diff -r 000000000000 -r 6474c204b198 browser/devtools/canvasdebugger/test/browser_canvas-frontend-reload-02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/canvasdebugger/test/browser_canvas-frontend-reload-02.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,70 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests that the frontend UI is properly reconfigured after reloading.
+ */
+
+function ifTestingSupported() {
+  let [target, debuggee, panel] = yield initCanavsDebuggerFrontend(SIMPLE_CANVAS_URL);
+  let { window, $, $all, EVENTS, SnapshotsListView, CallsListView } = panel.panelWin;
+
+  is(SnapshotsListView.itemCount, 0,
+    "There should be no snapshots initially displayed in the UI.");
+  is(CallsListView.itemCount, 0,
+    "There should be no function calls initially displayed in the UI.");
+
+  is($("#screenshot-container").hidden, true,
+    "The screenshot should not be initially displayed in the UI.");
+  is($("#snapshot-filmstrip").hidden, true,
+    "There should be no thumbnails initially displayed in the UI (1).");
+  is($all(".filmstrip-thumbnail").length, 0,
+    "There should be no thumbnails initially displayed in the UI (2).");
+
+  yield reload(target);
+
+  let recordingFinished = once(window, EVENTS.SNAPSHOT_RECORDING_FINISHED);
+  let callListPopulated = once(window, EVENTS.CALL_LIST_POPULATED);
+  let thumbnailsDisplayed = once(window, EVENTS.THUMBNAILS_DISPLAYED);
+  let screenshotDisplayed = once(window, EVENTS.CALL_SCREENSHOT_DISPLAYED);
+  SnapshotsListView._onRecordButtonClick();
+  yield promise.all([
+    recordingFinished,
+    callListPopulated,
+    thumbnailsDisplayed,
+    screenshotDisplayed
+  ]);
+
+  is(SnapshotsListView.itemCount, 1,
+    "There should be one snapshot displayed in the UI.");
+  is(CallsListView.itemCount, 8,
+    "All the function calls should now be displayed in the UI.");
+
+  is($("#screenshot-container").hidden, false,
+    "The screenshot should now be displayed in the UI.");
+  is($("#snapshot-filmstrip").hidden, false,
+    "All the thumbnails should now be displayed in the UI (1).");
+  is($all(".filmstrip-thumbnail").length, 4,
+    "All the thumbnails should now be displayed in the UI (2).");
+
+  let reset = once(window, EVENTS.UI_RESET);
+  let navigated = reload(target);
+
+  yield reset;
+  ok(true, "The UI was reset after the refresh button was clicked.");
+
+  is(SnapshotsListView.itemCount, 0,
+    "There should be no snapshots displayed in the UI after navigating.");
+  is(CallsListView.itemCount, 0,
+    "There should be no function calls displayed in the UI after navigating.");
+  is($("#snapshot-filmstrip").hidden, true,
+    "There should be no thumbnails displayed in the UI after navigating.");
+  is($("#screenshot-container").hidden, true,
+    "The screenshot should not be displayed in the UI after navigating.");
+
+  yield navigated;
+  ok(true, "The target finished reloading.");
+
+  yield teardown(panel);
+  finish();
+}