1 files changed, 64 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg_stack-03.js b/devtools/client/debugger/test/mochitest/browser_dbg_stack-03.js
new file mode 100644
index 000000000..28993bfd5
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg_stack-03.js
@@ -0,0 +1,64 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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 framesScrollingInterval;
+
+function test() {
+  let options = {
+    source: TAB_URL,
+    line: 1
+  };
+  initDebugger(TAB_URL, options).then(([aTab, aDebuggee, aPanel]) => {
+    const tab = aTab;
+    const debuggee = aDebuggee;
+    const panel = aPanel;
+    const gDebugger = panel.panelWin;
+    const frames = gDebugger.DebuggerView.StackFrames;
+    const classicFrames = gDebugger.DebuggerView.StackFramesClassicList;
+
+    Task.spawn(function* () {
+      framesScrollingInterval = window.setInterval(() => {
+        frames.widget._list.scrollByIndex(-1);
+      }, 100);
+
+      yield waitForDebuggerEvents(panel, gDebugger.EVENTS.AFTER_FRAMES_REFILLED);
+
+      is(gDebugger.gThreadClient.state, "paused",
+        "Should only be getting stack frames while paused.");
+      is(frames.itemCount, gDebugger.gCallStackPageSize,
+        "Should have only the max limit of frames.");
+      is(classicFrames.itemCount, gDebugger.gCallStackPageSize,
+        "Should have only the max limit of frames in the mirrored view as well.");
+
+      yield waitForDebuggerEvents(panel, gDebugger.EVENTS.AFTER_FRAMES_REFILLED);
+
+      is(frames.itemCount, gDebugger.gCallStackPageSize * 2,
+        "Should now have twice the max limit of frames.");
+      is(classicFrames.itemCount, gDebugger.gCallStackPageSize * 2,
+        "Should now have twice the max limit of frames in the mirrored view as well.");
+
+      yield waitForDebuggerEvents(panel, gDebugger.EVENTS.AFTER_FRAMES_REFILLED);
+
+      is(frames.itemCount, debuggee.gRecurseLimit,
+        "Should have reached the recurse limit.");
+      is(classicFrames.itemCount, debuggee.gRecurseLimit,
+        "Should have reached the recurse limit in the mirrored view as well.");
+
+
+      // Call stack frame scrolling should stop before
+      // we resume the gDebugger as it could be a source of race conditions.
+      window.clearInterval(framesScrollingInterval);
+      resumeDebuggerThenCloseAndFinish(panel);
+    });
+
+    debuggee.gRecurseLimit = (gDebugger.gCallStackPageSize * 2) + 1;
+    debuggee.recurse();
+  });
+}