[Sync] Make BackendMigrator not wait for full sync cycles

chrome/browser/sync/backend_migrator_unittest.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/backend_migrator.h"
 
+#include "base/message_loop.h"
 #include "chrome/browser/sync/glue/data_type_manager_mock.h"
 #include "chrome/browser/sync/profile_sync_service_mock.h"
 #include "chrome/browser/sync/sessions/session_state.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/test/base/testing_browser_process_test.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
 using ::testing::Eq;
@@ skipping 17 matching lines @@
     Mock::VerifyAndClear(manager());
     Mock::VerifyAndClear(&service_);
     preferred_types_.insert(syncable::BOOKMARKS);
     preferred_types_.insert(syncable::PREFERENCES);
     preferred_types_.insert(syncable::AUTOFILL);
 
     ON_CALL(service_, GetPreferredDataTypes(_)).
         WillByDefault(SetArgumentPointee<0>(preferred_types_));
   }
 
-  void ReturnEmptyProgressMarkersInSnapshot() {
-    ReturnNonEmptyProgressMarkersInSnapshot(syncable::ModelTypeSet());
-  }
-
-  void ReturnNonEmptyProgressMarkersInSnapshot(
-      const syncable::ModelTypeSet& for_types) {
-    std::string download_progress_markers[syncable::MODEL_TYPE_COUNT];
-    for (syncable::ModelTypeSet::const_iterator it = for_types.begin();
-         it != for_types.end(); ++it) {
-      download_progress_markers[*it] = "foobar";
-    }
-
-    snap_.reset(new SyncSessionSnapshot(SyncerStatus(), ErrorCounters(),
-        0, false, syncable::ModelTypeBitSet(), download_progress_markers,
-        false, false, 0, 0, 0, false, sessions::SyncSourceInfo(), 0,
-        base::Time::Now()));
-    EXPECT_CALL(service_, GetLastSessionSnapshot())
-        .WillOnce(Return(snap_.get()));
-  }
-
   void SendConfigureDone(DataTypeManager::ConfigureStatus status,
                          const syncable::ModelTypeSet& types) {
     if (status == DataTypeManager::OK) {
       DataTypeManager::ConfigureResult result(status, types);
       NotificationService::current()->Notify(
           chrome::NOTIFICATION_SYNC_CONFIGURE_DONE,
           Source<DataTypeManager>(&manager_),
           Details<const DataTypeManager::ConfigureResult>(&result));
     } else {
         DataTypeManager::ConfigureResult result(
             status,
             types,
             syncable::ModelTypeSet(),
             FROM_HERE);
         NotificationService::current()->Notify(
             chrome::NOTIFICATION_SYNC_CONFIGURE_DONE,
             Source<DataTypeManager>(&manager_),
             Details<const DataTypeManager::ConfigureResult>(&result));
     }
+    message_loop_.RunAllPending();
   }
 
   ProfileSyncService* service() { return &service_; }
   DataTypeManagerMock* manager() { return &manager_; }
   const syncable::ModelTypeSet& preferred_types() { return preferred_types_; }
   void RemovePreferredType(syncable::ModelType type) {
     preferred_types_.erase(type);
     Mock::VerifyAndClear(&service_);
     ON_CALL(service_, GetPreferredDataTypes(_)).
         WillByDefault(SetArgumentPointee<0>(preferred_types_));
   }
  private:
-  scoped_ptr<SyncSessionSnapshot> snap_;
+  MessageLoop message_loop_;
   syncable::ModelTypeSet preferred_types_;
   NiceMock<ProfileSyncServiceMock> service_;
   NiceMock<DataTypeManagerMock> manager_;
 };
 
 // Test that in the normal case a migration does transition through each state
 // and wind up back in IDLE.
 TEST_F(BackendMigratorTest, Sanity) {
   BackendMigrator migrator(service(), manager());
   syncable::ModelTypeSet to_migrate, difference;
   to_migrate.insert(syncable::PREFERENCES);
   difference.insert(syncable::AUTOFILL);
   difference.insert(syncable::BOOKMARKS);
 
   EXPECT_CALL(*manager(), state())
       .WillOnce(Return(DataTypeManager::CONFIGURED));
-  EXPECT_CALL(*manager(), Configure(_, sync_api::CONFIGURE_REASON_MIGRATION));
+  EXPECT_CALL(*manager(), Configure(_, sync_api::CONFIGURE_REASON_MIGRATION))
+      .Times(2);
 
   migrator.MigrateTypes(to_migrate);
   EXPECT_EQ(BackendMigrator::DISABLING_TYPES, migrator.state());
 
   SendConfigureDone(DataTypeManager::OK, difference);
-  EXPECT_EQ(BackendMigrator::WAITING_FOR_PURGE, migrator.state());
-
-  ReturnEmptyProgressMarkersInSnapshot();
-  EXPECT_CALL(*manager(), Configure(preferred_types(),
-      sync_api::CONFIGURE_REASON_MIGRATION));
-  migrator.OnStateChanged();
   EXPECT_EQ(BackendMigrator::REENABLING_TYPES, migrator.state());
 
