1 files changed, 26 insertions, 0 deletions
diff --git a/browser/base/content/test/general/browser_bug580956.js b/browser/base/content/test/general/browser_bug580956.js
new file mode 100644
index 000000000..b8e7bc20b
--- /dev/null
+++ b/browser/base/content/test/general/browser_bug580956.js
@@ -0,0 +1,26 @@
+function numClosedTabs() {
+  return SessionStore.getClosedTabCount(window);
+}
+
+function isUndoCloseEnabled() {
+  updateTabContextMenu();
+  return !document.getElementById("context_undoCloseTab").disabled;
+}
+
+function test() {
+  waitForExplicitFinish();
+
+  gPrefService.setIntPref("browser.sessionstore.max_tabs_undo", 0);
+  gPrefService.clearUserPref("browser.sessionstore.max_tabs_undo");
+  is(numClosedTabs(), 0, "There should be 0 closed tabs.");
+  ok(!isUndoCloseEnabled(), "Undo Close Tab should be disabled.");
+
+  var tab = gBrowser.addTab("http://mochi.test:8888/");
+  var browser = gBrowser.getBrowserForTab(tab);
+  BrowserTestUtils.browserLoaded(browser).then(() => {
+    BrowserTestUtils.removeTab(tab).then(() => {
+      ok(isUndoCloseEnabled(), "Undo Close Tab should be enabled.");
+      finish();
+    });
+  });
+}