1 files changed, 23 insertions, 0 deletions
diff --git a/testing/xpcshell/example/unit/test_load.js b/testing/xpcshell/example/unit/test_load.js
new file mode 100644
index 0000000000..ecac04e3ac
--- /dev/null
+++ b/testing/xpcshell/example/unit/test_load.js
@@ -0,0 +1,23 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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/. */
+
+var subscriptLoaded = false;
+
+function run_test() {
+  load("load_subscript.js");
+  Assert.ok(subscriptLoaded);
+  subscriptLoaded = false;
+  try {
+    load("file_that_does_not_exist.js");
+    subscriptLoaded = true;
+  } catch (ex) {
+    Assert.ok(
+      ex.message.startsWith("can't open "),
+      `Unexpected message: ${ex.message}`
+    );
+  }
+  Assert.ok(!subscriptLoaded, "load() should throw an error");
+}