   SendConfigureDone(DataTypeManager::OK, preferred_types());
   EXPECT_EQ(BackendMigrator::IDLE, migrator.state());
 }
 
 // Test that in the normal case with Nigori a migration transitions through
 // each state and wind up back in IDLE.
 TEST_F(BackendMigratorTest, MigrateNigori) {
   BackendMigrator migrator(service(), manager());
   syncable::ModelTypeSet to_migrate, difference;
   to_migrate.insert(syncable::NIGORI);
   difference.insert(syncable::AUTOFILL);
   difference.insert(syncable::BOOKMARKS);
 
   EXPECT_CALL(*manager(), state())
       .WillOnce(Return(DataTypeManager::CONFIGURED));
 
   EXPECT_CALL(*manager(), ConfigureWithoutNigori(_,
       sync_api::CONFIGURE_REASON_MIGRATION));
 
   migrator.MigrateTypes(to_migrate);
   EXPECT_EQ(BackendMigrator::DISABLING_TYPES, migrator.state());
 
   SendConfigureDone(DataTypeManager::OK, difference);
-  EXPECT_EQ(BackendMigrator::WAITING_FOR_PURGE, migrator.state());
-
-  ReturnEmptyProgressMarkersInSnapshot();
-  EXPECT_CALL(*manager(), Configure(preferred_types(),
-      sync_api::CONFIGURE_REASON_MIGRATION));
-  migrator.OnStateChanged();
   EXPECT_EQ(BackendMigrator::REENABLING_TYPES, migrator.state());
 
   SendConfigureDone(DataTypeManager::OK, preferred_types());
   EXPECT_EQ(BackendMigrator::IDLE, migrator.state());
 }
 
 
 // Test that the migrator waits for the data type manager to be idle before
 // starting a migration.
 TEST_F(BackendMigratorTest, WaitToStart) {
@@ skipping 21 matching lines @@
 TEST_F(BackendMigratorTest, RestartMigration) {
   BackendMigrator migrator(service(), manager());
   syncable::ModelTypeSet to_migrate1, to_migrate2, bookmarks;
   to_migrate1.insert(syncable::PREFERENCES);
   to_migrate2.insert(syncable::AUTOFILL);
   bookmarks.insert(syncable::BOOKMARKS);
 
   EXPECT_CALL(*manager(), state())
       .WillOnce(Return(DataTypeManager::CONFIGURED));
   EXPECT_CALL(*manager(), Configure(_, sync_api::CONFIGURE_REASON_MIGRATION))
-              .Times(1);
+              .Times(2);
   migrator.MigrateTypes(to_migrate1);
 
   EXPECT_EQ(BackendMigrator::DISABLING_TYPES, migrator.state());
   migrator.MigrateTypes(to_migrate2);
 
   syncable::ModelTypeSet difference1;
   std::set_difference(preferred_types().begin(), preferred_types().end(),
                       to_migrate1.begin(), to_migrate1.end(),
                       std::inserter(difference1, difference1.end()));
 
   Mock::VerifyAndClearExpectations(manager());
-  EXPECT_CALL(*manager(), state())
-      .WillOnce(Return(DataTypeManager::CONFIGURED));
-  EXPECT_CALL(*manager(), Configure(bookmarks,
-      sync_api::CONFIGURE_REASON_MIGRATION));
+  EXPECT_CALL(*manager(), Configure(_, sync_api::CONFIGURE_REASON_MIGRATION))
+      .Times(2);
   SendConfigureDone(DataTypeManager::OK, difference1);
   EXPECT_EQ(BackendMigrator::DISABLING_TYPES, migrator.state());
 
   SendConfigureDone(DataTypeManager::OK, bookmarks);
-  EXPECT_EQ(BackendMigrator::WAITING_FOR_PURGE, migrator.state());
+  EXPECT_EQ(BackendMigrator::REENABLING_TYPES, migrator.state());
 }
 
 // Test that an external invocation of Configure(...) during a migration results
 // in a migration reattempt.
 TEST_F(BackendMigratorTest, InterruptedWhileDisablingTypes) {
   BackendMigrator migrator(service(), manager());
   syncable::ModelTypeSet to_migrate;
   syncable::ModelTypeSet difference;
   to_migrate.insert(syncable::PREFERENCES);
   difference.insert(syncable::AUTOFILL);
   difference.insert(syncable::BOOKMARKS);
 
   EXPECT_CALL(*manager(), state())
       .WillOnce(Return(DataTypeManager::CONFIGURED));
   EXPECT_CALL(*manager(), Configure(difference,
       sync_api::CONFIGURE_REASON_MIGRATION));
   migrator.MigrateTypes(to_migrate);
   EXPECT_EQ(BackendMigrator::DISABLING_TYPES, migrator.state());
 
