The Tor Browser: services/sync/tests/unit/test_syncengine_sync.js@6474c204b198 (annotated)

services/sync/tests/unit/test_syncengine_sync.js@6474c204b198 (annotated)

services/sync/tests/unit/test_syncengine_sync.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 Cu.import("resource://services-sync/constants.js");
 Cu.import("resource://services-sync/engines.js");
 Cu.import("resource://services-sync/policies.js");
 Cu.import("resource://services-sync/record.js");
 Cu.import("resource://services-sync/resource.js");
 Cu.import("resource://services-sync/service.js");
 Cu.import("resource://services-sync/util.js");
 Cu.import("resource://testing-common/services/sync/rotaryengine.js");
 Cu.import("resource://testing-common/services/sync/utils.js");
 function makeRotaryEngine() {
   return new RotaryEngine(Service);
 }
 function cleanAndGo(server) {
   Svc.Prefs.resetBranch("");
   Svc.Prefs.set("log.logger.engine.rotary", "Trace");
   Service.recordManager.clearCache();
   server.stop(run_next_test);
 }
 function configureService(server, username, password) {
   Service.clusterURL = server.baseURI;
   Service.identity.account = username || "foo";
   Service.identity.basicPassword = password || "password";
 }
 function createServerAndConfigureClient() {
   let engine = new RotaryEngine(Service);
   let contents = {
     meta: {global: {engines: {rotary: {version: engine.version,
                                        syncID:  engine.syncID}}}},
     crypto: {},
     rotary: {}
   };
   const USER = "foo";
   let server = new SyncServer();
   server.registerUser(USER, "password");
   server.createContents(USER, contents);
   server.start();
   Service.serverURL = server.baseURI;
   Service.clusterURL = server.baseURI;
   Service.identity.username = USER;
   Service._updateCachedURLs();
   return [engine, server, USER];
 }
 function run_test() {
   generateNewKeys(Service.collectionKeys);
   Svc.Prefs.set("log.logger.engine.rotary", "Trace");
   run_next_test();
 }
 /*
  * Tests
  *
  * SyncEngine._sync() is divided into four rather independent steps:
  *
  * - _syncStartup()
  * - _processIncoming()
  * - _uploadOutgoing()
  * - _syncFinish()
  *
  * In the spirit of unit testing, these are tested individually for
  * different scenarios below.
  */
 add_test(function test_syncStartup_emptyOrOutdatedGlobalsResetsSync() {
   _("SyncEngine._syncStartup resets sync and wipes server data if there's no or an outdated global record");
   // Some server side data that's going to be wiped
   let collection = new ServerCollection();
   collection.insert('flying',
                     encryptPayload({id: 'flying',
                                     denomination: "LNER Class A3 4472"}));
   collection.insert('scotsman',
                     encryptPayload({id: 'scotsman',
                                     denomination: "Flying Scotsman"}));
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   Service.identity.username = "foo";
   let engine = makeRotaryEngine();
   engine._store.items = {rekolok: "Rekonstruktionslokomotive"};
   try {
     // Confirm initial environment
     do_check_eq(engine._tracker.changedIDs["rekolok"], undefined);
     let metaGlobal = Service.recordManager.get(engine.metaURL);
     do_check_eq(metaGlobal.payload.engines, undefined);
     do_check_true(!!collection.payload("flying"));
     do_check_true(!!collection.payload("scotsman"));
     engine.lastSync = Date.now() / 1000;
     engine.lastSyncLocal = Date.now();
     // Trying to prompt a wipe -- we no longer track CryptoMeta per engine,
     // so it has nothing to check.
     engine._syncStartup();
     // The meta/global WBO has been filled with data about the engine
     let engineData = metaGlobal.payload.engines["rotary"];
     do_check_eq(engineData.version, engine.version);
     do_check_eq(engineData.syncID, engine.syncID);
     // Sync was reset and server data was wiped
     do_check_eq(engine.lastSync, 0);
     do_check_eq(collection.payload("flying"), undefined);
     do_check_eq(collection.payload("scotsman"), undefined);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_syncStartup_serverHasNewerVersion() {
   _("SyncEngine._syncStartup ");
   let global = new ServerWBO('global', {engines: {rotary: {version: 23456}}});
   let server = httpd_setup({
       "/1.1/foo/storage/meta/global": global.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   Service.identity.username = "foo";
   let engine = makeRotaryEngine();
   try {
     // The server has a newer version of the data and our engine can
     // handle.  That should give us an exception.
     let error;
     try {
       engine._syncStartup();
     } catch (ex) {
       error = ex;
     }
     do_check_eq(error.failureCode, VERSION_OUT_OF_DATE);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_syncStartup_syncIDMismatchResetsClient() {
   _("SyncEngine._syncStartup resets sync if syncIDs don't match");
   let server = sync_httpd_setup({});
   let syncTesting = new SyncTestingInfrastructure(server);
   Service.identity.username = "foo";
   // global record with a different syncID than our engine has
   let engine = makeRotaryEngine();
   let global = new ServerWBO('global',
                              {engines: {rotary: {version: engine.version,
                                                 syncID: 'foobar'}}});
   server.registerPathHandler("/1.1/foo/storage/meta/global", global.handler());
   try {
     // Confirm initial environment
     do_check_eq(engine.syncID, 'fake-guid-0');
     do_check_eq(engine._tracker.changedIDs["rekolok"], undefined);
     engine.lastSync = Date.now() / 1000;
     engine.lastSyncLocal = Date.now();
     engine._syncStartup();
     // The engine has assumed the server's syncID
     do_check_eq(engine.syncID, 'foobar');
     // Sync was reset
     do_check_eq(engine.lastSync, 0);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_emptyServer() {
   _("SyncEngine._processIncoming working with an empty server backend");
   let collection = new ServerCollection();
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   Service.identity.username = "foo";
   let engine = makeRotaryEngine();
   try {
     // Merely ensure that this code path is run without any errors
     engine._processIncoming();
     do_check_eq(engine.lastSync, 0);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_createFromServer() {
   _("SyncEngine._processIncoming creates new records from server data");
   // Some server records that will be downloaded
   let collection = new ServerCollection();
   collection.insert('flying',
                     encryptPayload({id: 'flying',
                                     denomination: "LNER Class A3 4472"}));
   collection.insert('scotsman',
                     encryptPayload({id: 'scotsman',
                                     denomination: "Flying Scotsman"}));
   // Two pathological cases involving relative URIs gone wrong.
   let pathologicalPayload = encryptPayload({id: '../pathological',
                                             denomination: "Pathological Case"});
   collection.insert('../pathological', pathologicalPayload);
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler(),
       "/1.1/foo/storage/rotary/flying": collection.wbo("flying").handler(),
       "/1.1/foo/storage/rotary/scotsman": collection.wbo("scotsman").handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   Service.identity.username = "foo";
   generateNewKeys(Service.collectionKeys);
   let engine = makeRotaryEngine();
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment
     do_check_eq(engine.lastSync, 0);
     do_check_eq(engine.lastModified, null);
     do_check_eq(engine._store.items.flying, undefined);
     do_check_eq(engine._store.items.scotsman, undefined);
     do_check_eq(engine._store.items['../pathological'], undefined);
     engine._syncStartup();
     engine._processIncoming();
     // Timestamps of last sync and last server modification are set.
