diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_function-display-name.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_function-display-name.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,63 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests that anonymous functions appear in the stack frame list with either
+ * their displayName property or a SpiderMonkey-inferred name.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_function-display-name.html";
+
+let gTab, gDebuggee, gPanel, gDebugger;
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    gTab = aTab;
+    gDebuggee = aDebuggee;
+    gPanel = aPanel;
+    gDebugger = gPanel.panelWin;
+
+    testAnonCall();
+  });
+}
+
+function testAnonCall() {
+  waitForSourceAndCaretAndScopes(gPanel, ".html", 15).then(() => {
+    ok(isCaretPos(gPanel, 15),
+      "The source editor caret position was incorrect.");
+    is(gDebugger.gThreadClient.state, "paused",
+      "Should only be getting stack frames while paused.");
+    is(gDebugger.document.querySelectorAll(".dbg-stackframe").length, 3,
+      "Should have three frames.");
+    is(gDebugger.document.querySelector("#stackframe-0 .dbg-stackframe-title").getAttribute("value"),
+      "anonFunc", "Frame name should be 'anonFunc'.");
+
+    testInferredName();
+  });
+
+  gDebuggee.evalCall();
+}
+
+function testInferredName() {
+  waitForDebuggerEvents(gPanel, gDebugger.EVENTS.FETCHED_SCOPES).then(() => {
+    ok(isCaretPos(gPanel, 15),
+      "The source editor caret position was incorrect.");
+    is(gDebugger.gThreadClient.state, "paused",
+      "Should only be getting stack frames while paused.");
+    is(gDebugger.document.querySelectorAll(".dbg-stackframe").length, 3,
+      "Should have three frames.");
+    is(gDebugger.document.querySelector("#stackframe-0 .dbg-stackframe-title").getAttribute("value"),
+      "a/<", "Frame name should be 'a/<'.");
+
+    resumeDebuggerThenCloseAndFinish(gPanel);
+  });
+
+  gDebugger.gThreadClient.resume();
+}
+
+registerCleanupFunction(function() {
+  gTab = null;
+  gDebuggee = null;
+  gPanel = null;
+  gDebugger = null;
+});