Enable sync for the settings from the Extension Settings API.

chrome/browser/extensions/extension_settings_sync_unittest.cc

Index: chrome/browser/extensions/extension_settings_sync_unittest.cc
diff --git a/chrome/browser/extensions/extension_settings_sync_unittest.cc b/chrome/browser/extensions/extension_settings_sync_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7f77b1bb9d70909d7130922f4aa7d447dcf84465
--- /dev/null
+++ b/chrome/browser/extensions/extension_settings_sync_unittest.cc
@@ -0,0 +1,492 @@
+// 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 "testing/gtest/include/gtest/gtest.h"
+
+#include "base/bind.h"
+#include "base/json/json_reader.h"
+#include "base/json/json_writer.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
+#include "base/scoped_temp_dir.h"
+#include "base/task.h"
+#include "chrome/browser/extensions/extension_settings.h"
+#include "chrome/browser/extensions/extension_settings_storage_cache.h"
+#include "chrome/browser/extensions/extension_settings_noop_storage.h"
+#include "chrome/browser/extensions/extension_settings_sync_util.h"
+#include "chrome/browser/extensions/syncable_extension_settings_storage.h"
+#include "chrome/browser/sync/api/sync_change_processor.h"
+#include "content/browser/browser_thread.h"
+
+// TODO(kalman): Integration tests for sync.
+
+namespace {
+
+// Gets the pretty-printed JSON for a value.
+static std::string GetJson(const Value& value) {
+  std::string json;
+  base::JSONWriter::Write(&value, true, &json);
+  return json;
+}
+
+// Returns whether two Values are equal.
+testing::AssertionResult ValuesEq(
+    const char* expected_expr,
+    const char* actual_expr,
+    const Value* expected,
+    const Value* actual) {
+  if (expected == actual) {
+    return testing::AssertionSuccess();
+  }
+  if (!expected && actual) {
+    return testing::AssertionFailure() <<
+        "Expected NULL, actual: " << GetJson(*actual);
+  }
+  if (expected && !actual) {
+    return testing::AssertionFailure() <<
+        "Expected: " << GetJson(*expected) << ", actual NULL";
+  }
+  if (!expected->Equals(actual)) {
+    return testing::AssertionFailure() <<
+        "Expected: " << GetJson(*expected) << ", actual: " << GetJson(*actual);
+  }
+  return testing::AssertionSuccess();
+}
+
+// Returns whether the result of a storage operation is an expected value.
+// Logs when different.
+testing::AssertionResult SettingsEq(
+    const char* expected_expr,
+    const char* actual_expr,
+    const DictionaryValue* expected,
+    const ExtensionSettingsStorage::Result actual) {
+  if (actual.HasError()) {
+    return testing::AssertionFailure() <<
+        "Expected: " << GetJson(*expected) <<
+        ", actual has error: " << actual.GetError();
+  }
+  return ValuesEq(
+      expected_expr, actual_expr, expected, actual.GetSettings());
+}
+
+// SyncChangeProcessor which just records the changes made, accessed after
+// being converted to the more useful ExtensionSettingSyncData via changes().
+class MockSyncChangeProcessor : public SyncChangeProcessor {
+ public:
+  virtual SyncError ProcessSyncChanges(
+      const tracked_objects::Location& from_here,
+      const SyncChangeList& change_list) OVERRIDE {
+    for (SyncChangeList::const_iterator it = change_list.begin();
+        it != change_list.end(); ++it) {
+      changes_.push_back(ExtensionSettingSyncData(*it));
+    }
+    return SyncError();
+  }
+
+  const ExtensionSettingSyncDataList& changes() { return changes_; }
+
+  void ClearChanges() {
+    changes_.clear();
+  }
+
+  // Returns the only change for a given extension setting.  If there is not
+  // exactly 1 change for that key, a test assertion will fail.
