michael@0: /* Any copyright is dedicated to the Public Domain.
michael@0:    http://creativecommons.org/publicdomain/zero/1.0/ */
michael@0: 
michael@0: Cu.import("resource://gre/modules/Services.jsm", this);
michael@0: Cu.import("resource://gre/modules/osfile.jsm", this);
michael@0: Cu.import("resource://gre/modules/Task.jsm", this);
michael@0: 
michael@0: function test() {
michael@0:   waitForExplicitFinish();
michael@0: 
michael@0:   Task.spawn(function task() {
michael@0:     try {
michael@0:       // Wait until initialization is complete
michael@0:       yield SessionStore.promiseInitialized;
michael@0: 
michael@0:       const PREF_UPGRADE = "browser.sessionstore.upgradeBackup.latestBuildID";
michael@0:       let buildID = Services.appinfo.platformBuildID;
michael@0: 
michael@0:       // Write state once before starting the test to
michael@0:       // ensure sessionstore.js writes won't happen in between.
michael@0:       yield forceSaveState();
michael@0: 
michael@0:       // Force backup to take place with a file decided by us
michael@0:       Services.prefs.setCharPref(PREF_UPGRADE, "");
michael@0:       let contents = "browser_upgrade_backup.js";
michael@0:       let pathStore = OS.Path.join(OS.Constants.Path.profileDir, "sessionstore.js");
michael@0:       yield OS.File.writeAtomic(pathStore, contents, { tmpPath: pathStore + ".tmp" });
michael@0:       yield SessionStore._internal._performUpgradeBackup();
michael@0:       is(Services.prefs.getCharPref(PREF_UPGRADE), buildID, "upgrade backup should be set (again)");
michael@0: 
michael@0:       let pathBackup = OS.Path.join(OS.Constants.Path.profileDir, "sessionstore.bak-" + Services.appinfo.platformBuildID);
michael@0:       is((yield OS.File.exists(pathBackup)), true, "upgrade backup file has been created");
michael@0: 
michael@0:       let data = yield OS.File.read(pathBackup);
michael@0:       is(new TextDecoder().decode(data), contents, "upgrade backup contains the expected contents");
michael@0: 
michael@0:       // Ensure that we don't re-backup by accident
michael@0:       yield OS.File.writeAtomic(pathStore, "something else entirely", { tmpPath: pathStore + ".tmp" });
michael@0:       yield SessionStore._internal._performUpgradeBackup();
michael@0:       data = yield OS.File.read(pathBackup);
michael@0:       is(new TextDecoder().decode(data), contents, "upgrade backup hasn't changed");
michael@0: 
michael@0:     } catch (ex) {
michael@0:       ok(false, "Uncaught error: " + ex + " at " + ex.stack);
michael@0:     } finally {
michael@0:       finish();
michael@0:     }
michael@0:   });
michael@0: }