     do_check_true(engine.lastSync > 0);
     do_check_true(engine.lastModified > 0);
     // Local records have been created from the server data.
     do_check_eq(engine._store.items.flying, "LNER Class A3 4472");
     do_check_eq(engine._store.items.scotsman, "Flying Scotsman");
     do_check_eq(engine._store.items['../pathological'], "Pathological Case");
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_reconcile() {
   _("SyncEngine._processIncoming updates local records");
   let collection = new ServerCollection();
   // This server record is newer than the corresponding client one,
   // so it'll update its data.
   collection.insert('newrecord',
                     encryptPayload({id: 'newrecord',
                                     denomination: "New stuff..."}));
   // This server record is newer than the corresponding client one,
   // so it'll update its data.
   collection.insert('newerserver',
                     encryptPayload({id: 'newerserver',
                                     denomination: "New data!"}));
   // This server record is 2 mins older than the client counterpart
   // but identical to it, so we're expecting the client record's
   // changedID to be reset.
   collection.insert('olderidentical',
                     encryptPayload({id: 'olderidentical',
                                     denomination: "Older but identical"}));
   collection._wbos.olderidentical.modified -= 120;
   // This item simply has different data than the corresponding client
   // record (which is unmodified), so it will update the client as well
   collection.insert('updateclient',
                     encryptPayload({id: 'updateclient',
                                     denomination: "Get this!"}));
   // This is a dupe of 'original'.
   collection.insert('duplication',
                     encryptPayload({id: 'duplication',
                                     denomination: "Original Entry"}));
   // This record is marked as deleted, so we're expecting the client
   // record to be removed.
   collection.insert('nukeme',
                     encryptPayload({id: 'nukeme',
                                     denomination: "Nuke me!",
                                     deleted: true}));
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   Service.identity.username = "foo";
   let engine = makeRotaryEngine();
   engine._store.items = {newerserver: "New data, but not as new as server!",
                          olderidentical: "Older but identical",
                          updateclient: "Got data?",
                          original: "Original Entry",
                          long_original: "Long Original Entry",
                          nukeme: "Nuke me!"};
   // Make this record 1 min old, thus older than the one on the server
   engine._tracker.addChangedID('newerserver', Date.now()/1000 - 60);
   // This record has been changed 2 mins later than the one on the server
   engine._tracker.addChangedID('olderidentical', Date.now()/1000);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment
     do_check_eq(engine._store.items.newrecord, undefined);
     do_check_eq(engine._store.items.newerserver, "New data, but not as new as server!");
     do_check_eq(engine._store.items.olderidentical, "Older but identical");
     do_check_eq(engine._store.items.updateclient, "Got data?");
     do_check_eq(engine._store.items.nukeme, "Nuke me!");
     do_check_true(engine._tracker.changedIDs['olderidentical'] > 0);
     engine._syncStartup();
     engine._processIncoming();
     // Timestamps of last sync and last server modification are set.
     do_check_true(engine.lastSync > 0);
     do_check_true(engine.lastModified > 0);
     // The new record is created.
     do_check_eq(engine._store.items.newrecord, "New stuff...");
     // The 'newerserver' record is updated since the server data is newer.
     do_check_eq(engine._store.items.newerserver, "New data!");
     // The data for 'olderidentical' is identical on the server, so
     // it's no longer marked as changed anymore.
     do_check_eq(engine._store.items.olderidentical, "Older but identical");
     do_check_eq(engine._tracker.changedIDs['olderidentical'], undefined);
     // Updated with server data.
     do_check_eq(engine._store.items.updateclient, "Get this!");
     // The incoming ID is preferred.
     do_check_eq(engine._store.items.original, undefined);
     do_check_eq(engine._store.items.duplication, "Original Entry");
     do_check_neq(engine._delete.ids.indexOf("original"), -1);
     // The 'nukeme' record marked as deleted is removed.
     do_check_eq(engine._store.items.nukeme, undefined);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_reconcile_local_deleted() {
   _("Ensure local, duplicate ID is deleted on server.");
   // When a duplicate is resolved, the local ID (which is never taken) should
   // be deleted on the server.
   let [engine, server, user] = createServerAndConfigureClient();
   let now = Date.now() / 1000 - 10;
   engine.lastSync = now;
   engine.lastModified = now + 1;
   let record = encryptPayload({id: "DUPE_INCOMING", denomination: "incoming"});
   let wbo = new ServerWBO("DUPE_INCOMING", record, now + 2);
   server.insertWBO(user, "rotary", wbo);
   let record = encryptPayload({id: "DUPE_LOCAL", denomination: "local"});
   let wbo = new ServerWBO("DUPE_LOCAL", record, now - 1);
   server.insertWBO(user, "rotary", wbo);
   engine._store.create({id: "DUPE_LOCAL", denomination: "local"});
   do_check_true(engine._store.itemExists("DUPE_LOCAL"));
   do_check_eq("DUPE_LOCAL", engine._findDupe({id: "DUPE_INCOMING"}));
   engine._sync();
   do_check_attribute_count(engine._store.items, 1);
   do_check_true("DUPE_INCOMING" in engine._store.items);
   let collection = server.getCollection(user, "rotary");
   do_check_eq(1, collection.count());
   do_check_neq(undefined, collection.wbo("DUPE_INCOMING"));
   cleanAndGo(server);
 });
 add_test(function test_processIncoming_reconcile_equivalent() {
   _("Ensure proper handling of incoming records that match local.");
   let [engine, server, user] = createServerAndConfigureClient();
   let now = Date.now() / 1000 - 10;
   engine.lastSync = now;
   engine.lastModified = now + 1;
   let record = encryptPayload({id: "entry", denomination: "denomination"});
   let wbo = new ServerWBO("entry", record, now + 2);
   server.insertWBO(user, "rotary", wbo);
   engine._store.items = {entry: "denomination"};
   do_check_true(engine._store.itemExists("entry"));
   engine._sync();
   do_check_attribute_count(engine._store.items, 1);
   cleanAndGo(server);
 });
 add_test(function test_processIncoming_reconcile_locally_deleted_dupe_new() {
   _("Ensure locally deleted duplicate record newer than incoming is handled.");
   // This is a somewhat complicated test. It ensures that if a client receives
   // a modified record for an item that is deleted locally but with a different
   // ID that the incoming record is ignored. This is a corner case for record
   // handling, but it needs to be supported.
