Implement sync in the NonBlockingTypeProcessor

sync/engine/model_thread_sync_entity_unittest.cc

+// Copyright 2014 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 "sync/engine/model_thread_sync_entity.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
+#include "sync/internal_api/public/base/model_type.h"
+#include "sync/protocol/sync.pb.h"
+#include "sync/syncable/syncable_util.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace syncer {
+
+// Some simple sanity tests for the ModelThreadSyncEntity.
+//
+// A lot of the more complicated sync logic is implemented in the
+// NonBlockingTypeProcessor that owns the ModelThreadSyncEntity.  We
+// can't unit test it here.
+//
+// Instead, we focus on simple tests to make sure that variables are getting
+// properly intialized and flags properly set.  Anything more complicated would
+// be a redundant and incomplete version of the NonBlockingTypeProcessor tests.
+class ModelThreadSyncEntityTest : public ::testing::Test {
+ public:
+  ModelThreadSyncEntityTest()
+      : kServerId("ServerID"),
+        kClientTag("sample.pref.name"),
+        kClientTagHash(syncable::GenerateSyncableHash(PREFERENCES, kClientTag)),
+        kCtime(base::Time::UnixEpoch() + base::TimeDelta::FromDays(10)),
+        kMtime(base::Time::UnixEpoch() + base::TimeDelta::FromDays(20)) {
+    sync_pb::PreferenceSpecifics* pref_specifics =
+        specifics.mutable_preference();
+    pref_specifics->set_name(kClientTag);
+    pref_specifics->set_value("pref.value");
+  }
+
+  const std::string kServerId;
+  const std::string kClientTag;
+  const std::string kClientTagHash;
+  const base::Time kCtime;
+  const base::Time kMtime;
+  sync_pb::EntitySpecifics specifics;
+};
+
+TEST_F(ModelThreadSyncEntityTest, NewLocalItem) {
+  scoped_ptr<ModelThreadSyncEntity> entity(
+      ModelThreadSyncEntity::NewLocalItem("asdf", specifics, kCtime));
+
+  EXPECT_TRUE(entity->IsWriteRequired());
+  EXPECT_TRUE(entity->IsUnsynced());
+  EXPECT_FALSE(entity->UpdateIsReflection(1));
+  EXPECT_TRUE(entity->UpdateIsInConflict(1));
+}
+
+TEST_F(ModelThreadSyncEntityTest, FromServerUpdate) {
+  scoped_ptr<ModelThreadSyncEntity> entity(
+      ModelThreadSyncEntity::FromServerUpdate(
+          kServerId,
+          kClientTagHash,
+          kClientTag,  // As non-unique name.
+          10,
+          specifics,
+          false,
+          kCtime,
+          kMtime));
+
+  EXPECT_TRUE(entity->IsWriteRequired());
+  EXPECT_FALSE(entity->IsUnsynced());
+  EXPECT_TRUE(entity->UpdateIsReflection(9));
+  EXPECT_TRUE(entity->UpdateIsReflection(10));
+  EXPECT_FALSE(entity->UpdateIsReflection(11));
+  EXPECT_FALSE(entity->UpdateIsInConflict(11));
+}
+
+// Tombstones should behave just like regular updates.  Mostly.  The strangest
+// thing about them is that they don't have specifics, so it can be hard to
+// detect their type.  Fortunately, this class doesn't care about types in
+// received updates.
+TEST_F(ModelThreadSyncEntityTest, TombstoneUpdate) {
+  scoped_ptr<ModelThreadSyncEntity> entity(
+      ModelThreadSyncEntity::FromServerUpdate(
+          kServerId,
+          kClientTagHash,
+          kClientTag,  // As non-unique name.
+          10,
+          sync_pb::EntitySpecifics(),
+          true,
+          kCtime,
+          kMtime));
+
+  EXPECT_TRUE(entity->IsWriteRequired());
+  EXPECT_FALSE(entity->IsUnsynced());
+  EXPECT_TRUE(entity->UpdateIsReflection(9));
+  EXPECT_TRUE(entity->UpdateIsReflection(10));
+  EXPECT_FALSE(entity->UpdateIsReflection(11));
+  EXPECT_FALSE(entity->UpdateIsInConflict(11));
+}
+
+// Apply a deletion update.
+TEST_F(ModelThreadSyncEntityTest, ApplyUpdate) {
+  scoped_ptr<ModelThreadSyncEntity> entity(
+      ModelThreadSyncEntity::FromServerUpdate(
+          kServerId,
+          kClientTagHash,
+          kClientTag,  // As non-unique name.
+          10,
+          specifics,
+          false,
+          kCtime,
+          kMtime));
+
+  // A deletion update one version later.
+  entity->ApplyUpdateFromServer(11,
+                                true,
+                                sync_pb::EntitySpecifics(),
+                                kMtime + base::TimeDelta::FromSeconds(10));
+
+  EXPECT_TRUE(entity->IsWriteRequired());
+  EXPECT_FALSE(entity->IsUnsynced());
+  EXPECT_TRUE(entity->UpdateIsReflection(11));
+  EXPECT_FALSE(entity->UpdateIsReflection(12));
+}
+
+TEST_F(ModelThreadSyncEntityTest, LocalChange) {
+  scoped_ptr<ModelThreadSyncEntity> entity(
+      ModelThreadSyncEntity::FromServerUpdate(
+          kServerId,
+          kClientTagHash,
+          kClientTag,  // As non-unique name.
+          10,
+          specifics,
+          false,
+          kCtime,
+          kMtime));
+
+  sync_pb::EntitySpecifics specifics2;
+  specifics2.CopyFrom(specifics);
+  specifics2.mutable_preference()->set_value("new.pref.value");
+
+  entity->MakeLocalChange(kClientTag, specifics2);
+  EXPECT_TRUE(entity->IsWriteRequired());
+  EXPECT_TRUE(entity->IsUnsynced());
+
+  EXPECT_TRUE(entity->UpdateIsReflection(10));
+  EXPECT_FALSE(entity->UpdateIsInConflict(10));
+
+  EXPECT_FALSE(entity->UpdateIsReflection(11));
+  EXPECT_TRUE(entity->UpdateIsInConflict(11));
+}
+
+TEST_F(ModelThreadSyncEntityTest, LocalDeletion) {
+  scoped_ptr<ModelThreadSyncEntity> entity(
+      ModelThreadSyncEntity::FromServerUpdate(
+          kServerId,
+          kClientTagHash,
+          kClientTag,  // As non-unique name.
+          10,
+          specifics,
+          false,
+          kCtime,
+          kMtime));
+
+  entity->Delete(kClientTag);
+
+  EXPECT_TRUE(entity->IsWriteRequired());
+  EXPECT_TRUE(entity->IsUnsynced());
+
+  EXPECT_TRUE(entity->UpdateIsReflection(10));
+  EXPECT_FALSE(entity->UpdateIsInConflict(10));
+
+  EXPECT_FALSE(entity->UpdateIsReflection(11));
+  EXPECT_TRUE(entity->UpdateIsInConflict(11));
+}
+
+}  // namespace syncer