Add m-esr52 at 52.6.0

1 files changed, 41 insertions, 0 deletions

diff --git a/browser/components/sessionstore/test/browser_367052.js b/browser/components/sessionstore/test/browser_367052.js
new file mode 100644
index 000000000..3cc89a66c
--- /dev/null
+++ b/browser/components/sessionstore/test/browser_367052.js
@@ -0,0 +1,41 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+add_task(function* () {
+  // make sure that the next closed tab will increase getClosedTabCount
+  let max_tabs_undo = gPrefService.getIntPref("browser.sessionstore.max_tabs_undo");
+  gPrefService.setIntPref("browser.sessionstore.max_tabs_undo", max_tabs_undo + 1);
+  registerCleanupFunction(() => gPrefService.clearUserPref("browser.sessionstore.max_tabs_undo"));
+
+  // Empty the list of closed tabs.
+  while (ss.getClosedTabCount(window)) {
+    ss.forgetClosedTab(window, 0);
+  }
+
+  // restore a blank tab
+  let tab = gBrowser.addTab("about:");
+  yield promiseBrowserLoaded(tab.linkedBrowser);
+
+  let count = yield promiseSHistoryCount(tab.linkedBrowser);
+  ok(count >= 1, "the new tab does have at least one history entry");
+
+  yield promiseTabState(tab, {entries: []});
+
+  // We may have a different sessionHistory object if the tab
+  // switched from non-remote to remote.
+  count = yield promiseSHistoryCount(tab.linkedBrowser);
+  is(count, 0, "the tab was restored without any history whatsoever");
+
+  yield promiseRemoveTab(tab);
+  is(ss.getClosedTabCount(window), 0,
+     "The closed blank tab wasn't added to Recently Closed Tabs");
+});
+
+function promiseSHistoryCount(browser) {
+  return ContentTask.spawn(browser, null, function* () {
+    return docShell.QueryInterface(Ci.nsIWebNavigation).sessionHistory.count;
+  });
+}