   let [engine, server, user] = createServerAndConfigureClient();
   let now = Date.now() / 1000 - 10;
   engine.lastSync = now;
   engine.lastModified = now + 1;
   let record = encryptPayload({id: "DUPE_INCOMING", denomination: "incoming"});
   let wbo = new ServerWBO("DUPE_INCOMING", record, now + 2);
   server.insertWBO(user, "rotary", wbo);
   // Simulate a locally-deleted item.
   engine._store.items = {};
   engine._tracker.addChangedID("DUPE_LOCAL", now + 3);
   do_check_false(engine._store.itemExists("DUPE_LOCAL"));
   do_check_false(engine._store.itemExists("DUPE_INCOMING"));
   do_check_eq("DUPE_LOCAL", engine._findDupe({id: "DUPE_INCOMING"}));
   engine._sync();
   // After the sync, the server's payload for the original ID should be marked
   // as deleted.
   do_check_empty(engine._store.items);
   let collection = server.getCollection(user, "rotary");
   do_check_eq(1, collection.count());
   let wbo = collection.wbo("DUPE_INCOMING");
   do_check_neq(null, wbo);
   let payload = JSON.parse(JSON.parse(wbo.payload).ciphertext);
   do_check_true(payload.deleted);
   cleanAndGo(server);
 });
 add_test(function test_processIncoming_reconcile_locally_deleted_dupe_old() {
   _("Ensure locally deleted duplicate record older than incoming is restored.");
   // This is similar to the above test except it tests the condition where the
   // incoming record is newer than the local deletion, therefore overriding it.
   let [engine, server, user] = createServerAndConfigureClient();
   let now = Date.now() / 1000 - 10;
   engine.lastSync = now;
   engine.lastModified = now + 1;
   let record = encryptPayload({id: "DUPE_INCOMING", denomination: "incoming"});
   let wbo = new ServerWBO("DUPE_INCOMING", record, now + 2);
   server.insertWBO(user, "rotary", wbo);
   // Simulate a locally-deleted item.
   engine._store.items = {};
   engine._tracker.addChangedID("DUPE_LOCAL", now + 1);
   do_check_false(engine._store.itemExists("DUPE_LOCAL"));
   do_check_false(engine._store.itemExists("DUPE_INCOMING"));
   do_check_eq("DUPE_LOCAL", engine._findDupe({id: "DUPE_INCOMING"}));
   engine._sync();
   // Since the remote change is newer, the incoming item should exist locally.
   do_check_attribute_count(engine._store.items, 1);
   do_check_true("DUPE_INCOMING" in engine._store.items);
   do_check_eq("incoming", engine._store.items.DUPE_INCOMING);
   let collection = server.getCollection(user, "rotary");
   do_check_eq(1, collection.count());
   let wbo = collection.wbo("DUPE_INCOMING");
   let payload = JSON.parse(JSON.parse(wbo.payload).ciphertext);
   do_check_eq("incoming", payload.denomination);
   cleanAndGo(server);
 });
 add_test(function test_processIncoming_reconcile_changed_dupe() {
   _("Ensure that locally changed duplicate record is handled properly.");
   let [engine, server, user] = createServerAndConfigureClient();
   let now = Date.now() / 1000 - 10;
   engine.lastSync = now;
   engine.lastModified = now + 1;
   // The local record is newer than the incoming one, so it should be retained.
   let record = encryptPayload({id: "DUPE_INCOMING", denomination: "incoming"});
   let wbo = new ServerWBO("DUPE_INCOMING", record, now + 2);
   server.insertWBO(user, "rotary", wbo);
   engine._store.create({id: "DUPE_LOCAL", denomination: "local"});
   engine._tracker.addChangedID("DUPE_LOCAL", now + 3);
   do_check_true(engine._store.itemExists("DUPE_LOCAL"));
   do_check_eq("DUPE_LOCAL", engine._findDupe({id: "DUPE_INCOMING"}));
   engine._sync();
   // The ID should have been changed to incoming.
   do_check_attribute_count(engine._store.items, 1);
   do_check_true("DUPE_INCOMING" in engine._store.items);
   // On the server, the local ID should be deleted and the incoming ID should
   // have its payload set to what was in the local record.
   let collection = server.getCollection(user, "rotary");
   do_check_eq(1, collection.count());
   let wbo = collection.wbo("DUPE_INCOMING");
   do_check_neq(undefined, wbo);
   let payload = JSON.parse(JSON.parse(wbo.payload).ciphertext);
   do_check_eq("local", payload.denomination);
   cleanAndGo(server);
 });
 add_test(function test_processIncoming_reconcile_changed_dupe_new() {
   _("Ensure locally changed duplicate record older than incoming is ignored.");
   // This test is similar to the above except the incoming record is younger
   // than the local record. The incoming record should be authoritative.
   let [engine, server, user] = createServerAndConfigureClient();
   let now = Date.now() / 1000 - 10;
   engine.lastSync = now;
   engine.lastModified = now + 1;
   let record = encryptPayload({id: "DUPE_INCOMING", denomination: "incoming"});
   let wbo = new ServerWBO("DUPE_INCOMING", record, now + 2);
   server.insertWBO(user, "rotary", wbo);
   engine._store.create({id: "DUPE_LOCAL", denomination: "local"});
   engine._tracker.addChangedID("DUPE_LOCAL", now + 1);
   do_check_true(engine._store.itemExists("DUPE_LOCAL"));
   do_check_eq("DUPE_LOCAL", engine._findDupe({id: "DUPE_INCOMING"}));
   engine._sync();
   // The ID should have been changed to incoming.
   do_check_attribute_count(engine._store.items, 1);
   do_check_true("DUPE_INCOMING" in engine._store.items);
   // On the server, the local ID should be deleted and the incoming ID should
   // have its payload retained.
   let collection = server.getCollection(user, "rotary");
   do_check_eq(1, collection.count());
   let wbo = collection.wbo("DUPE_INCOMING");
   do_check_neq(undefined, wbo);
   let payload = JSON.parse(JSON.parse(wbo.payload).ciphertext);
   do_check_eq("incoming", payload.denomination);
   cleanAndGo(server);
 });
 add_test(function test_processIncoming_mobile_batchSize() {
   _("SyncEngine._processIncoming doesn't fetch everything at once on mobile clients");
   Svc.Prefs.set("client.type", "mobile");
   Service.identity.username = "foo";
   // A collection that logs each GET
   let collection = new ServerCollection();
   collection.get_log = [];
   collection._get = collection.get;
   collection.get = function (options) {
     this.get_log.push(options);
     return this._get(options);
   };
   // Let's create some 234 server side records. They're all at least
   // 10 minutes old.
   for (let i = 0; i < 234; i++) {
     let id = 'record-no-' + i;
     let payload = encryptPayload({id: id, denomination: "Record No. " + i});
     let wbo = new ServerWBO(id, payload);
     wbo.modified = Date.now()/1000 - 60*(i+10);
     collection.insertWBO(wbo);
   }
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let engine = makeRotaryEngine();
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     _("On a mobile client, we get new records from the server in batches of 50.");
     engine._syncStartup();
     engine._processIncoming();
     do_check_attribute_count(engine._store.items, 234);
     do_check_true('record-no-0' in engine._store.items);
     do_check_true('record-no-49' in engine._store.items);
     do_check_true('record-no-50' in engine._store.items);
     do_check_true('record-no-233' in engine._store.items);
     // Verify that the right number of GET requests with the right
     // kind of parameters were made.
