1 files changed, 37 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_function_names.js b/js/xpconnect/tests/unit/test_function_names.js
new file mode 100644
index 0000000000..6eadc1fce7
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_function_names.js
@@ -0,0 +1,37 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function callback() {}
+
+let sandbox = Cu.Sandbox(this);
+let callbackWrapped = Cu.evalInSandbox("(function wrapped() {})", sandbox);
+
+function run_test() {
+  let functions = [
+    [{ notify: callback }, "callback[test_function_names.js]:JS"],
+    [{ notify: { notify: callback } }, "callback[test_function_names.js]:JS"],
+    [callback, "callback[test_function_names.js]:JS"],
+    [function() {}, "run_test/functions<[test_function_names.js]:JS"],
+    [function foobar() {}, "foobar[test_function_names.js]:JS"],
+    [function Δ() {}, "Δ[test_function_names.js]:JS"],
+    [{ notify1: callback, notify2: callback }, "nonfunction:JS"],
+    [{ notify: 10 }, "nonfunction:JS"],
+    [{}, "nonfunction:JS"],
+    [{ notify: callbackWrapped }, "wrapped[test_function_names.js]:JS"],
+  ];
+
+  // Use the observer service so we can get double-wrapped functions.
+  var obs = Cc["@mozilla.org/observer-service;1"].getService(Ci.nsIObserverService);
+
+  function observer(subject, topic, data)
+  {
+    let named = subject.QueryInterface(Ci.nsINamed);
+    Assert.equal(named.name, data);
+    dump(`name: ${named.name}\n`);
+  }
+  obs.addObserver(observer, "test-obs-fun", false);
+
+  for (let [f, requiredName] of functions) {
+    obs.notifyObservers(f, "test-obs-fun", requiredName);
+  }
+}