diff -r 000000000000 -r 6474c204b198 toolkit/mozapps/update/tests/unit_service_updater/marFileLockedFailureCompleteSvc_win.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/mozapps/update/tests/unit_service_updater/marFileLockedFailureCompleteSvc_win.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+/* File locked complete MAR file patch apply failure test */
+
+function run_test() {
+  if (!shouldRunServiceTest()) {
+    return;
+  }
+
+  setupTestCommon();
+  gTestFiles = gTestFilesCompleteSuccess;
+  gTestDirs = gTestDirsCompleteSuccess;
+  setTestFilesAndDirsForFailure();
+  setupUpdaterTest(FILE_COMPLETE_MAR, false, false);
+
+  // Exclusively lock an existing file so it is in use during the update.
+  let helperBin = getTestDirFile(FILE_HELPER_BIN);
+  let helperDestDir = getApplyDirFile("a/b/");
+  helperBin.copyTo(helperDestDir, FILE_HELPER_BIN);
+  helperBin = getApplyDirFile("a/b/" + FILE_HELPER_BIN);
+  // Strip off the first two directories so the path has to be from the helper's
+  // working directory.
+  let lockFileRelPath = gTestFiles[3].relPathDir.split("/");
+  lockFileRelPath = lockFileRelPath.slice(2);
+  lockFileRelPath = lockFileRelPath.join("/") + "/" + gTestFiles[3].fileName;
+  let args = [getApplyDirPath() + "a/b/", "input", "output", "-s",
+              HELPER_SLEEP_TIMEOUT, lockFileRelPath];
+  let lockFileProcess = AUS_Cc["@mozilla.org/process/util;1"].
+                     createInstance(AUS_Ci.nsIProcess);
+  lockFileProcess.init(helperBin);
+  lockFileProcess.run(false, args, args.length);
+
+  setupAppFilesAsync();
+}
+
+function setupAppFilesFinished() {
+  do_timeout(TEST_HELPER_TIMEOUT, waitForHelperSleep);
+}
+
+function doUpdate() {
+  runUpdateUsingService(STATE_PENDING_SVC, STATE_FAILED);
+}
+
+function checkUpdateFinished() {
+  setupHelperFinish();
+}
+
+function checkUpdate() {
+  checkFilesAfterUpdateFailure();
+  checkUpdateLogContains(ERR_RENAME_FILE);
+  checkCallbackServiceLog();
+}