     do_check_eq(collection.get_log.length,
                 Math.ceil(234 / MOBILE_BATCH_SIZE) + 1);
     do_check_eq(collection.get_log[0].full, 1);
     do_check_eq(collection.get_log[0].limit, MOBILE_BATCH_SIZE);
     do_check_eq(collection.get_log[1].full, undefined);
     do_check_eq(collection.get_log[1].limit, undefined);
     for (let i = 1; i <= Math.floor(234 / MOBILE_BATCH_SIZE); i++) {
       do_check_eq(collection.get_log[i+1].full, 1);
       do_check_eq(collection.get_log[i+1].limit, undefined);
       if (i < Math.floor(234 / MOBILE_BATCH_SIZE))
         do_check_eq(collection.get_log[i+1].ids.length, MOBILE_BATCH_SIZE);
       else
         do_check_eq(collection.get_log[i+1].ids.length, 234 % MOBILE_BATCH_SIZE);
     }
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_store_toFetch() {
   _("If processIncoming fails in the middle of a batch on mobile, state is saved in toFetch and lastSync.");
   Service.identity.username = "foo";
   Svc.Prefs.set("client.type", "mobile");
   // A collection that throws at the fourth get.
   let collection = new ServerCollection();
   collection._get_calls = 0;
   collection._get = collection.get;
   collection.get = function() {
     this._get_calls += 1;
     if (this._get_calls > 3) {
       throw "Abort on fourth call!";
     }
     return this._get.apply(this, arguments);
   };
   // Let's create three batches worth of server side records.
   for (var i = 0; i < MOBILE_BATCH_SIZE * 3; i++) {
     let id = 'record-no-' + i;
     let payload = encryptPayload({id: id, denomination: "Record No. " + id});
     let wbo = new ServerWBO(id, payload);
     wbo.modified = Date.now()/1000 + 60 * (i - MOBILE_BATCH_SIZE * 3);
     collection.insertWBO(wbo);
   }
   let engine = makeRotaryEngine();
   engine.enabled = true;
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment
     do_check_eq(engine.lastSync, 0);
     do_check_empty(engine._store.items);
     let error;
     try {
       engine.sync();
     } catch (ex) {
       error = ex;
     }
     do_check_true(!!error);
     // Only the first two batches have been applied.
     do_check_eq(Object.keys(engine._store.items).length,
                 MOBILE_BATCH_SIZE * 2);
     // The third batch is stuck in toFetch. lastSync has been moved forward to
     // the last successful item's timestamp.
     do_check_eq(engine.toFetch.length, MOBILE_BATCH_SIZE);
     do_check_eq(engine.lastSync, collection.wbo("record-no-99").modified);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_resume_toFetch() {
   _("toFetch and previousFailed items left over from previous syncs are fetched on the next sync, along with new items.");
   Service.identity.username = "foo";
   const LASTSYNC = Date.now() / 1000;
   // Server records that will be downloaded
   let collection = new ServerCollection();
   collection.insert('flying',
                     encryptPayload({id: 'flying',
                                     denomination: "LNER Class A3 4472"}));
   collection.insert('scotsman',
                     encryptPayload({id: 'scotsman',
                                     denomination: "Flying Scotsman"}));
   collection.insert('rekolok',
                     encryptPayload({id: 'rekolok',
                                     denomination: "Rekonstruktionslokomotive"}));
   for (let i = 0; i < 3; i++) {
     let id = 'failed' + i;
     let payload = encryptPayload({id: id, denomination: "Record No. " + i});
     let wbo = new ServerWBO(id, payload);
     wbo.modified = LASTSYNC - 10;
     collection.insertWBO(wbo);
   }
   collection.wbo("flying").modified =
     collection.wbo("scotsman").modified = LASTSYNC - 10;
   collection._wbos.rekolok.modified = LASTSYNC + 10;
   // Time travel 10 seconds into the future but still download the above WBOs.
   let engine = makeRotaryEngine();
   engine.lastSync = LASTSYNC;
   engine.toFetch = ["flying", "scotsman"];
   engine.previousFailed = ["failed0", "failed1", "failed2"];
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment
     do_check_eq(engine._store.items.flying, undefined);
     do_check_eq(engine._store.items.scotsman, undefined);
     do_check_eq(engine._store.items.rekolok, undefined);
     engine._syncStartup();
     engine._processIncoming();
     // Local records have been created from the server data.
     do_check_eq(engine._store.items.flying, "LNER Class A3 4472");
     do_check_eq(engine._store.items.scotsman, "Flying Scotsman");
     do_check_eq(engine._store.items.rekolok, "Rekonstruktionslokomotive");
     do_check_eq(engine._store.items.failed0, "Record No. 0");
     do_check_eq(engine._store.items.failed1, "Record No. 1");
     do_check_eq(engine._store.items.failed2, "Record No. 2");
     do_check_eq(engine.previousFailed.length, 0);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_applyIncomingBatchSize_smaller() {
   _("Ensure that a number of incoming items less than applyIncomingBatchSize is still applied.");
   Service.identity.username = "foo";
   // Engine that doesn't like the first and last record it's given.
   const APPLY_BATCH_SIZE = 10;
   let engine = makeRotaryEngine();
   engine.applyIncomingBatchSize = APPLY_BATCH_SIZE;
   engine._store._applyIncomingBatch = engine._store.applyIncomingBatch;
   engine._store.applyIncomingBatch = function (records) {
     let failed1 = records.shift();
     let failed2 = records.pop();
     this._applyIncomingBatch(records);
     return [failed1.id, failed2.id];
   };
   // Let's create less than a batch worth of server side records.
   let collection = new ServerCollection();
   for (let i = 0; i < APPLY_BATCH_SIZE - 1; i++) {
     let id = 'record-no-' + i;
     let payload = encryptPayload({id: id, denomination: "Record No. " + id});
     collection.insert(id, payload);
   }
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment
     do_check_empty(engine._store.items);
     engine._syncStartup();
     engine._processIncoming();
     // Records have been applied and the expected failures have failed.
     do_check_attribute_count(engine._store.items, APPLY_BATCH_SIZE - 1 - 2);
     do_check_eq(engine.toFetch.length, 0);
     do_check_eq(engine.previousFailed.length, 2);
     do_check_eq(engine.previousFailed[0], "record-no-0");
     do_check_eq(engine.previousFailed[1], "record-no-8");
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_applyIncomingBatchSize_multiple() {
   _("Ensure that incoming items are applied according to applyIncomingBatchSize.");
   Service.identity.username = "foo";
   const APPLY_BATCH_SIZE = 10;
   // Engine that applies records in batches.
