Changed DB to store node positions as Ordinals.

sync/syncable/syncable_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 <string>
 
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/scoped_temp_dir.h"
 #include "base/stringprintf.h"
 #include "base/synchronization/condition_variable.h"
 #include "base/test/values_test_util.h"
 #include "base/threading/platform_thread.h"
 #include "base/values.h"
+#include "sync/internal_api/public/base/ordinal.h"
+#include "sync/internal_api/public/base/node_ordinal.h"
 #include "sync/protocol/bookmark_specifics.pb.h"
 #include "sync/syncable/directory_backing_store.h"
 #include "sync/syncable/directory_change_delegate.h"
 #include "sync/syncable/in_memory_directory_backing_store.h"
 #include "sync/syncable/metahandle_set.h"
 #include "sync/syncable/mutable_entry.h"
 #include "sync/syncable/on_disk_directory_backing_store.h"
 #include "sync/syncable/read_transaction.h"
 #include "sync/syncable/syncable_proto_util.h"
 #include "sync/syncable/syncable_util.h"
@@ skipping 1329 matching lines @@
     EXPECT_TRUE(server_knows.good());
 
     Entry not_is_del(&trans, GET_BY_ID, not_is_del_id);
     EXPECT_TRUE(not_is_del.good());
 
     Entry zombie(&trans, GET_BY_ID, zombie_id);
     EXPECT_FALSE(zombie.good());
   }
 }
 
+TEST_F(SyncableDirectoryTest, OrdinalHandlesNullValues) {
+  TestIdFactory id_factory;
+  Id null_child_id;
+  const char null_cstr[] = "\0null\0test";
+  std::string null_str(null_cstr, null_cstr + 9);

[rlarocque, 2012/10/02 01:39:50]

That second parameter is likely to be bigger than you expected.

I think, but I'm not entirely sure, that sizeof(null_cstr) will get you the
value you want.  Maybe subtract 1 from it if you want to be really tricky and
pass in a string that is not NULL-terminated.

+  int64 null_ord = NodeOrdinalToInt64(
+      NodeOrdinal(null_str));
+
+  {
+    WriteTransaction trans(FROM_HERE, UNITTEST, dir_.get());
+
+    MutableEntry parent(&trans, CREATE, id_factory.root(), "parent");
+    parent.Put(IS_DIR, true);
+    parent.Put(IS_UNSYNCED, true);
+
+    MutableEntry child(&trans, CREATE, parent.Get(ID), "child");
+    child.Put(IS_UNSYNCED, true);
+    child.Put(SERVER_POSITION_IN_PARENT, null_ord);
+
+    null_child_id = child.Get(ID);
+  }
+
+  EXPECT_EQ(OPENED, SimulateSaveAndReloadDir());
+
+  {
+    ReadTransaction trans(FROM_HERE, dir_.get());
+
+    Entry null_ordinal_child(&trans, GET_BY_ID, null_child_id);
+    EXPECT_EQ(null_ord,
+              null_ordinal_child.Get(SERVER_POSITION_IN_PARENT));
+  }
+
+}
+
 // An OnDirectoryBackingStore that can be set to always fail SaveChanges.
 class TestBackingStore : public OnDiskDirectoryBackingStore {
  public:
   TestBackingStore(const std::string& dir_name,
                    const FilePath& backing_filepath);
 
   virtual ~TestBackingStore();
 
   virtual bool SaveChanges(const Directory::SaveChangesSnapshot& snapshot)
       OVERRIDE;
@@ skipping 711 matching lines @@
   EXPECT_TRUE(CreateWithDefaultTag(factory_.NewServerId(), true));
   EXPECT_FALSE(CreateWithDefaultTag(factory_.NewServerId(), true));
   EXPECT_FALSE(CreateWithDefaultTag(factory_.NewServerId(), false));
   EXPECT_FALSE(CreateWithDefaultTag(factory_.NewLocalId(), false));
   EXPECT_FALSE(CreateWithDefaultTag(factory_.NewLocalId(), true));
 }
 
 }  // namespace
 }  // namespace syncable
 }  // namespace syncer