Ensure that MergeDataAndStartSyncing considers already synced entries when setting the synced DSP.

chrome/browser/search_engines/template_url_service_sync_unittest.cc

 // Copyright (c) 2012 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 "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/search_engines/search_terms_data.h"
@@ skipping 1552 matching lines @@
   // Now sync the initial data.
   syncer::SyncDataList initial_data = CreateInitialSyncData();
   model()->MergeDataAndStartSyncing(syncer::SEARCH_ENGINES, initial_data,
       PassProcessor(), CreateAndPassSyncErrorFactory());
 
   // Ensure that the new entries were added and the default has not changed.
   EXPECT_EQ(4U, model()->GetAllSyncData(syncer::SEARCH_ENGINES).size());
   ASSERT_EQ(default_search, model()->GetDefaultSearchProvider());
 }
 
+TEST_F(TemplateURLServiceSyncTest, NewDefaultIsAlreadySynced) {
+  // Ensure that if the synced DSP pref changed to another synced entry (as
+  // opposed to coming in as a new entry), it gets reset correctly.
+  // Start by setting kSyncedDefaultSearchProviderGUID to the entry that should
+  // end up as the default. Note that this must be done before the initial
+  // entries are added as otherwise this call will set the DSP immediately.
+  profile_a()->GetTestingPrefService()->SetString(
+      prefs::kSyncedDefaultSearchProviderGUID, "key2");
+
+  syncer::SyncDataList initial_data = CreateInitialSyncData();
+  // Ensure that our candidate default supports replacement.
+  scoped_ptr<TemplateURL> turl(CreateTestTemplateURL(ASCIIToUTF16("key2"),
+      "http://key2.com/{searchTerms}", "key2", 90));
+  initial_data[1] = TemplateURLService::CreateSyncDataFromTemplateURL(*turl);
+  for (syncer::SyncDataList::const_iterator iter = initial_data.begin();
+      iter != initial_data.end(); ++iter) {
+    TemplateURL* converted = Deserialize(*iter);
+    model()->Add(converted);
+  }
+
+  // Set the initial default to something other than the desired default.
+  model()->SetDefaultSearchProvider(model()->GetTemplateURLForGUID("key1"));
+
+  // Merge in the same data (i.e. already synced entries).
+  model()->MergeDataAndStartSyncing(syncer::SEARCH_ENGINES, initial_data,
+      PassProcessor(), CreateAndPassSyncErrorFactory());
+
+  EXPECT_EQ(3U, model()->GetAllSyncData(syncer::SEARCH_ENGINES).size());
+  TemplateURL* current_default = model()->GetDefaultSearchProvider();
+  ASSERT_TRUE(current_default);
+  EXPECT_EQ("key2", current_default->sync_guid());
+  EXPECT_EQ(ASCIIToUTF16("key2"), current_default->keyword());
+}
+
 TEST_F(TemplateURLServiceSyncTest, SyncWithManagedDefaultSearch) {
   // First start off with a few entries and make sure we can set an unmanaged
   // default search provider.
   syncer::SyncDataList initial_data = CreateInitialSyncData();
   model()->MergeDataAndStartSyncing(syncer::SEARCH_ENGINES, initial_data,
       PassProcessor(), CreateAndPassSyncErrorFactory());
   model()->SetDefaultSearchProvider(model()->GetTemplateURLForGUID("key2"));
 
   EXPECT_EQ(3U, model()->GetAllSyncData(syncer::SEARCH_ENGINES).size());
   ASSERT_FALSE(model()->is_default_search_managed());
@@ skipping 392 matching lines @@
     if (test_cases[i].present_in_model == SYNC ||
         test_cases[i].present_in_model == BOTH) {
       ASSERT_TRUE(model()->GetTemplateURLForGUID(sync_guid));
       EXPECT_EQ(expected_sync_keyword, sync_turl->keyword());
       EXPECT_EQ(sync_url, sync_turl->url());
       EXPECT_EQ(sync_last_modified, sync_turl->last_modified().ToTimeT());
       model()->Remove(model()->GetTemplateURLForGUID(sync_guid));
     }
   }  // for
 }