[Sync] Initial support for encrypting any datatype (no UI hookup yet).

chrome/browser/sync/syncable/nigori_util_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/syncable/nigori_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace syncable {
+
+typedef testing::Test NigoriUtilTest;
+
+TEST_F(NigoriUtilTest, NigoriEncryptionTypes) {
+  sync_pb::NigoriSpecifics nigori;
+  ModelTypeSet encrypted_types;
+  FillNigoriEncryptedTypes(encrypted_types, &nigori);
+  ModelTypeSet test_types = GetEncryptedDataTypesFromNigori(nigori);
+  EXPECT_EQ(encrypted_types, test_types);
+
+  for (int i = FIRST_REAL_MODEL_TYPE; i < MODEL_TYPE_COUNT; ++i) {
+    encrypted_types.insert(ModelTypeFromInt(i));
+  }
+  FillNigoriEncryptedTypes(encrypted_types, &nigori);
+  test_types = GetEncryptedDataTypesFromNigori(nigori);
+  encrypted_types.erase(syncable::NIGORI);  // Should not get set.
+  EXPECT_EQ(encrypted_types, test_types);
+
+  encrypted_types.erase(syncable::BOOKMARKS);
+  encrypted_types.erase(syncable::SESSIONS);
+  FillNigoriEncryptedTypes(encrypted_types, &nigori);
+  test_types = GetEncryptedDataTypesFromNigori(nigori);
+  EXPECT_EQ(encrypted_types, test_types);
+}
+
+// ProcessUnsyncedChangesForEncryption and other methods that rely on the syncer
+// are tested in apply_updates_command_unittest.cc
+
+}  // namespace syncable