+  ExtensionSettingSyncData GetOnlyChange(
+      const std::string& extension_id, const std::string& key) {
+    ExtensionSettingSyncDataList matching_changes;
+    for (ExtensionSettingSyncDataList::iterator it = changes_.begin();
+        it != changes_.end(); ++it) {
+      if (it->extension_id() == extension_id && it->key() == key) {
+        matching_changes.push_back(*it);
+      }
+    }
+    if (matching_changes.empty()) {
+      ADD_FAILURE() << "No matching changes for " << extension_id << "/" <<
+          key << " (out of " << changes_.size() << ")";
+      return ExtensionSettingSyncData(SyncChange::ACTION_INVALID, "", "", NULL);
+    }
+    if (matching_changes.size() != 1u) {
+      ADD_FAILURE() << matching_changes.size() << " matching changes for " <<
+           extension_id << "/" << key << " (out of " << changes_.size() << ")";
+    }
+    return matching_changes[0];
+  }
+
+ private:
+  ExtensionSettingSyncDataList changes_;
+};
+
+}  // namespace
+
+class ExtensionSettingsSyncTest : public testing::Test {
+ public:
+  ExtensionSettingsSyncTest()
+      : ui_thread_(BrowserThread::UI, MessageLoop::current()),
+        file_thread_(BrowserThread::FILE, MessageLoop::current()) {}
+
+  virtual void SetUp() OVERRIDE {
+    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
+    settings_.reset(new ExtensionSettings(temp_dir_.path()));
+  }
+
+  virtual void TearDown() OVERRIDE {
+    // Must do this explicitly here so that it's destroyed before the
+    // message loops are.
+    settings_.reset();
+  }
+
+ protected:
+  // Creates a new extension storage object and adds a record of the extension
+  // to the extension service.
+  SyncableExtensionSettingsStorage* GetStorage(
+      const std::string& extension_id) {
+    return static_cast<SyncableExtensionSettingsStorage*>(
+        settings_->GetStorage(extension_id));
+  }
+
+  MockSyncChangeProcessor sync_;
+  scoped_ptr<ExtensionSettings> settings_;
+
+  // Gets all the sync data from settings_ as a map from extension id to its
+  // sync data.
+  std::map<std::string, ExtensionSettingSyncDataList> GetAllSyncData() {
+    SyncDataList as_list =
+        settings_->GetAllSyncData(syncable::EXTENSION_SETTINGS);
+    std::map<std::string, ExtensionSettingSyncDataList> as_map;
+    for (SyncDataList::iterator it = as_list.begin();
+        it != as_list.end(); ++it) {
+      ExtensionSettingSyncData sync_data(*it);
+      as_map[sync_data.extension_id()].push_back(sync_data);
+    }
+    return as_map;
+  }
+
+ private:
+  ScopedTempDir temp_dir_;
+
+  // Need these so that the DCHECKs for running on FILE or UI threads pass.
+  MessageLoop message_loop_;
+  BrowserThread ui_thread_;
+  BrowserThread file_thread_;
+};
+
+TEST_F(ExtensionSettingsSyncTest, NoDataDoesNotInvokeSync) {
+  ASSERT_EQ(0u, GetAllSyncData().size());
+
+  // Have one extension created before sync is set up, the other created after.
