diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_launch.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_launch.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,59 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let newWin;
+
+// ----------
+function test() {
+  waitForExplicitFinish();
+
+  let panelSelected = false;
+  registerCleanupFunction(function () ok(panelSelected, "panel is selected"));
+
+  let onLoad = function (win) {
+    registerCleanupFunction(function () win.close());
+
+    newWin = win;
+
+    let onSelect = function(event) {
+      if (deck != event.target)
+        return;
+
+      let iframe = win.document.getElementById("tab-view");
+      if (deck.selectedPanel != iframe)
+        return;
+
+      deck.removeEventListener("select", onSelect, true);
+      panelSelected = true;
+    };
+
+    let deck = win.document.getElementById("tab-view-deck");
+    deck.addEventListener("select", onSelect, true);
+  };
+
+  let onShow = function (win) {
+    executeSoon(function() {
+      testMethodToHideAndShowTabView(function() {
+        newWin.document.getElementById("menu_tabview").doCommand();
+      }, function() {
+        testMethodToHideAndShowTabView(function() {
+          EventUtils.synthesizeKey("E", { accelKey: true, shiftKey: true }, newWin);
+        }, finish);
+      });
+    });
+  };
+
+  newWindowWithTabView(onShow, onLoad);
+}
+
+function testMethodToHideAndShowTabView(executeFunc, callback) {
+  whenTabViewIsHidden(function() {
+    ok(!newWin.TabView.isVisible(), "Tab View is not visible after executing the function");
+    whenTabViewIsShown(function() {
+      ok(newWin.TabView.isVisible(), "Tab View is visible after executing the function again");
+      callback();
+    }, newWin);
+    executeFunc();
+  }, newWin);
+  executeFunc();
+}