diff -r 000000000000 -r 6474c204b198 content/base/test/TestNativeXMLHttpRequest.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/test/TestNativeXMLHttpRequest.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,98 @@
+/* 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 "TestHarness.h"
+
+#include "nsIDOMDocument.h"
+#include "nsIPrincipal.h"
+#include "nsIScriptSecurityManager.h"
+#include "nsIXMLHttpRequest.h"
+
+
+#define TEST_ENSURE_BASE(_test, _msg)       \
+  PR_BEGIN_MACRO                            \
+    if (_test) {                            \
+      fail(_msg);                           \
+      return NS_ERROR_FAILURE;              \
+    }                                       \
+  PR_END_MACRO
+
+#define TEST_ENSURE_SUCCESS(_rv, _msg)      \
+  TEST_ENSURE_BASE(NS_FAILED(_rv), _msg)
+
+#define TEST_ENSURE_FAILED(_rv, _msg)       \
+  TEST_ENSURE_BASE(NS_SUCCEEDED(_rv), _msg)
+
+#define TEST_URL_PREFIX                     \
+  "data:text/xml,"
+#define TEST_URL_CONTENT                    \
+  "<foo><bar></bar></foo>"
+
+#define TEST_URL                            \
+  TEST_URL_PREFIX TEST_URL_CONTENT
+
+nsresult TestNativeXMLHttpRequest()
+{
+  nsresult rv;
+
+  nsCOMPtr<nsIXMLHttpRequest> xhr =
+    do_CreateInstance(NS_XMLHTTPREQUEST_CONTRACTID, &rv);
+  TEST_ENSURE_SUCCESS(rv, "Couldn't create nsIXMLHttpRequest instance!");
+
+  NS_NAMED_LITERAL_CSTRING(getString, "GET");
+  NS_NAMED_LITERAL_CSTRING(testURL, TEST_URL);
+  const nsAString& empty = EmptyString();
+
+  nsCOMPtr<nsIScriptSecurityManager> secman =
+    do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
+  TEST_ENSURE_SUCCESS(rv, "Couldn't get script security manager!");
+
+  nsCOMPtr<nsIPrincipal> systemPrincipal;
+  rv = secman->GetSystemPrincipal(getter_AddRefs(systemPrincipal));
+  TEST_ENSURE_SUCCESS(rv, "Couldn't get system principal!");
+
+  rv = xhr->Init(systemPrincipal, nullptr, nullptr, nullptr);
+  TEST_ENSURE_SUCCESS(rv, "Couldn't initialize the XHR!");
+
+  rv = xhr->Open(getString, testURL, false, empty, empty);
+  TEST_ENSURE_SUCCESS(rv, "Open failed!");
+
+  rv = xhr->Send(nullptr);
+  TEST_ENSURE_SUCCESS(rv, "Send failed!");
+
+  nsAutoString response;
+  rv = xhr->GetResponseText(response);
+  TEST_ENSURE_SUCCESS(rv, "GetResponse failed!");
+
+  if (!response.EqualsLiteral(TEST_URL_CONTENT)) {
+    fail("Response text does not match!");
+    return NS_ERROR_FAILURE;
+  }
+
+  nsCOMPtr<nsIDOMDocument> dom;
+  rv = xhr->GetResponseXML(getter_AddRefs(dom));
+  TEST_ENSURE_SUCCESS(rv, "GetResponseXML failed!");
+
+  if (!dom) {
+    fail("No DOM document constructed!");
+    return NS_ERROR_FAILURE;
+  }
+
+  passed("Native XMLHttpRequest");
+  return NS_OK;
+}
+
+int main(int argc, char** argv)
+{
+  ScopedXPCOM xpcom("XMLHttpRequest");
+  if (xpcom.failed())
+    return 1;
+
+  int retval = 0;
+  if (NS_FAILED(TestNativeXMLHttpRequest())) {
+    retval = 1;
+  }
+
+  return retval;
+}