import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

browser/components/sessionstore/test/browser_586068-apptabs.js

@@ -0,0 +1,58 @@
+/* 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/. */
+
+requestLongerTimeout(2);
+
+const PREF_RESTORE_ON_DEMAND = "browser.sessionstore.restore_on_demand";
+
+add_task(function* test() {
+  Services.prefs.setBoolPref(PREF_RESTORE_ON_DEMAND, true);
+  registerCleanupFunction(function () {
+    Services.prefs.clearUserPref(PREF_RESTORE_ON_DEMAND);
+  });
+
+  let state = { windows: [{ tabs: [
+    { entries: [{ url: "http://example.org/#1" }], extData: { "uniq": r() }, pinned: true },
+    { entries: [{ url: "http://example.org/#2" }], extData: { "uniq": r() }, pinned: true },
+    { entries: [{ url: "http://example.org/#3" }], extData: { "uniq": r() }, pinned: true },
+    { entries: [{ url: "http://example.org/#4" }], extData: { "uniq": r() } },
+    { entries: [{ url: "http://example.org/#5" }], extData: { "uniq": r() } },
+    { entries: [{ url: "http://example.org/#6" }], extData: { "uniq": r() } },
+    { entries: [{ url: "http://example.org/#7" }], extData: { "uniq": r() } },
+  ], selected: 5 }] };
+
+  let loadCount = 0;
+  let promiseRestoringTabs = new Promise(resolve => {
+    gProgressListener.setCallback(function (aBrowser, aNeedRestore, aRestoring, aRestored) {
+      loadCount++;
+
+      // We'll make sure that the loads we get come from pinned tabs or the
+      // the selected tab.
+
+      // get the tab
+      let tab;
+      for (let i = 0; i < window.gBrowser.tabs.length; i++) {
+        if (!tab && window.gBrowser.tabs[i].linkedBrowser == aBrowser)
+          tab = window.gBrowser.tabs[i];
+      }
+
+      ok(tab.pinned || tab.selected,
+         "load came from pinned or selected tab");
+
+      // We should get 4 loads: 3 app tabs + 1 normal selected tab
+      if (loadCount < 4)
+        return;
+
+      gProgressListener.unsetCallback();
+      resolve();
+    });
+  });
+
+  let backupState = ss.getBrowserState();
+  ss.setBrowserState(JSON.stringify(state));
+  yield promiseRestoringTabs;
+
+  // Cleanup.
+  yield promiseBrowserState(backupState);
+});