diff -r 000000000000 -r 6474c204b198 netwerk/test/TestOpen.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/test/TestOpen.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "TestCommon.h"
+#include "nsCOMPtr.h"
+#include "nsStringAPI.h"
+#include "nsIURI.h"
+#include "nsIChannel.h"
+#include "nsIHttpChannel.h"
+#include "nsIInputStream.h"
+#include "nsNetUtil.h"
+#include "mozilla/unused.h"
+
+#include <stdio.h>
+
+using namespace mozilla;
+
+/*
+ * Test synchronous Open.
+ */
+
+#define RETURN_IF_FAILED(rv, what) \
+    PR_BEGIN_MACRO \
+    if (NS_FAILED(rv)) { \
+        printf(what ": failed - %08x\n", static_cast<uint32_t>(rv)); \
+        return -1; \
+    } \
+    PR_END_MACRO
+
+int
+main(int argc, char **argv)
+{
+    if (test_common_init(&argc, &argv) != 0)
+        return -1;
+
+    nsresult rv = NS_InitXPCOM2(nullptr, nullptr, nullptr);
+    if (NS_FAILED(rv)) return -1;
+
+    char buf[256];
+
+    if (argc != 3) {
+        printf("Usage: TestOpen url filename\nLoads a URL using ::Open, writing it to a file\n");
+        return -1;
+    }
+
+    nsCOMPtr<nsIURI> uri;
+    nsCOMPtr<nsIInputStream> stream;
+
+    rv = NS_NewURI(getter_AddRefs(uri), argv[1]);
+    RETURN_IF_FAILED(rv, "NS_NewURI");
+
+    rv = NS_OpenURI(getter_AddRefs(stream), uri);
+    RETURN_IF_FAILED(rv, "NS_OpenURI");
+
+    FILE* outfile = fopen(argv[2], "wb");
+    if (!outfile) {
+      printf("error opening %s\n", argv[2]);
+      return 1;
+    }
+
+    uint32_t read;
+    while (NS_SUCCEEDED(stream->Read(buf, sizeof(buf), &read)) && read) {
+      unused << fwrite(buf, 1, read, outfile);
+    }
+    printf("Done\n");
+
+    fclose(outfile);
+
+    NS_ShutdownXPCOM(nullptr);
+    return 0;
+}