diff -r 000000000000 -r 6474c204b198 toolkit/components/downloads/test/unit/test_private_resume.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/downloads/test/unit/test_private_resume.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,118 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Public request gets times=0 cookie, completes
+// Private request gets times=1 cookie, canceled
+// Private resumed request sends times=1 cookie, completes
+
+function run_test() {
+  if (oldDownloadManagerDisabled()) {
+    return;
+  }
+
+  // Allow all cookies.
+  Services.prefs.setIntPref("network.cookie.cookieBehavior", 0);
+
+  do_test_pending();
+  let httpserv = new HttpServer();
+
+  let times = 0;
+  httpserv.registerPathHandler("/head_download_manager.js", function (meta, response) {
+    response.setHeader("Content-Type", "text/plain", false);
+    response.setStatusLine("1.1", !meta.hasHeader('range') ? 200 : 206);
+
+    // Set a cookie if none is sent with the request. Public and private requests
+    // should therefore receive different cookies, so we can tell if the resumed
+    // request is actually treated as private or not.
+    if (!meta.hasHeader('Cookie')) {
+      do_check_true(times == 0 || times == 1);
+      response.setHeader('Set-Cookie', 'times=' + times++);
+    } else {
+      do_check_eq(times, 2);
+      do_check_eq(meta.getHeader('Cookie'), 'times=1');
+    }
+    let full = "";
+    let body = "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"; //60
+    for (var i = 0; i < 1000; i++) {
+      full += body;
+    }
+    response.write(full);
+  });
+  httpserv.start(-1);
+
+  let state = 0;
+
+  let listener = {
+    onDownloadStateChange: function(aState, aDownload) {
+      switch (aDownload.state) {
+        case downloadUtils.downloadManager.DOWNLOAD_DOWNLOADING:
+          // We only care about the private download
+          if (state != 1)
+            break;
+
+          state++;
+          do_check_true(aDownload.resumable);
+
+          aDownload.pause();
+          do_check_eq(aDownload.state, downloadUtils.downloadManager.DOWNLOAD_PAUSED);
+
+          do_execute_soon(function() {
+            aDownload.resume();
+          });
+          break;
+
+        case downloadUtils.downloadManager.DOWNLOAD_FINISHED:
+          if (state == 0) {
+            do_execute_soon(function() {
+              // Perform an identical request but in private mode.
+              // It should receive a different cookie than the
+              // public request.
+
+              state++;
+
+              addDownload(httpserv, {
+                isPrivate: true,
+                sourceURI: downloadCSource,
+                downloadName: downloadCName + "!!!",
+                runBeforeStart: function (aDownload) {
+                  // Check that dl is retrievable
+                  do_check_eq(downloadUtils.downloadManager.activePrivateDownloadCount, 1);
+                }
+              });
+            });
+          } else if (state == 2) {
+            // We're done here.
+            do_execute_soon(function() {
+              httpserv.stop(do_test_finished);
+            });
+          }
+          break;
+
+        default:
+          break;
+      }
+    },
+    onStateChange: function(a, b, c, d, e) { },
+    onProgressChange: function(a, b, c, d, e, f, g) { },
+    onSecurityChange: function(a, b, c, d) { }
+  };
+
+  downloadUtils.downloadManager.addPrivacyAwareListener(listener);
+
+  const downloadCSource = "http://localhost:" +
+                          httpserv.identity.primaryPort +
+                          "/head_download_manager.js";
+  const downloadCName = "download-C";
+
+  // First a public download that completes without interruption.
+  let dl = addDownload(httpserv, {
+    isPrivate: false,
+    sourceURI: downloadCSource,
+    downloadName: downloadCName,
+    runBeforeStart: function (aDownload) {
+      // Check that dl is retrievable
+      do_check_eq(downloadUtils.downloadManager.activeDownloadCount, 1);
+    }
+  });
+}