Implement features needed for local ack handling in InvalidationStateTracker.

chrome/browser/sync/invalidations/invalidator_storage_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 "chrome/browser/sync/invalidations/invalidator_storage.h"
 
+#include "base/bind.h"
 #include "base/message_loop.h"
+#include "base/message_loop_proxy.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_pref_service.h"
+#include "sync/internal_api/public/base/invalidation_test_util.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using syncer::InvalidationStateMap;
 
 namespace browser_sync {
 
 namespace {
 
 const char kSourceKey[] = "source";
 const char kNameKey[] = "name";
 const char kMaxVersionKey[] = "max-version";
+const char kPayloadKey[] = "payload";
+const char kCurrentAckHandleKey[] = "current-ack";
+const char kExpectedAckHandleKey[] = "expected-ack";
 
 const int kChromeSyncSourceId = 1004;
 
+void GenerateAckHandlesTestHelper(syncer::AckHandleMap* output,
+                                  const syncer::AckHandleMap& input) {
+  *output = input;
+}
+
 }  // namespace
 
 class InvalidatorStorageTest : public testing::Test {
  public:
   InvalidatorStorageTest()
       : kBookmarksId_(kChromeSyncSourceId, "BOOKMARK"),
         kPreferencesId_(kChromeSyncSourceId, "PREFERENCE"),
         kAppNotificationsId_(kChromeSyncSourceId, "APP_NOTIFICATION"),
         kAutofillId_(kChromeSyncSourceId, "AUTOFILL") {}
 
  protected:
   TestingPrefService pref_service_;
 
   const invalidation::ObjectId kBookmarksId_;
   const invalidation::ObjectId kPreferencesId_;
   const invalidation::ObjectId kAppNotificationsId_;
   const invalidation::ObjectId kAutofillId_;
 
- private:
   MessageLoop loop_;
 };
 
 // Set max versions for various keys and verify that they are written and read
 // back correctly.
 TEST_F(InvalidatorStorageTest, MaxInvalidationVersions) {
   InvalidatorStorage storage(&pref_service_);
 
   InvalidationStateMap expected_max_versions;
   EXPECT_EQ(expected_max_versions, storage.GetAllInvalidationStates());
 
   expected_max_versions[kBookmarksId_].version = 2;
-  storage.SetMaxVersion(kBookmarksId_, 2);
+  expected_max_versions[kBookmarksId_].payload = "hello";
+  storage.SetMaxVersionAndPayload(kBookmarksId_, 2, "hello");
   EXPECT_EQ(expected_max_versions, storage.GetAllInvalidationStates());
 
   expected_max_versions[kPreferencesId_].version = 5;
-  storage.SetMaxVersion(kPreferencesId_, 5);
+  storage.SetMaxVersionAndPayload(kPreferencesId_, 5, std::string());
   EXPECT_EQ(expected_max_versions, storage.GetAllInvalidationStates());
 
   expected_max_versions[kAppNotificationsId_].version = 3;
-  storage.SetMaxVersion(kAppNotificationsId_, 3);
+  expected_max_versions[kAppNotificationsId_].payload = "world";
+  storage.SetMaxVersionAndPayload(kAppNotificationsId_, 3, "world");
   EXPECT_EQ(expected_max_versions, storage.GetAllInvalidationStates());
 
   expected_max_versions[kAppNotificationsId_].version = 4;
-  storage.SetMaxVersion(kAppNotificationsId_, 4);
+  expected_max_versions[kAppNotificationsId_].payload = "again";
+  storage.SetMaxVersionAndPayload(kAppNotificationsId_, 4, "again");
   EXPECT_EQ(expected_max_versions, storage.GetAllInvalidationStates());
 }
 
 // Forgetting an entry should cause that entry to be deleted.
 TEST_F(InvalidatorStorageTest, Forget) {
   InvalidatorStorage storage(&pref_service_);
   EXPECT_TRUE(storage.GetAllInvalidationStates().empty());
 
