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<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=938023
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  <title>Test for Bug 938023 Downloads API</title>
  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=938023">Mozilla Bug 938023</a>
<p id="display"></p>
<div id="content" style="display: none">
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<a href="serve_file.sjs?contentType=application/octet-stream&size=1024" download="test.bin" id="download1">Download #1</a>
<pre id="test">
<script class="testbody" type="text/javascript;version=1.7">

// Testing a simple download, waiting for it to be done.

SimpleTest.waitForExplicitFinish();

var index = -1;
var todayDate = new Date();
var baseServeURL = "http://mochi.test:8888/tests/dom/downloads/tests/";
var lastKnownCurrentBytes = 0;

function next() {
  index += 1;
  if (index >= steps.length) {
    ok(false, "Shouldn't get here!");
    return;
  }
  try {
    steps[index]();
  } catch(ex) {
    ok(false, "Caught exception", ex);
  }
}

function checkConsistentDownloadAttributes(download) {
  var href = document.getElementById("download1").getAttribute("href");
  var expectedServeURL = baseServeURL + href;
  var destinationRegEx = /test\(?[0-9]*\)?\.bin$/;

  // bug 945323: Download path isn't honoring download attribute
  ok(destinationRegEx.test(download.path),
     "Download path '" + download.path +
     "' should match '" + destinationRegEx + "' regexp.");

  ok(download.startTime >= todayDate,
     "Download start time should be greater than or equal to today");

  is(download.error, null, "Download does not have an error");

  is(download.url, expectedServeURL,
     "Download URL = " + expectedServeURL);
  ok(download.id !== null, "Download id is defined");
  is(download.contentType, "application/octet-stream",
     "Download content type is application/octet-stream");
}

function downloadChange(evt) {
  var download = evt.download;
  checkConsistentDownloadAttributes(download);
  is(download.totalBytes, 1024, "Download total size is 1024 bytes");

  if (download.state === "succeeded") {
    is(download.currentBytes, 1024, "Download current size is 1024 bytes");
    SimpleTest.finish();
  } else if (download.state === "downloading") {
    // Note that this case may or may not trigger, depending on whether the
    // download is initially reported with 0 bytes (we should happen) or with
    // 1024 bytes (we should not happen).  If we do happen, an additional 8
    // TEST-PASS events should be logged.
    ok(download.currentBytes > lastKnownCurrentBytes,
       "Download current size is larger than last download change event");
    lastKnownCurrentBytes = download.currentBytes;
  } else {
    ok(false, "Unexpected download state = " + download.state);
  }
}

function downloadStart(evt) {
  var download = evt.download;
  checkConsistentDownloadAttributes(download);

  // We used to check that the currentBytes was 0.  This was incorrect.  It
  // is very common to first hear about the download already at 1024 bytes.
  is(download.state, "downloading", "Download state is downloading");

  download.onstatechange = downloadChange;
}

var steps = [
  // Start by setting the pref to true.
  function() {
    SpecialPowers.pushPrefEnv({
      set: [["dom.mozDownloads.enabled", true]]
    }, next);
  },

  // Setup the event listeners.
  function() {
    SpecialPowers.pushPermissions([
      {type: "downloads", allow: true, context: document}
    ], function() {
      navigator.mozDownloadManager.ondownloadstart = downloadStart;
      next();
    });
  },

  // Click on the <a download> to start the download.
  function() {
    document.getElementById("download1").click();
  }
];

next();

</script>
</pre>
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