margin.QueryInterface(Ci.nsIPaperMargin);

        info(`with margin: ${margin.top} ${margin.right} ${margin.bottom} ${margin.left}`);

        is(typeof(margin.top),    'number', "Paper unwriteable margin top should be a number.");

        is(typeof(margin.right),  'number', "Paper unwriteable margin right should be a number.");

        is(typeof(margin.bottom), 'number', "Paper unwriteable margin bottom should be a number.");

        is(typeof(margin.left),   'number', "Paper unwriteable margin left should be a number.");

        ok(margin.top    >= 0.0, "Paper unwriteable margin top should be greater than or equal to zero.");

        ok(margin.right  >= 0.0, "Paper unwriteable margin right should be greater than or equal to zero.");

        ok(margin.bottom >= 0.0, "Paper unwriteable bottom right should be greater than or equal to zero.");

        ok(margin.left   >= 0.0, "Paper unwriteable margin left should be greater than or equal to zero.");

  } catch (e) {

    ok(false, `Shouldn't throw: ${e}`);

    console.error(e);

  SimpleTest.finish();

</script>

</body>

</html>