1 files changed, 41 insertions, 0 deletions
diff --git a/toolkit/mozapps/update/tests/unit_base_updater/marVersionDowngrade.js b/toolkit/mozapps/update/tests/unit_base_updater/marVersionDowngrade.js
new file mode 100644
index 0000000000..6f3e26fe0f
--- /dev/null
+++ b/toolkit/mozapps/update/tests/unit_base_updater/marVersionDowngrade.js
@@ -0,0 +1,41 @@
+/* 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/.
+ */
+
+/* Test version downgrade MAR security check */
+
+async function run_test() {
+  if (!MOZ_VERIFY_MAR_SIGNATURE) {
+    return;
+  }
+
+  if (!setupTestCommon()) {
+    return;
+  }
+  gTestFiles = gTestFilesCompleteSuccess;
+  gTestDirs = gTestDirsCompleteSuccess;
+  setTestFilesAndDirsForFailure();
+  await setupUpdaterTest(FILE_OLD_VERSION_MAR, false);
+  // If execv is used the updater process will turn into the callback process
+  // and the updater's return code will be that of the callback process.
+  runUpdate(
+    STATE_FAILED_VERSION_DOWNGRADE_ERROR,
+    false,
+    USE_EXECV ? 0 : 1,
+    false
+  );
+  standardInit();
+  checkPostUpdateRunningFile(false);
+  checkFilesAfterUpdateFailure(getApplyDirFile);
+  checkUpdateLogContains(STATE_FAILED_VERSION_DOWNGRADE_ERROR);
+  await waitForUpdateXMLFiles();
+  checkUpdateManager(
+    STATE_NONE,
+    false,
+    STATE_FAILED,
+    VERSION_DOWNGRADE_ERROR,
+    1
+  );
+  waitForFilesInUse();
+}