The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/browser/components/sessionstore/test/browser_833286_atomic_backup.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,99 @@
     1.4 +/* Any copyright is dedicated to the Public Domain.
     1.5 +   http://creativecommons.org/publicdomain/zero/1.0/ */
     1.6 +
     1.7 +// This tests are for a sessionstore.js atomic backup.
     1.8 +// Each test will wait for a write to the Session Store
     1.9 +// before executing.
    1.10 +
    1.11 +let tmp = {};
    1.12 +Cu.import("resource://gre/modules/osfile.jsm", tmp);
    1.13 +Cu.import("resource:///modules/sessionstore/SessionFile.jsm", tmp);
    1.14 +
    1.15 +const {OS, SessionFile} = tmp;
    1.16 +
    1.17 +const PREF_SS_INTERVAL = "browser.sessionstore.interval";
    1.18 +// Full paths for sessionstore.js and sessionstore.bak.
    1.19 +const path = OS.Path.join(OS.Constants.Path.profileDir, "sessionstore.js");
    1.20 +const backupPath = OS.Path.join(OS.Constants.Path.profileDir,
    1.21 +  "sessionstore.bak");
    1.22 +
    1.23 +// A text decoder.
    1.24 +let gDecoder = new TextDecoder();
    1.25 +// Global variables that contain sessionstore.js and sessionstore.bak data for
    1.26 +// comparison between tests.
    1.27 +let gSSData;
    1.28 +let gSSBakData;
    1.29 +
    1.30 +
    1.31 +
    1.32 +add_task(function* testAfterFirstWrite() {
    1.33 +  // Ensure sessionstore.bak is not created. We start with a clean
    1.34 +  // profile so there was nothing to move to sessionstore.bak before
    1.35 +  // initially writing sessionstore.js
    1.36 +  let ssExists = yield OS.File.exists(path);
    1.37 +  let ssBackupExists = yield OS.File.exists(backupPath);
    1.38 +  ok(ssExists, "sessionstore.js should exist.");
    1.39 +  ok(!ssBackupExists, "sessionstore.bak should not have been created, yet");
    1.40 +
    1.41 +  // Save sessionstore.js data to compare to the sessionstore.bak data in the
    1.42 +  // next test.
    1.43 +  let array = yield OS.File.read(path);
    1.44 +  gSSData = gDecoder.decode(array);
    1.45 +
    1.46 +  // Manually move to the backup since the first write has already happened
    1.47 +  // and a backup would not be triggered again.
    1.48 +  yield OS.File.move(path, backupPath);
    1.49 +
    1.50 +  yield forceSaveState();
    1.51 +});
    1.52 +
    1.53 +add_task(function* testReadBackup() {
    1.54 +  // Ensure sessionstore.bak is finally created.
    1.55 +  let ssExists = yield OS.File.exists(path);
    1.56 +  let ssBackupExists = yield OS.File.exists(backupPath);
    1.57 +  ok(ssExists, "sessionstore.js exists.");
    1.58 +  ok(ssBackupExists, "sessionstore.bak should now be created.");
    1.59 +
    1.60 +  // Read sessionstore.bak data.
    1.61 +  let array = yield OS.File.read(backupPath);
    1.62 +  gSSBakData = gDecoder.decode(array);
    1.63 +
    1.64 +  // Make sure that the sessionstore.bak is identical to the last
    1.65 +  // sessionstore.js.
    1.66 +  is(gSSBakData, gSSData, "sessionstore.js is backed up correctly.");
    1.67 +
    1.68 +  // Read latest sessionstore.js.
    1.69 +  array = yield OS.File.read(path);
    1.70 +  gSSData = gDecoder.decode(array);
    1.71 +
    1.72 +  // Read sessionstore.js with SessionFile.read.
    1.73 +  let ssDataRead = yield SessionFile.read();
    1.74 +  is(ssDataRead, gSSData, "SessionFile.read read sessionstore.js correctly.");
    1.75 +
    1.76 +  // Remove sessionstore.js to test fallback onto sessionstore.bak.
    1.77 +  yield OS.File.remove(path);
    1.78 +  ssExists = yield OS.File.exists(path);
    1.79 +  ok(!ssExists, "sessionstore.js should be removed now.");
    1.80 +
    1.81 +  // Read sessionstore.bak with SessionFile.read.
    1.82 +  ssDataRead = yield SessionFile.read();
    1.83 +  is(ssDataRead, gSSBakData,
    1.84 +    "SessionFile.read read sessionstore.bak correctly.");
    1.85 +
    1.86 +  yield forceSaveState();
    1.87 +});
    1.88 +
    1.89 +add_task(function* testBackupUnchanged() {
    1.90 +  // Ensure sessionstore.bak is backed up only once.
    1.91 +
    1.92 +  // Read sessionstore.bak data.
    1.93 +  let array = yield OS.File.read(backupPath);
    1.94 +  let ssBakData = gDecoder.decode(array);
    1.95 +  // Ensure the sessionstore.bak did not change.
    1.96 +  is(ssBakData, gSSBakData, "sessionstore.bak is unchanged.");
    1.97 +});
    1.98 +
    1.99 +add_task(function* cleanup() {
   1.100 +  // Cleaning up after the test: removing the sessionstore.bak file.
   1.101 +  yield OS.File.remove(backupPath);
   1.102 +});