   Mock::VerifyAndClearExpectations(manager());
-  EXPECT_CALL(*manager(), state())
-      .WillOnce(Return(DataTypeManager::CONFIGURED));
   EXPECT_CALL(*manager(), Configure(difference,
       sync_api::CONFIGURE_REASON_MIGRATION));
   SendConfigureDone(DataTypeManager::OK, preferred_types());
 
   EXPECT_EQ(BackendMigrator::DISABLING_TYPES, migrator.state());
 }
 
-// Test that spurious OnStateChanged events don't confuse the migrator while
-// it's waiting for disabled types to have been purged from the sync db.
-TEST_F(BackendMigratorTest, WaitingForPurge) {
-  BackendMigrator migrator(service(), manager());
-  syncable::ModelTypeSet to_migrate, difference;
-  to_migrate.insert(syncable::PREFERENCES);
-  to_migrate.insert(syncable::AUTOFILL);
-  difference.insert(syncable::BOOKMARKS);
-
-  EXPECT_CALL(*manager(), state())
-      .WillOnce(Return(DataTypeManager::CONFIGURED));
-  EXPECT_CALL(*manager(), Configure(_, sync_api::CONFIGURE_REASON_MIGRATION));
-  migrator.MigrateTypes(to_migrate);
-  SendConfigureDone(DataTypeManager::OK, difference);
-  EXPECT_EQ(BackendMigrator::WAITING_FOR_PURGE, migrator.state());
-
-  ReturnNonEmptyProgressMarkersInSnapshot(to_migrate);
-  migrator.OnStateChanged();
-  EXPECT_EQ(BackendMigrator::WAITING_FOR_PURGE, migrator.state());
-
-  syncable::ModelTypeSet prefs;
-  prefs.insert(syncable::PREFERENCES);
-  ReturnNonEmptyProgressMarkersInSnapshot(prefs);
-  migrator.OnStateChanged();
-  EXPECT_EQ(BackendMigrator::WAITING_FOR_PURGE, migrator.state());
-
-  syncable::ModelTypeSet bookmarks;
-  bookmarks.insert(syncable::BOOKMARKS);
-  ReturnNonEmptyProgressMarkersInSnapshot(bookmarks);
-  EXPECT_CALL(*manager(), Configure(preferred_types(),
-      sync_api::CONFIGURE_REASON_MIGRATION));
-  migrator.OnStateChanged();
-  EXPECT_EQ(BackendMigrator::REENABLING_TYPES, migrator.state());
-}
-
 TEST_F(BackendMigratorTest, MigratedTypeDisabledByUserDuringMigration) {
   BackendMigrator migrator(service(), manager());
   syncable::ModelTypeSet to_migrate;
   to_migrate.insert(syncable::PREFERENCES);
 
   EXPECT_CALL(*manager(), state())
       .WillOnce(Return(DataTypeManager::CONFIGURED));
-  EXPECT_CALL(*manager(), Configure(_, sync_api::CONFIGURE_REASON_MIGRATION));
+  EXPECT_CALL(*manager(), Configure(_, sync_api::CONFIGURE_REASON_MIGRATION))
+      .Times(2);
   migrator.MigrateTypes(to_migrate);
 
   RemovePreferredType(syncable::PREFERENCES);
   SendConfigureDone(DataTypeManager::OK, preferred_types());
-  EXPECT_EQ(BackendMigrator::WAITING_FOR_PURGE, migrator.state());
-
-  Mock::VerifyAndClearExpectations(manager());
-  ReturnEmptyProgressMarkersInSnapshot();
-  EXPECT_CALL(*manager(), Configure(preferred_types(),
-      sync_api::CONFIGURE_REASON_MIGRATION));
-  migrator.OnStateChanged();
-
   EXPECT_EQ(BackendMigrator::REENABLING_TYPES, migrator.state());
   SendConfigureDone(DataTypeManager::OK, preferred_types());
   EXPECT_EQ(BackendMigrator::IDLE, migrator.state());
 }
 
 TEST_F(BackendMigratorTest, ConfigureFailure) {
   BackendMigrator migrator(service(), manager());
   syncable::ModelTypeSet to_migrate;
   to_migrate.insert(syncable::PREFERENCES);
 
   EXPECT_CALL(*manager(), state())
       .WillOnce(Return(DataTypeManager::CONFIGURED));
   EXPECT_CALL(*manager(), Configure(_, sync_api::CONFIGURE_REASON_MIGRATION))
               .Times(1);
   migrator.MigrateTypes(to_migrate);
   SendConfigureDone(DataTypeManager::ABORTED, syncable::ModelTypeSet());
   EXPECT_EQ(BackendMigrator::IDLE, migrator.state());
 }
 
 };  // namespace browser_sync