   InvalidationStateMap expected_max_versions;
   expected_max_versions[kBookmarksId_].version = 2;
+  expected_max_versions[kBookmarksId_].payload = "a";
   expected_max_versions[kPreferencesId_].version = 5;
-  storage.SetMaxVersion(kBookmarksId_, 2);
-  storage.SetMaxVersion(kPreferencesId_, 5);
+  expected_max_versions[kPreferencesId_].payload = "b";
+  storage.SetMaxVersionAndPayload(kBookmarksId_, 2, "a");
+  storage.SetMaxVersionAndPayload(kPreferencesId_, 5, "b");
   EXPECT_EQ(expected_max_versions, storage.GetAllInvalidationStates());
 
   expected_max_versions.erase(kPreferencesId_);
   syncer::ObjectIdSet to_forget;
   to_forget.insert(kPreferencesId_);
   storage.Forget(to_forget);
   EXPECT_EQ(expected_max_versions, storage.GetAllInvalidationStates());
 }
 
 // Clearing the storage should erase all version map entries and the bootstrap
 // data.
 TEST_F(InvalidatorStorageTest, Clear) {
   InvalidatorStorage storage(&pref_service_);
   EXPECT_TRUE(storage.GetAllInvalidationStates().empty());
   EXPECT_TRUE(storage.GetBootstrapData().empty());
 
   storage.SetBootstrapData("test");
   EXPECT_EQ("test", storage.GetBootstrapData());
   {
     InvalidationStateMap expected_max_versions;
     expected_max_versions[kAppNotificationsId_].version = 3;
-    storage.SetMaxVersion(kAppNotificationsId_, 3);
+    storage.SetMaxVersionAndPayload(kAppNotificationsId_, 3, std::string());
     EXPECT_EQ(expected_max_versions, storage.GetAllInvalidationStates());
   }
 
   storage.Clear();
 
   EXPECT_TRUE(storage.GetAllInvalidationStates().empty());
   EXPECT_TRUE(storage.GetBootstrapData().empty());
 }
 
 TEST_F(InvalidatorStorageTest, SerializeEmptyMap) {
@@ skipping 26 matching lines @@
   value = new DictionaryValue();
   value->SetString(kNameKey, "missing source and version");
   list_with_invalid_format.Append(value);
 
   value = new DictionaryValue();
   value->SetString(kMaxVersionKey, "3");
   list_with_invalid_format.Append(value);
 
   // Missing one required field
   value = new DictionaryValue();
-  value->SetString(kSourceKey, "14");
-  value->SetString(kNameKey, "missing version");
-  list_with_invalid_format.Append(value);
-
-  value = new DictionaryValue();
   value->SetString(kSourceKey, "233");
   value->SetString(kMaxVersionKey, "5");
   list_with_invalid_format.Append(value);
 
   value = new DictionaryValue();
   value->SetString(kNameKey, "missing source");
   value->SetString(kMaxVersionKey, "25");
   list_with_invalid_format.Append(value);
 
   // Invalid values in fields
@@ skipping 59 matching lines @@
   EXPECT_TRUE(map.empty());
 }
 
 // Tests that deserializing a well-formed value results in the expected version
 // map.
 TEST_F(InvalidatorStorageTest, DeserializeFromListBasic) {
   InvalidationStateMap map;
   base::ListValue list;
   DictionaryValue* value;
 
