diff -r 000000000000 -r 6474c204b198 netwerk/test/TestIncrementalDownload.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/test/TestIncrementalDownload.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,130 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 cin et: */
+/* 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/. */
+
+#include <stdlib.h>
+#include "TestCommon.h"
+#include "nsNetUtil.h"
+#include "nsIIncrementalDownload.h"
+#include "nsIRequestObserver.h"
+#include "nsIProgressEventSink.h"
+#include "nsThreadUtils.h"
+#include "nsAutoPtr.h"
+#include "prprf.h"
+#include "prenv.h"
+#include "mozilla/Attributes.h"
+
+//-----------------------------------------------------------------------------
+
+class FetchObserver MOZ_FINAL : public nsIRequestObserver
+                              , public nsIProgressEventSink
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIREQUESTOBSERVER
+  NS_DECL_NSIPROGRESSEVENTSINK
+};
+
+NS_IMPL_ISUPPORTS(FetchObserver, nsIRequestObserver,
+                  nsIProgressEventSink)
+
+NS_IMETHODIMP
+FetchObserver::OnStartRequest(nsIRequest *request, nsISupports *context)
+{
+  printf("FetchObserver::OnStartRequest\n");
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+FetchObserver::OnProgress(nsIRequest *request, nsISupports *context,
+                          uint64_t progress, uint64_t progressMax)
+{
+  printf("FetchObserver::OnProgress [%lu/%lu]\n",
+         (unsigned long)progress, (unsigned long)progressMax);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+FetchObserver::OnStatus(nsIRequest *request, nsISupports *context,
+                        nsresult status, const char16_t *statusText)
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+FetchObserver::OnStopRequest(nsIRequest *request, nsISupports *context,
+                             nsresult status)
+{
+  printf("FetchObserver::OnStopRequest [status=%x]\n",
+         static_cast<uint32_t>(status));
+
+  QuitPumpingEvents();
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+
+static nsresult
+DoIncrementalFetch(const char *uriSpec, const char *resultPath, int32_t chunkSize,
+                   int32_t interval)
+{
+  nsCOMPtr<nsIFile> resultFile;
+  nsresult rv = NS_NewNativeLocalFile(nsDependentCString(resultPath),
+                                      false, getter_AddRefs(resultFile));
+  if (NS_FAILED(rv))
+    return rv;
+
+  nsCOMPtr<nsIURI> uri;
+  rv = NS_NewURI(getter_AddRefs(uri), uriSpec);
+  if (NS_FAILED(rv))
+    return rv;
+
+  nsCOMPtr<nsIRequestObserver> observer = new FetchObserver();
+  if (!observer)
+    return NS_ERROR_OUT_OF_MEMORY;
+  
+  nsCOMPtr<nsIIncrementalDownload> download =
+      do_CreateInstance(NS_INCREMENTALDOWNLOAD_CONTRACTID, &rv);
+  if (NS_FAILED(rv))
+    return rv;
+
+  rv = download->Init(uri, resultFile, chunkSize, interval);
+  if (NS_FAILED(rv))
+    return rv;
+
+  rv = download->Start(observer, nullptr);
+  if (NS_FAILED(rv))
+    return rv;
+
+  PumpEvents();
+  return NS_OK;
+}
+
+int
+main(int argc, char **argv)
+{
+  if (PR_GetEnv("MOZ_BREAK_ON_MAIN"))
+    NS_BREAK();
+
+  if (argc < 5) {
+    fprintf(stderr, "USAGE: TestIncrementalDownload <url> <file> <chunksize> <interval-in-seconds>\n");
+    return -1;
+  }
+
+  nsresult rv = NS_InitXPCOM2(nullptr, nullptr, nullptr);
+  if (NS_FAILED(rv))
+    return -1;
+
+  int32_t chunkSize = atoi(argv[3]);
+  int32_t interval = atoi(argv[4]);
+
+  rv = DoIncrementalFetch(argv[1], argv[2], chunkSize, interval);
+  if (NS_FAILED(rv))
+    fprintf(stderr, "ERROR: DoIncrementalFetch failed [%x]\n",
+            static_cast<uint32_t>(rv));
+
+  NS_ShutdownXPCOM(nullptr);
+  return 0;
+}