+  GetStorage("s1");
+  ASSERT_EQ(0u, GetAllSyncData().size());
+
+  settings_->MergeDataAndStartSyncing(
+      syncable::EXTENSION_SETTINGS,
+      SyncDataList(),
+      &sync_);
+
+  GetStorage("s2");
+  ASSERT_EQ(0u, GetAllSyncData().size());
+
+  settings_->StopSyncing(syncable::EXTENSION_SETTINGS);
+
+  ASSERT_EQ(0u, sync_.changes().size());
+  ASSERT_EQ(0u, GetAllSyncData().size());
+}
+
+TEST_F(ExtensionSettingsSyncTest, InSyncDataDoesNotInvokeSync) {
+  StringValue value1("fooValue");
+  ListValue value2;
+  value2.Append(StringValue::CreateStringValue("barValue"));
+
+  SyncableExtensionSettingsStorage* storage1 = GetStorage("s1");
+  SyncableExtensionSettingsStorage* storage2 = GetStorage("s2");
+
+  storage1->Set("foo", value1);
+  storage2->Set("bar", value2);
+
+  std::map<std::string, ExtensionSettingSyncDataList> all_sync_data =
+      GetAllSyncData();
+  ASSERT_EQ(2u, all_sync_data.size());
+  ASSERT_EQ(1u, all_sync_data["s1"].size());
+  ASSERT_PRED_FORMAT2(ValuesEq, &value1, &all_sync_data["s1"][0].value());
+  ASSERT_EQ(1u, all_sync_data["s2"].size());
+  ASSERT_PRED_FORMAT2(ValuesEq, &value2, &all_sync_data["s2"][0].value());
+
+  SyncDataList sync_data;
+  sync_data.push_back(extension_settings_sync_util::CreateData(
+      "s1", "foo", value1));
+  sync_data.push_back(extension_settings_sync_util::CreateData(
+      "s2", "bar", value2));
+
+  settings_->MergeDataAndStartSyncing(
+      syncable::EXTENSION_SETTINGS, sync_data, &sync_);
+  settings_->StopSyncing(syncable::EXTENSION_SETTINGS);
+
+  // Already in sync, so no changes.
+  ASSERT_EQ(0u, sync_.changes().size());
+}
+
+TEST_F(ExtensionSettingsSyncTest, LocalDataWithNoSyncDataIsPushedToSync) {
+  StringValue value1("fooValue");
+  ListValue value2;
+  value2.Append(StringValue::CreateStringValue("barValue"));
+
+  SyncableExtensionSettingsStorage* storage1 = GetStorage("s1");
+  SyncableExtensionSettingsStorage* storage2 = GetStorage("s2");
+
+  storage1->Set("foo", value1);
+  storage2->Set("bar", value2);
+
+  settings_->MergeDataAndStartSyncing(
+      syncable::EXTENSION_SETTINGS, SyncDataList(), &sync_);
+
+  // All settings should have been pushed to sync.
+  ASSERT_EQ(2u, sync_.changes().size());
+  ExtensionSettingSyncData change = sync_.GetOnlyChange("s1", "foo");
+  ASSERT_EQ(SyncChange::ACTION_ADD, change.change_type());
+  ASSERT_TRUE(value1.Equals(&change.value()));
+  change = sync_.GetOnlyChange("s2", "bar");
+  ASSERT_EQ(SyncChange::ACTION_ADD, change.change_type());
+  ASSERT_TRUE(value2.Equals(&change.value()));
+
+  settings_->StopSyncing(syncable::EXTENSION_SETTINGS);
+}
+
+TEST_F(ExtensionSettingsSyncTest, AnySyncDataOverwritesLocalData) {
+  StringValue value1("fooValue");
+  ListValue value2;
+  value2.Append(StringValue::CreateStringValue("barValue"));
+
+  // Maintain dictionaries mirrored to the expected values of the settings in
+  // each storage area.
+  DictionaryValue expected1, expected2;
+
+  // Pre-populate one of the storage areas.
+  SyncableExtensionSettingsStorage* storage1 = GetStorage("s1");
+  storage1->Set("overwriteMe", value1);
+
+  SyncDataList sync_data;
+  sync_data.push_back(extension_settings_sync_util::CreateData(
+      "s1", "foo", value1));
+  sync_data.push_back(extension_settings_sync_util::CreateData(
+      "s2", "bar", value2));
+  settings_->MergeDataAndStartSyncing(
+      syncable::EXTENSION_SETTINGS, sync_data, &sync_);
+  expected1.Set("foo", value1.DeepCopy());
+  expected2.Set("bar", value2.DeepCopy());
+
+  SyncableExtensionSettingsStorage* storage2 = GetStorage("s2");
+
+  // All changes should be local, so no sync changes.
+  ASSERT_EQ(0u, sync_.changes().size());
+
+  // Sync settings should have been pushed to local settings.