+  // Payload missing because of an upgrade from a version that didn't set it.
   value = new DictionaryValue();
   value->SetString(kSourceKey, base::IntToString(kAutofillId_.source()));
   value->SetString(kNameKey, kAutofillId_.name());
   value->SetString(kMaxVersionKey, "10");
   list.Append(value);
+  // Crash between SetMaxVersion() and a callback from GenerateAckHandles()
+  // could result in this state.
   value = new DictionaryValue();
   value->SetString(kSourceKey, base::IntToString(kBookmarksId_.source()));
   value->SetString(kNameKey, kBookmarksId_.name());
   value->SetString(kMaxVersionKey, "15");
+  value->SetString(kPayloadKey, "hello");
+  list.Append(value);
+  syncer::AckHandle ack_handle_1 = syncer::AckHandle::CreateUnique();
+  syncer::AckHandle ack_handle_2 = syncer::AckHandle::CreateUnique();
+  syncer::AckHandle ack_handle_3 = syncer::AckHandle::CreateUnique();
+  syncer::AckHandle ack_handle_4 = syncer::AckHandle::CreateUnique();
+  // We've never received an invalidation for a specific version, so no max
+  // version or payload information.
+  value = new DictionaryValue();
+  value->SetString(kSourceKey, base::IntToString(kPreferencesId_.source()));
+  value->SetString(kNameKey, kPreferencesId_.name());
+  value->Set(kCurrentAckHandleKey, ack_handle_1.ToValue().release());
+  value->Set(kExpectedAckHandleKey, ack_handle_2.ToValue().release());
+  list.Append(value);
+  // All fields set.
+  value = new DictionaryValue();
+  value->SetString(kSourceKey,
+                   base::IntToString(kAppNotificationsId_.source()));
+  value->SetString(kNameKey, kAppNotificationsId_.name());
+  value->SetString(kMaxVersionKey, "20");
+  value->SetString(kPayloadKey, "world");
+  value->Set(kCurrentAckHandleKey, ack_handle_3.ToValue().release());
+  value->Set(kExpectedAckHandleKey, ack_handle_4.ToValue().release());
   list.Append(value);
 
   InvalidatorStorage::DeserializeFromList(list, &map);
-  EXPECT_EQ(2U, map.size());
+  EXPECT_EQ(4U, map.size());
   EXPECT_EQ(10, map[kAutofillId_].version);
+  EXPECT_EQ(std::string(), map[kAutofillId_].payload);
+  EXPECT_FALSE(map[kAutofillId_].current.IsValid());
+  EXPECT_FALSE(map[kAutofillId_].expected.IsValid());
   EXPECT_EQ(15, map[kBookmarksId_].version);
+  EXPECT_EQ("hello", map[kBookmarksId_].payload);
+  EXPECT_FALSE(map[kBookmarksId_].current.IsValid());
+  EXPECT_FALSE(map[kBookmarksId_].expected.IsValid());
+  EXPECT_EQ(kint64min, map[kPreferencesId_].version);
+  EXPECT_EQ(std::string(), map[kPreferencesId_].payload);
+  EXPECT_THAT(map[kPreferencesId_].current, Eq(ack_handle_1));
+  EXPECT_THAT(map[kPreferencesId_].expected, Eq(ack_handle_2));
+  EXPECT_EQ(20, map[kAppNotificationsId_].version);
+  EXPECT_EQ("world", map[kAppNotificationsId_].payload);
+  EXPECT_THAT(map[kAppNotificationsId_].current, Eq(ack_handle_3));
+  EXPECT_THAT(map[kAppNotificationsId_].expected, Eq(ack_handle_4));
 }
 
 // Tests for legacy deserialization code.
 TEST_F(InvalidatorStorageTest, DeserializeMapOutOfRange) {
   InvalidationStateMap map;
   base::DictionaryValue dict_with_out_of_range_type;
 
   dict_with_out_of_range_type.SetString(
       base::IntToString(syncer::TOP_LEVEL_FOLDER), "100");
   dict_with_out_of_range_type.SetString(
@@ skipping 71 matching lines @@
 
 TEST_F(InvalidatorStorageTest, SetGetBootstrapData) {
   InvalidatorStorage storage(&pref_service_);
   const std::string mess("n\0tK\0\0l\344", 8);
   ASSERT_FALSE(IsStringUTF8(mess));
 
   storage.SetBootstrapData(mess);
   EXPECT_EQ(mess, storage.GetBootstrapData());
 }
 