   let engine = makeRotaryEngine();
   engine.applyIncomingBatchSize = APPLY_BATCH_SIZE;
   let batchCalls = 0;
   engine._store._applyIncomingBatch = engine._store.applyIncomingBatch;
   engine._store.applyIncomingBatch = function (records) {
     batchCalls += 1;
     do_check_eq(records.length, APPLY_BATCH_SIZE);
     this._applyIncomingBatch.apply(this, arguments);
   };
   // Let's create three batches worth of server side records.
   let collection = new ServerCollection();
   for (let i = 0; i < APPLY_BATCH_SIZE * 3; i++) {
     let id = 'record-no-' + i;
     let payload = encryptPayload({id: id, denomination: "Record No. " + id});
     collection.insert(id, payload);
   }
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment
     do_check_empty(engine._store.items);
     engine._syncStartup();
     engine._processIncoming();
     // Records have been applied in 3 batches.
     do_check_eq(batchCalls, 3);
     do_check_attribute_count(engine._store.items, APPLY_BATCH_SIZE * 3);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_notify_count() {
   _("Ensure that failed records are reported only once.");
   Service.identity.username = "foo";
   const APPLY_BATCH_SIZE = 5;
   const NUMBER_OF_RECORDS = 15;
   // Engine that fails the first record.
   let engine = makeRotaryEngine();
   engine.applyIncomingBatchSize = APPLY_BATCH_SIZE;
   engine._store._applyIncomingBatch = engine._store.applyIncomingBatch;
   engine._store.applyIncomingBatch = function (records) {
     engine._store._applyIncomingBatch(records.slice(1));
     return [records[0].id];
   };
   // Create a batch of server side records.
   let collection = new ServerCollection();
   for (var i = 0; i < NUMBER_OF_RECORDS; i++) {
     let id = 'record-no-' + i;
     let payload = encryptPayload({id: id, denomination: "Record No. " + id});
     collection.insert(id, payload);
   }
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment.
     do_check_eq(engine.lastSync, 0);
     do_check_eq(engine.toFetch.length, 0);
     do_check_eq(engine.previousFailed.length, 0);
     do_check_empty(engine._store.items);
     let called = 0;
     let counts;
     function onApplied(count) {
       _("Called with " + JSON.stringify(counts));
       counts = count;
       called++;
     }
     Svc.Obs.add("weave:engine:sync:applied", onApplied);
     // Do sync.
     engine._syncStartup();
     engine._processIncoming();
     // Confirm failures.
     do_check_attribute_count(engine._store.items, 12);
     do_check_eq(engine.previousFailed.length, 3);
     do_check_eq(engine.previousFailed[0], "record-no-0");
     do_check_eq(engine.previousFailed[1], "record-no-5");
     do_check_eq(engine.previousFailed[2], "record-no-10");
     // There are newly failed records and they are reported.
     do_check_eq(called, 1);
     do_check_eq(counts.failed, 3);
     do_check_eq(counts.applied, 15);
     do_check_eq(counts.newFailed, 3);
     do_check_eq(counts.succeeded, 12);
     // Sync again, 1 of the failed items are the same, the rest didn't fail.
     engine._processIncoming();
     // Confirming removed failures.
     do_check_attribute_count(engine._store.items, 14);
     do_check_eq(engine.previousFailed.length, 1);
     do_check_eq(engine.previousFailed[0], "record-no-0");
     do_check_eq(called, 2);
     do_check_eq(counts.failed, 1);
     do_check_eq(counts.applied, 3);
     do_check_eq(counts.newFailed, 0);
     do_check_eq(counts.succeeded, 2);
     Svc.Obs.remove("weave:engine:sync:applied", onApplied);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_previousFailed() {
   _("Ensure that failed records are retried.");
   Service.identity.username = "foo";
   Svc.Prefs.set("client.type", "mobile");
   const APPLY_BATCH_SIZE = 4;
   const NUMBER_OF_RECORDS = 14;
   // Engine that fails the first 2 records.
   let engine = makeRotaryEngine();
   engine.mobileGUIDFetchBatchSize = engine.applyIncomingBatchSize = APPLY_BATCH_SIZE;
   engine._store._applyIncomingBatch = engine._store.applyIncomingBatch;
   engine._store.applyIncomingBatch = function (records) {
     engine._store._applyIncomingBatch(records.slice(2));
     return [records[0].id, records[1].id];
   };
   // Create a batch of server side records.
   let collection = new ServerCollection();
   for (var i = 0; i < NUMBER_OF_RECORDS; i++) {
     let id = 'record-no-' + i;
     let payload = encryptPayload({id: id, denomination: "Record No. " + i});
     collection.insert(id, payload);
   }
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment.
     do_check_eq(engine.lastSync, 0);
     do_check_eq(engine.toFetch.length, 0);
     do_check_eq(engine.previousFailed.length, 0);
     do_check_empty(engine._store.items);
     // Initial failed items in previousFailed to be reset.
     let previousFailed = [Utils.makeGUID(), Utils.makeGUID(), Utils.makeGUID()];
     engine.previousFailed = previousFailed;
     do_check_eq(engine.previousFailed, previousFailed);
     // Do sync.
     engine._syncStartup();
     engine._processIncoming();
     // Expected result: 4 sync batches with 2 failures each => 8 failures
     do_check_attribute_count(engine._store.items, 6);
     do_check_eq(engine.previousFailed.length, 8);
     do_check_eq(engine.previousFailed[0], "record-no-0");
     do_check_eq(engine.previousFailed[1], "record-no-1");
     do_check_eq(engine.previousFailed[2], "record-no-4");
     do_check_eq(engine.previousFailed[3], "record-no-5");
     do_check_eq(engine.previousFailed[4], "record-no-8");
     do_check_eq(engine.previousFailed[5], "record-no-9");
     do_check_eq(engine.previousFailed[6], "record-no-12");
     do_check_eq(engine.previousFailed[7], "record-no-13");
     // Sync again with the same failed items (records 0, 1, 8, 9).
     engine._processIncoming();
     // A second sync with the same failed items should not add the same items again.
