test_fileReadSlice.xhtml

Enable keyboard shortcuts

<?xml version="1.0"?>

<?xml-stylesheet type="text/css" href="chrome://global/skin"?>

<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=664783

-->

<window title="Mozilla Bug 664783"

        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

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

  <script type="application/javascript" src="dom_worker_helper.js"/>

  <!-- test results are displayed in the html:body -->

  <body xmlns="http://www.w3.org/1999/xhtml">

  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=664783"

     target="_blank">Mozilla Bug 664783</a>

  <div id="content" style="display: none">

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

  </div>

  </body>

  <!-- test code goes here -->

  <script type="application/javascript">

  <![CDATA[

  if (navigator.platform.startsWith("Win")) {

    SimpleTest.expectAssertions(0, 1);

  /** Test for Bug 664783 **/

  var fileNum = 0;

/**

   * Create a file which contains the given data.

*/

  function createFileWithData(fileData) {

    var testFile = Cc["@mozilla.org/file/directory_service;1"]

                       .getService(Ci.nsIProperties)

                       .get("ProfD", Ci.nsIFile);

    testFile.append("workerReadSlice" + fileNum++);

    var outStream = Cc["@mozilla.org/network/file-output-stream;1"]

                        .createInstance(Ci.nsIFileOutputStream);

    outStream.init(testFile, 0x02 | 0x08 | 0x20, // write, create, truncate

                   0o666, 0);

    outStream.write(fileData, fileData.length);

    outStream.close();

    var fileList = document.getElementById('fileList');

    fileList.value = testFile.path;

    return fileList.files[0];

/**

   * Creates a worker which slices a blob to the given start and end offset and

   * reads the content as text.

*/

  function readSlice(blob, start, end, expectedText) {

    var worker = new Worker("fileReadSlice_worker.js");

    worker.onerror = function(event) {

      ok(false, "Worker had an error: " + event.message);

      finish();

};

    worker.onmessage = function(event) {

      is(event.data, expectedText, "Text from sliced blob in worker is incorrect.");

      finish();

};

    var params = {blob, start, end};

    worker.postMessage(params);

    waitForWorkerFinish();

  // Empty file.

  readSlice(createFileWithData(""), 0, 0, "");

  // Typical use case.

  readSlice(createFileWithData("HelloBye"), 5, 8, "Bye");

  // End offset too large.

  readSlice(createFileWithData("HelloBye"), 5, 9, "Bye");

  // Start of file.

  readSlice(createFileWithData("HelloBye"), 0, 5, "Hello");

]]>

  </script>

</window>