+// Test that we correctly generate ack handles, acknowledge them, and persist
+// them.
+TEST_F(InvalidatorStorageTest, GenerateAckHandlesAndAcknowledge) {
+  InvalidatorStorage storage(&pref_service_);
+  syncer::ObjectIdSet ids;
+  InvalidationStateMap state_map;
+  syncer::AckHandleMap ack_handle_map;
+  syncer::AckHandleMap::const_iterator it;
+
+  // Test that it works as expected if the key doesn't already exist in the map,
+  // e.g. the first invalidation received for the object ID was not for a
+  // specific version.
+  ids.insert(kAutofillId_);
+  storage.GenerateAckHandles(
+      ids, base::MessageLoopProxy::current(),
+      base::Bind(&GenerateAckHandlesTestHelper, &ack_handle_map));
+  loop_.RunUntilIdle();
+  EXPECT_EQ(1U, ack_handle_map.size());
+  it = ack_handle_map.find(kAutofillId_);
+  ASSERT_NE(ack_handle_map.end(), it);
+  EXPECT_TRUE(it->second.IsValid());
+  state_map[kAutofillId_].expected = it->second;
+  EXPECT_EQ(state_map, storage.GetAllInvalidationStates());
+
+  storage.Acknowledge(kAutofillId_, it->second);
+  state_map[kAutofillId_].current = it->second;
+  EXPECT_EQ(state_map, storage.GetAllInvalidationStates());
+
+  ids.clear();
+
+  // Test that it works as expected if the key already exists.
+  state_map[kBookmarksId_].version = 11;
+  state_map[kBookmarksId_].payload = "hello";
+  storage.SetMaxVersionAndPayload(kBookmarksId_, 11, "hello");
+  EXPECT_EQ(state_map, storage.GetAllInvalidationStates());
+  ids.insert(kBookmarksId_);
+  storage.GenerateAckHandles(
+      ids, base::MessageLoopProxy::current(),
+      base::Bind(&GenerateAckHandlesTestHelper, &ack_handle_map));
+  loop_.RunUntilIdle();
+  EXPECT_EQ(1U, ack_handle_map.size());
+  it = ack_handle_map.find(kBookmarksId_);
+  ASSERT_NE(ack_handle_map.end(), it);
+  EXPECT_TRUE(it->second.IsValid());
+  state_map[kBookmarksId_].expected = it->second;
+  EXPECT_EQ(state_map, storage.GetAllInvalidationStates());
+
+  storage.Acknowledge(kBookmarksId_, it->second);
+  state_map[kBookmarksId_].current = it->second;
+  EXPECT_EQ(state_map, storage.GetAllInvalidationStates());
+
+  // Finally, test that the ack handles are updated on if we're asked to
+  // generate another ack handle for the same key.
+  state_map[kBookmarksId_].version = 12;
+  state_map[kBookmarksId_].payload = "world";
+  storage.SetMaxVersionAndPayload(kBookmarksId_, 12, "world");
+  EXPECT_EQ(state_map, storage.GetAllInvalidationStates());
+  ids.insert(kBookmarksId_);
+  storage.GenerateAckHandles(
+      ids, base::MessageLoopProxy::current(),
+      base::Bind(&GenerateAckHandlesTestHelper, &ack_handle_map));
+  loop_.RunUntilIdle();
+  EXPECT_EQ(1U, ack_handle_map.size());
+  it = ack_handle_map.find(kBookmarksId_);
+  ASSERT_NE(ack_handle_map.end(), it);
+  EXPECT_TRUE(it->second.IsValid());
+  state_map[kBookmarksId_].expected = it->second;
+  EXPECT_EQ(state_map, storage.GetAllInvalidationStates());
+
+  storage.Acknowledge(kBookmarksId_, it->second);
+  state_map[kBookmarksId_].current = it->second;
+  EXPECT_EQ(state_map, storage.GetAllInvalidationStates());
+}
+
 }  // namespace browser_sync