test_bug1319088.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Test for bug 1319088</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<input id="input" type="file"></input>

<script type="application/javascript">

function testSetup() {

  SpecialPowers.pushPrefEnv({"set": [["dom.webkitBlink.dirPicker.enabled", true]]}, next);

function populateInputFile() {

  var url = SimpleTest.getTestFileURL("script_fileList.js");

  var script = SpecialPowers.loadChromeScript(url);

  function onOpened(message) {

    var input = document.getElementById("input");

    SpecialPowers.wrap(input).mozSetFileArray([message.file]);

    script.destroy();

    next();

  script.addMessageListener("file.opened", onOpened);

  script.sendAsyncMessage("file.open");

function checkBug() {

  var input = document.getElementById("input");

  is(input.files[0].webkitRelativePath, "", "No relative path!");

  let form = document.createElement("form");

  form.appendChild(input);

  is(input.files[0].webkitRelativePath, "", "No relative path!");

  SimpleTest.finish();

var tests = [

  testSetup,

  populateInputFile,

  checkBug,

];

function next() {

  if (!tests.length) {

    SimpleTest.finish();

    return;

  var test = tests.shift();

  test();

SimpleTest.waitForExplicitFinish();

next();

</script>

</body>

</html>