1 files changed, 28 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_unload.js b/js/xpconnect/tests/unit/test_unload.js
new file mode 100644
index 0000000000..6d6c7f4c69
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_unload.js
@@ -0,0 +1,28 @@
+/* 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/. */
+
+function run_test() {
+  var scope1 = {};
+  var exports1 = ChromeUtils.import("resource://gre/modules/NetUtil.jsm", scope1);
+
+  var scope2 = {};
+  var exports2 = ChromeUtils.import("resource://gre/modules/NetUtil.jsm", scope2);
+
+  Assert.ok(exports1 === exports2);
+  Assert.ok(scope1.NetUtil === scope2.NetUtil);
+
+  Cu.unload("resource://gre/modules/NetUtil.jsm");
+
+  var scope3 = {};
+  var exports3 = ChromeUtils.import("resource://gre/modules/NetUtil.jsm", scope3);
+
+  Assert.equal(false, exports1 === exports3);
+  Assert.equal(false, scope1.NetUtil === scope3.NetUtil);
+
+  // When the jsm was unloaded, the value of all its global's properties were
+  // set to undefined. While it must be safe (not crash) to call into the
+  // module, we expect it to throw an error (e.g., when trying to use Ci).
+  try { scope1.NetUtil.newURI("http://www.example.com"); } catch (e) {}
+  try { scope3.NetUtil.newURI("http://www.example.com"); } catch (e) {}
+}