     // Items that did not fail a second time should no longer be in previousFailed.
     do_check_attribute_count(engine._store.items, 10);
     do_check_eq(engine.previousFailed.length, 4);
     do_check_eq(engine.previousFailed[0], "record-no-0");
     do_check_eq(engine.previousFailed[1], "record-no-1");
     do_check_eq(engine.previousFailed[2], "record-no-8");
     do_check_eq(engine.previousFailed[3], "record-no-9");
     // Refetched items that didn't fail the second time are in engine._store.items.
     do_check_eq(engine._store.items['record-no-4'], "Record No. 4");
     do_check_eq(engine._store.items['record-no-5'], "Record No. 5");
     do_check_eq(engine._store.items['record-no-12'], "Record No. 12");
     do_check_eq(engine._store.items['record-no-13'], "Record No. 13");
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_failed_records() {
   _("Ensure that failed records from _reconcile and applyIncomingBatch are refetched.");
   Service.identity.username = "foo";
   // Let's create three and a bit batches worth of server side records.
   let collection = new ServerCollection();
   const NUMBER_OF_RECORDS = MOBILE_BATCH_SIZE * 3 + 5;
   for (let i = 0; i < NUMBER_OF_RECORDS; i++) {
     let id = 'record-no-' + i;
     let payload = encryptPayload({id: id, denomination: "Record No. " + id});
     let wbo = new ServerWBO(id, payload);
     wbo.modified = Date.now()/1000 + 60 * (i - MOBILE_BATCH_SIZE * 3);
     collection.insertWBO(wbo);
   }
   // Engine that batches but likes to throw on a couple of records,
   // two in each batch: the even ones fail in reconcile, the odd ones
   // in applyIncoming.
   const BOGUS_RECORDS = ["record-no-" + 42,
                          "record-no-" + 23,
                          "record-no-" + (42 + MOBILE_BATCH_SIZE),
                          "record-no-" + (23 + MOBILE_BATCH_SIZE),
                          "record-no-" + (42 + MOBILE_BATCH_SIZE * 2),
                          "record-no-" + (23 + MOBILE_BATCH_SIZE * 2),
                          "record-no-" + (2 + MOBILE_BATCH_SIZE * 3),
                          "record-no-" + (1 + MOBILE_BATCH_SIZE * 3)];
   let engine = makeRotaryEngine();
   engine.applyIncomingBatchSize = MOBILE_BATCH_SIZE;
   engine.__reconcile = engine._reconcile;
   engine._reconcile = function _reconcile(record) {
     if (BOGUS_RECORDS.indexOf(record.id) % 2 == 0) {
       throw "I don't like this record! Baaaaaah!";
     }
     return this.__reconcile.apply(this, arguments);
   };
   engine._store._applyIncoming = engine._store.applyIncoming;
   engine._store.applyIncoming = function (record) {
     if (BOGUS_RECORDS.indexOf(record.id) % 2 == 1) {
       throw "I don't like this record! Baaaaaah!";
     }
     return this._applyIncoming.apply(this, arguments);
   };
   // Keep track of requests made of a collection.
   let count = 0;
   let uris  = [];
   function recording_handler(collection) {
     let h = collection.handler();
     return function(req, res) {
       ++count;
       uris.push(req.path + "?" + req.queryString);
       return h(req, res);
     };
   }
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": recording_handler(collection)
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment
     do_check_eq(engine.lastSync, 0);
     do_check_eq(engine.toFetch.length, 0);
     do_check_eq(engine.previousFailed.length, 0);
     do_check_empty(engine._store.items);
     let observerSubject;
     let observerData;
     Svc.Obs.add("weave:engine:sync:applied", function onApplied(subject, data) {
       Svc.Obs.remove("weave:engine:sync:applied", onApplied);
       observerSubject = subject;
       observerData = data;
     });
     engine._syncStartup();
     engine._processIncoming();
     // Ensure that all records but the bogus 4 have been applied.
     do_check_attribute_count(engine._store.items,
                              NUMBER_OF_RECORDS - BOGUS_RECORDS.length);
     // Ensure that the bogus records will be fetched again on the next sync.
     do_check_eq(engine.previousFailed.length, BOGUS_RECORDS.length);
     engine.previousFailed.sort();
     BOGUS_RECORDS.sort();
     for (let i = 0; i < engine.previousFailed.length; i++) {
       do_check_eq(engine.previousFailed[i], BOGUS_RECORDS[i]);
     }
     // Ensure the observer was notified
     do_check_eq(observerData, engine.name);
     do_check_eq(observerSubject.failed, BOGUS_RECORDS.length);
     do_check_eq(observerSubject.newFailed, BOGUS_RECORDS.length);
     // Testing batching of failed item fetches.
     // Try to sync again. Ensure that we split the request into chunks to avoid
     // URI length limitations.
     function batchDownload(batchSize) {
       count = 0;
       uris  = [];
       engine.guidFetchBatchSize = batchSize;
       engine._processIncoming();
       _("Tried again. Requests: " + count + "; URIs: " + JSON.stringify(uris));
       return count;
     }
     // There are 8 bad records, so this needs 3 fetches.
     _("Test batching with ID batch size 3, normal mobile batch size.");
     do_check_eq(batchDownload(3), 3);
     // Now see with a more realistic limit.
     _("Test batching with sufficient ID batch size.");
     do_check_eq(batchDownload(BOGUS_RECORDS.length), 1);
     // If we're on mobile, that limit is used by default.
     _("Test batching with tiny mobile batch size.");
     Svc.Prefs.set("client.type", "mobile");
     engine.mobileGUIDFetchBatchSize = 2;
     do_check_eq(batchDownload(BOGUS_RECORDS.length), 4);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_processIncoming_decrypt_failed() {
   _("Ensure that records failing to decrypt are either replaced or refetched.");
   Service.identity.username = "foo";
   // Some good and some bogus records. One doesn't contain valid JSON,
   // the other will throw during decrypt.
   let collection = new ServerCollection();
   collection._wbos.flying = new ServerWBO(
       'flying', encryptPayload({id: 'flying',
                                 denomination: "LNER Class A3 4472"}));
   collection._wbos.nojson = new ServerWBO("nojson", "This is invalid JSON");
   collection._wbos.nojson2 = new ServerWBO("nojson2", "This is invalid JSON");
   collection._wbos.scotsman = new ServerWBO(
       'scotsman', encryptPayload({id: 'scotsman',
                                   denomination: "Flying Scotsman"}));
   collection._wbos.nodecrypt = new ServerWBO("nodecrypt", "Decrypt this!");
   collection._wbos.nodecrypt2 = new ServerWBO("nodecrypt2", "Decrypt this!");
   // Patch the fake crypto service to throw on the record above.
