diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_stack-03.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_stack-03.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,71 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that stackframes are scrollable.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_recursion-stack.html";
+
+let gTab, gDebuggee, gPanel, gDebugger;
+let gFrames, gClassicFrames, gFramesScrollingInterval;
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    gTab = aTab;
+    gDebuggee = aDebuggee;
+    gPanel = aPanel;
+    gDebugger = gPanel.panelWin;
+    gFrames = gDebugger.DebuggerView.StackFrames;
+    gClassicFrames = gDebugger.DebuggerView.StackFramesClassicList;
+
+    waitForSourceAndCaretAndScopes(gPanel, ".html", 26).then(performTest);
+
+    gDebuggee.gRecurseLimit = (gDebugger.gCallStackPageSize * 2) + 1;
+    gDebuggee.recurse();
+  });
+}
+
+function performTest() {
+  is(gDebugger.gThreadClient.state, "paused",
+    "Should only be getting stack frames while paused.");
+  is(gFrames.itemCount, gDebugger.gCallStackPageSize,
+    "Should have only the max limit of frames.");
+  is(gClassicFrames.itemCount, gDebugger.gCallStackPageSize,
+    "Should have only the max limit of frames in the mirrored view as well.")
+
+  gDebugger.gThreadClient.addOneTimeListener("framesadded", () => {
+    is(gFrames.itemCount, gDebugger.gCallStackPageSize * 2,
+      "Should now have twice the max limit of frames.");
+    is(gClassicFrames.itemCount, gDebugger.gCallStackPageSize * 2,
+      "Should now have twice the max limit of frames in the mirrored view as well.");
+
+    gDebugger.gThreadClient.addOneTimeListener("framesadded", () => {
+      is(gFrames.itemCount, gDebuggee.gRecurseLimit,
+        "Should have reached the recurse limit.");
+      is(gClassicFrames.itemCount, gDebuggee.gRecurseLimit,
+        "Should have reached the recurse limit in the mirrored view as well.");
+
+      gDebugger.gThreadClient.resume(() => {
+        window.clearInterval(gFramesScrollingInterval);
+        closeDebuggerAndFinish(gPanel);
+      });
+    });
+  });
+
+  gFramesScrollingInterval = window.setInterval(() => {
+    gFrames.widget._list.scrollByIndex(-1);
+  }, 100);
+}
+
+registerCleanupFunction(function() {
+  window.clearInterval(gFramesScrollingInterval);
+  gFramesScrollingInterval = null;
+
+  gTab = null;
+  gDebuggee = null;
+  gPanel = null;
+  gDebugger = null;
+  gFrames = null;
+  gClassicFrames = null;
+});