1 files changed, 26 insertions, 0 deletions
diff --git a/browser/components/installerprefs/test/unit/test_pref_change.js b/browser/components/installerprefs/test/unit/test_pref_change.js
new file mode 100644
index 0000000000..aba37c266d
--- /dev/null
+++ b/browser/components/installerprefs/test/unit/test_pref_change.js
@@ -0,0 +1,26 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+/**
+ * Test that pref values are correctly updated when they change.
+ */
+
+add_task(function () {
+  const PREFS_LIST = ["installer.pref"];
+
+  Services.prefs.setBoolPref("installer.pref", true);
+
+  startModule(PREFS_LIST);
+
+  verifyReflectedPrefs(PREFS_LIST);
+
+  Services.prefs.setBoolPref("installer.pref", false);
+
+  verifyReflectedPrefs(PREFS_LIST);
+
+  Services.prefs.setBoolPref("installer.pref", true);
+
+  verifyReflectedPrefs(PREFS_LIST);
+});