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+<!DOCTYPE html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=938023
+-->
+<head>
+  <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>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+
+<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">
+</div>
+<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>
+</body>
+</html>
+