1 files changed, 48 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 0000000000..67623bd3ab
--- /dev/null
+++ b/browser/components/sessionstore/test/browser_367052.js
@@ -0,0 +1,48 @@
+/* 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(async function () {
+  // make sure that the next closed tab will increase getClosedTabCountForWindow
+  let max_tabs_undo = Services.prefs.getIntPref(
+    "browser.sessionstore.max_tabs_undo"
+  );
+  Services.prefs.setIntPref(
+    "browser.sessionstore.max_tabs_undo",
+    max_tabs_undo + 1
+  );
+  registerCleanupFunction(() =>
+    Services.prefs.clearUserPref("browser.sessionstore.max_tabs_undo")
+  );
+
+  forgetClosedTabs(window);
+
+  // restore a blank tab
+  let tab = BrowserTestUtils.addTab(gBrowser, "about:mozilla");
+  await promiseBrowserLoaded(tab.linkedBrowser);
+
+  let count = await promiseSHistoryCount(tab.linkedBrowser);
+  ok(count >= 1, "the new tab does have at least one history entry");
+
+  await promiseTabState(tab, { entries: [] });
+
+  // We may have a different sessionHistory object if the tab
+  // switched from non-remote to remote.
+  count = await promiseSHistoryCount(tab.linkedBrowser);
+  is(count, 0, "the tab was restored without any history whatsoever");
+
+  await promiseRemoveTabAndSessionState(tab);
+  is(
+    ss.getClosedTabCountForWindow(window),
+    0,
+    "The closed blank tab wasn't added to Recently Closed Tabs"
+  );
+});
+
+function promiseSHistoryCount(browser) {
+  return SpecialPowers.spawn(browser, [], async function () {
+    return docShell.QueryInterface(Ci.nsIWebNavigation).sessionHistory.count;
+  });
+}