   Svc.Crypto._decrypt = Svc.Crypto.decrypt;
   Svc.Crypto.decrypt = function (ciphertext) {
     if (ciphertext == "Decrypt this!") {
       throw "Derp! Cipher finalized failed. Im ur crypto destroyin ur recordz.";
     }
     return this._decrypt.apply(this, arguments);
   };
   // Some broken records also exist locally.
   let engine = makeRotaryEngine();
   engine.enabled = true;
   engine._store.items = {nojson: "Valid JSON",
                          nodecrypt: "Valid ciphertext"};
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial state
     do_check_eq(engine.toFetch.length, 0);
     do_check_eq(engine.previousFailed.length, 0);
     let observerSubject;
     let observerData;
     Svc.Obs.add("weave:engine:sync:applied", function onApplied(subject, data) {
       Svc.Obs.remove("weave:engine:sync:applied", onApplied);
       observerSubject = subject;
       observerData = data;
     });
     engine.lastSync = collection.wbo("nojson").modified - 1;
     engine.sync();
     do_check_eq(engine.previousFailed.length, 4);
     do_check_eq(engine.previousFailed[0], "nojson");
     do_check_eq(engine.previousFailed[1], "nojson2");
     do_check_eq(engine.previousFailed[2], "nodecrypt");
     do_check_eq(engine.previousFailed[3], "nodecrypt2");
     // Ensure the observer was notified
     do_check_eq(observerData, engine.name);
     do_check_eq(observerSubject.applied, 2);
     do_check_eq(observerSubject.failed, 4);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_uploadOutgoing_toEmptyServer() {
   _("SyncEngine._uploadOutgoing uploads new records to server");
   Service.identity.username = "foo";
   let collection = new ServerCollection();
   collection._wbos.flying = new ServerWBO('flying');
   collection._wbos.scotsman = new ServerWBO('scotsman');
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler(),
       "/1.1/foo/storage/rotary/flying": collection.wbo("flying").handler(),
       "/1.1/foo/storage/rotary/scotsman": collection.wbo("scotsman").handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   generateNewKeys(Service.collectionKeys);
   let engine = makeRotaryEngine();
   engine.lastSync = 123; // needs to be non-zero so that tracker is queried
   engine._store.items = {flying: "LNER Class A3 4472",
                          scotsman: "Flying Scotsman"};
   // Mark one of these records as changed
   engine._tracker.addChangedID('scotsman', 0);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment
     do_check_eq(engine.lastSyncLocal, 0);
     do_check_eq(collection.payload("flying"), undefined);
     do_check_eq(collection.payload("scotsman"), undefined);
     engine._syncStartup();
     engine._uploadOutgoing();
     // Local timestamp has been set.
     do_check_true(engine.lastSyncLocal > 0);
     // Ensure the marked record ('scotsman') has been uploaded and is
     // no longer marked.
     do_check_eq(collection.payload("flying"), undefined);
     do_check_true(!!collection.payload("scotsman"));
     do_check_eq(JSON.parse(collection.wbo("scotsman").data.ciphertext).id,
                 "scotsman");
     do_check_eq(engine._tracker.changedIDs["scotsman"], undefined);
     // The 'flying' record wasn't marked so it wasn't uploaded
     do_check_eq(collection.payload("flying"), undefined);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_uploadOutgoing_failed() {
   _("SyncEngine._uploadOutgoing doesn't clear the tracker of objects that failed to upload.");
   Service.identity.username = "foo";
   let collection = new ServerCollection();
   // We only define the "flying" WBO on the server, not the "scotsman"
   // and "peppercorn" ones.
   collection._wbos.flying = new ServerWBO('flying');
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let engine = makeRotaryEngine();
   engine.lastSync = 123; // needs to be non-zero so that tracker is queried
   engine._store.items = {flying: "LNER Class A3 4472",
                          scotsman: "Flying Scotsman",
                          peppercorn: "Peppercorn Class"};
   // Mark these records as changed
   const FLYING_CHANGED = 12345;
   const SCOTSMAN_CHANGED = 23456;
   const PEPPERCORN_CHANGED = 34567;
   engine._tracker.addChangedID('flying', FLYING_CHANGED);
   engine._tracker.addChangedID('scotsman', SCOTSMAN_CHANGED);
   engine._tracker.addChangedID('peppercorn', PEPPERCORN_CHANGED);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     // Confirm initial environment
     do_check_eq(engine.lastSyncLocal, 0);
     do_check_eq(collection.payload("flying"), undefined);
     do_check_eq(engine._tracker.changedIDs['flying'], FLYING_CHANGED);
     do_check_eq(engine._tracker.changedIDs['scotsman'], SCOTSMAN_CHANGED);
     do_check_eq(engine._tracker.changedIDs['peppercorn'], PEPPERCORN_CHANGED);
     engine.enabled = true;
     engine.sync();
     // Local timestamp has been set.
     do_check_true(engine.lastSyncLocal > 0);
     // Ensure the 'flying' record has been uploaded and is no longer marked.
     do_check_true(!!collection.payload("flying"));
     do_check_eq(engine._tracker.changedIDs['flying'], undefined);
     // The 'scotsman' and 'peppercorn' records couldn't be uploaded so
     // they weren't cleared from the tracker.
     do_check_eq(engine._tracker.changedIDs['scotsman'], SCOTSMAN_CHANGED);
     do_check_eq(engine._tracker.changedIDs['peppercorn'], PEPPERCORN_CHANGED);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_uploadOutgoing_MAX_UPLOAD_RECORDS() {
   _("SyncEngine._uploadOutgoing uploads in batches of MAX_UPLOAD_RECORDS");
   Service.identity.username = "foo";
   let collection = new ServerCollection();
   // Let's count how many times the client posts to the server
   var noOfUploads = 0;
   collection.post = (function(orig) {
     return function() {
       noOfUploads++;
       return orig.apply(this, arguments);
     };
   }(collection.post));
   // Create a bunch of records (and server side handlers)
   let engine = makeRotaryEngine();
   for (var i = 0; i < 234; i++) {
     let id = 'record-no-' + i;
     engine._store.items[id] = "Record No. " + i;
     engine._tracker.addChangedID(id, 0);
     collection.insert(id);
   }
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   try {
     // Confirm initial environment.
     do_check_eq(noOfUploads, 0);
     engine._syncStartup();
     engine._uploadOutgoing();
     // Ensure all records have been uploaded.
     for (i = 0; i < 234; i++) {
       do_check_true(!!collection.payload('record-no-' + i));
     }
     // Ensure that the uploads were performed in batches of MAX_UPLOAD_RECORDS.
     do_check_eq(noOfUploads, Math.ceil(234/MAX_UPLOAD_RECORDS));
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_syncFinish_noDelete() {
   _("SyncEngine._syncFinish resets tracker's score");
   let server = httpd_setup({});
   let syncTesting = new SyncTestingInfrastructure(server);
   let engine = makeRotaryEngine();
   engine._delete = {}; // Nothing to delete
   engine._tracker.score = 100;
   // _syncFinish() will reset the engine's score.
   engine._syncFinish();
   do_check_eq(engine.score, 0);
   server.stop(run_next_test);
 });
 add_test(function test_syncFinish_deleteByIds() {
   _("SyncEngine._syncFinish deletes server records slated for deletion (list of record IDs).");
   Service.identity.username = "foo";
   let collection = new ServerCollection();
   collection._wbos.flying = new ServerWBO(
       'flying', encryptPayload({id: 'flying',
                                 denomination: "LNER Class A3 4472"}));
   collection._wbos.scotsman = new ServerWBO(
       'scotsman', encryptPayload({id: 'scotsman',
                                   denomination: "Flying Scotsman"}));
   collection._wbos.rekolok = new ServerWBO(
       'rekolok', encryptPayload({id: 'rekolok',
                                 denomination: "Rekonstruktionslokomotive"}));
   let server = httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let engine = makeRotaryEngine();
   try {
     engine._delete = {ids: ['flying', 'rekolok']};
     engine._syncFinish();
     // The 'flying' and 'rekolok' records were deleted while the
     // 'scotsman' one wasn't.
