1 files changed, 27 insertions, 0 deletions
diff --git a/toolkit/mozapps/webextensions/test/xpcshell/test_bug595081.js b/toolkit/mozapps/webextensions/test/xpcshell/test_bug595081.js
new file mode 100644
index 000000000..db53dc747
--- /dev/null
+++ b/toolkit/mozapps/webextensions/test/xpcshell/test_bug595081.js
@@ -0,0 +1,27 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// Tests that the AddonManager objects cannot be tampered with
+
+function run_test() {
+  // Setup for test
+  createAppInfo("xpcshell@tests.mozilla.org", "XPCShell", "1", "1.9.2");
+
+  startupManager();
+
+  // Verify that properties cannot be changed
+  let old = AddonManager.STATE_AVAILABLE;
+  AddonManager.STATE_AVAILABLE = 28;
+  do_check_eq(AddonManager.STATE_AVAILABLE, old);
+
+  // Verify that functions cannot be replaced
+  AddonManager.isInstallEnabled = function() {
+    do_throw("Should not be able to replace a function");
+  }
+  AddonManager.isInstallEnabled("application/x-xpinstall");
+
+  // Verify that properties cannot be added
+  AddonManager.foo = "bar";
+  do_check_false("foo" in AddonManager);
+}