     do_check_eq(collection.payload("flying"), undefined);
     do_check_true(!!collection.payload("scotsman"));
     do_check_eq(collection.payload("rekolok"), undefined);
     // The deletion todo list has been reset.
     do_check_eq(engine._delete.ids, undefined);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_syncFinish_deleteLotsInBatches() {
   _("SyncEngine._syncFinish deletes server records in batches of 100 (list of record IDs).");
   Service.identity.username = "foo";
   let collection = new ServerCollection();
   // Let's count how many times the client does a DELETE request to the server
   var noOfUploads = 0;
   collection.delete = (function(orig) {
     return function() {
       noOfUploads++;
       return orig.apply(this, arguments);
     };
   }(collection.delete));
   // Create a bunch of records on the server
   let now = Date.now();
   for (var i = 0; i < 234; i++) {
     let id = 'record-no-' + i;
     let payload = encryptPayload({id: id, denomination: "Record No. " + i});
     let wbo = new ServerWBO(id, payload);
     wbo.modified = now / 1000 - 60 * (i + 110);
     collection.insertWBO(wbo);
   }
   let server = httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let engine = makeRotaryEngine();
   try {
     // Confirm initial environment
     do_check_eq(noOfUploads, 0);
     // Declare what we want to have deleted: all records no. 100 and
     // up and all records that are less than 200 mins old (which are
     // records 0 thru 90).
     engine._delete = {ids: [],
                       newer: now / 1000 - 60 * 200.5};
     for (i = 100; i < 234; i++) {
       engine._delete.ids.push('record-no-' + i);
     }
     engine._syncFinish();
     // Ensure that the appropriate server data has been wiped while
     // preserving records 90 thru 200.
     for (i = 0; i < 234; i++) {
       let id = 'record-no-' + i;
       if (i <= 90 || i >= 100) {
         do_check_eq(collection.payload(id), undefined);
       } else {
         do_check_true(!!collection.payload(id));
       }
     }
     // The deletion was done in batches
     do_check_eq(noOfUploads, 2 + 1);
     // The deletion todo list has been reset.
     do_check_eq(engine._delete.ids, undefined);
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_sync_partialUpload() {
   _("SyncEngine.sync() keeps changedIDs that couldn't be uploaded.");
   Service.identity.username = "foo";
   let collection = new ServerCollection();
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   generateNewKeys(Service.collectionKeys);
   let engine = makeRotaryEngine();
   engine.lastSync = 123; // needs to be non-zero so that tracker is queried
   engine.lastSyncLocal = 456;
   // Let the third upload fail completely
   var noOfUploads = 0;
   collection.post = (function(orig) {
     return function() {
       if (noOfUploads == 2)
         throw "FAIL!";
       noOfUploads++;
       return orig.apply(this, arguments);
     };
   }(collection.post));
   // Create a bunch of records (and server side handlers)
   for (let i = 0; i < 234; i++) {
     let id = 'record-no-' + i;
     engine._store.items[id] = "Record No. " + i;
     engine._tracker.addChangedID(id, i);
     // Let two items in the first upload batch fail.
     if ((i != 23) && (i != 42)) {
       collection.insert(id);
     }
   }
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   try {
     engine.enabled = true;
     let error;
     try {
       engine.sync();
     } catch (ex) {
       error = ex;
     }
     do_check_true(!!error);
     // The timestamp has been updated.
     do_check_true(engine.lastSyncLocal > 456);
     for (let i = 0; i < 234; i++) {
       let id = 'record-no-' + i;
       // Ensure failed records are back in the tracker:
       // * records no. 23 and 42 were rejected by the server,
       // * records no. 200 and higher couldn't be uploaded because we failed
       //   hard on the 3rd upload.
       if ((i == 23) || (i == 42) || (i >= 200))
         do_check_eq(engine._tracker.changedIDs[id], i);
       else
         do_check_false(id in engine._tracker.changedIDs);
     }
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_canDecrypt_noCryptoKeys() {
   _("SyncEngine.canDecrypt returns false if the engine fails to decrypt items on the server, e.g. due to a missing crypto key collection.");
   Service.identity.username = "foo";
   // Wipe collection keys so we can test the desired scenario.
   Service.collectionKeys.clear();
   let collection = new ServerCollection();
   collection._wbos.flying = new ServerWBO(
       'flying', encryptPayload({id: 'flying',
                                 denomination: "LNER Class A3 4472"}));
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let engine = makeRotaryEngine();
   try {
     do_check_false(engine.canDecrypt());
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_canDecrypt_true() {
   _("SyncEngine.canDecrypt returns true if the engine can decrypt the items on the server.");
   Service.identity.username = "foo";
   generateNewKeys(Service.collectionKeys);
   let collection = new ServerCollection();
   collection._wbos.flying = new ServerWBO(
       'flying', encryptPayload({id: 'flying',
                                 denomination: "LNER Class A3 4472"}));
   let server = sync_httpd_setup({
       "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let engine = makeRotaryEngine();
   try {
     do_check_true(engine.canDecrypt());
   } finally {
     cleanAndGo(server);
   }
 });
 add_test(function test_syncapplied_observer() {
   Service.identity.username = "foo";
   const NUMBER_OF_RECORDS = 10;
   let engine = makeRotaryEngine();
   // Create a batch of server side records.
   let collection = new ServerCollection();
   for (var i = 0; i < NUMBER_OF_RECORDS; i++) {
     let id = 'record-no-' + i;
     let payload = encryptPayload({id: id, denomination: "Record No. " + id});
     collection.insert(id, payload);
   }
   let server = httpd_setup({
     "/1.1/foo/storage/rotary": collection.handler()
   });
   let syncTesting = new SyncTestingInfrastructure(server);
   let meta_global = Service.recordManager.set(engine.metaURL,
                                               new WBORecord(engine.metaURL));
   meta_global.payload.engines = {rotary: {version: engine.version,
                                          syncID: engine.syncID}};
   let numApplyCalls = 0;
   let engine_name;
   let count;
   function onApplied(subject, data) {
     numApplyCalls++;
     engine_name = data;
     count = subject;
   }
   Svc.Obs.add("weave:engine:sync:applied", onApplied);
   try {
     Service.scheduler.hasIncomingItems = false;
     // Do sync.
     engine._syncStartup();
     engine._processIncoming();
     do_check_attribute_count(engine._store.items, 10);
     do_check_eq(numApplyCalls, 1);
     do_check_eq(engine_name, "rotary");
     do_check_eq(count.applied, 10);
     do_check_true(Service.scheduler.hasIncomingItems);
   } finally {
     cleanAndGo(server);
     Service.scheduler.hasIncomingItems = false;
     Svc.Obs.remove("weave:engine:sync:applied", onApplied);
   }
 });