+  ASSERT_PRED_FORMAT2(SettingsEq, &expected1, storage1->Get());
+  ASSERT_PRED_FORMAT2(SettingsEq, &expected2, storage2->Get());
+
+  settings_->StopSyncing(syncable::EXTENSION_SETTINGS);
+}
+
+TEST_F(ExtensionSettingsSyncTest, ProcessSyncChanges) {
+  StringValue value1("fooValue");
+  ListValue value2;
+  value2.Append(StringValue::CreateStringValue("barValue"));
+
+  // Maintain dictionaries mirrored to the expected values of the settings in
+  // each storage area.
+  DictionaryValue expected1, expected2;
+
+  // Make storage1 initialised from local data, storage2 initialised from sync.
+  SyncableExtensionSettingsStorage* storage1 = GetStorage("s1");
+  SyncableExtensionSettingsStorage* storage2 = GetStorage("s2");
+
+  storage1->Set("foo", value1);
+  expected1.Set("foo", value1.DeepCopy());
+
+  SyncDataList sync_data;
+  sync_data.push_back(extension_settings_sync_util::CreateData(
+      "s2", "bar", value2));
+
+  settings_->MergeDataAndStartSyncing(
+      syncable::EXTENSION_SETTINGS, sync_data, &sync_);
+  expected2.Set("bar", value2.DeepCopy());
+
+  // Make sync add some settings.
+  SyncChangeList change_list;
+  change_list.push_back(extension_settings_sync_util::CreateAdd(
+      "s1", "bar", value2));
+  change_list.push_back(extension_settings_sync_util::CreateAdd(
+      "s2", "foo", value1));
+  settings_->ProcessSyncChanges(FROM_HERE, change_list);
+  expected1.Set("bar", value2.DeepCopy());
+  expected2.Set("foo", value1.DeepCopy());
+
+  ASSERT_PRED_FORMAT2(SettingsEq, &expected1, storage1->Get());
+  ASSERT_PRED_FORMAT2(SettingsEq, &expected2, storage2->Get());
+
+  // Make sync update some settings, storage1 the new setting, storage2 the
+  // initial setting.
+  change_list.clear();
+  change_list.push_back(extension_settings_sync_util::CreateUpdate(
+      "s1", "bar", value2));
+  change_list.push_back(extension_settings_sync_util::CreateUpdate(
+      "s2", "bar", value1));
+  settings_->ProcessSyncChanges(FROM_HERE, change_list);
+  expected1.Set("bar", value2.DeepCopy());
+  expected2.Set("bar", value1.DeepCopy());
+
+  ASSERT_PRED_FORMAT2(SettingsEq, &expected1, storage1->Get());
+  ASSERT_PRED_FORMAT2(SettingsEq, &expected2, storage2->Get());
+
+  // Make sync remove some settings, storage1 the initial setting, storage2 the
+  // new setting.
+  change_list.clear();
+  change_list.push_back(extension_settings_sync_util::CreateDelete(
+      "s1", "foo"));
+  change_list.push_back(extension_settings_sync_util::CreateDelete(
+      "s2", "foo"));
+  settings_->ProcessSyncChanges(FROM_HERE, change_list);
+  expected1.Remove("foo", NULL);
+  expected2.Remove("foo", NULL);
+
+  ASSERT_PRED_FORMAT2(SettingsEq, &expected1, storage1->Get());
+  ASSERT_PRED_FORMAT2(SettingsEq, &expected2, storage2->Get());
+
+  settings_->StopSyncing(syncable::EXTENSION_SETTINGS);
+}
+
+TEST_F(ExtensionSettingsSyncTest, PushToSync) {
+  StringValue value1("fooValue");
+  ListValue value2;
+  value2.Append(StringValue::CreateStringValue("barValue"));
+
+  // Make storage1/2 initialised from local data, storage3/4 initialised from
+  // sync.
+  SyncableExtensionSettingsStorage* storage1 = GetStorage("s1");
+  SyncableExtensionSettingsStorage* storage2 = GetStorage("s2");
+  SyncableExtensionSettingsStorage* storage3 = GetStorage("s3");
+  SyncableExtensionSettingsStorage* storage4 = GetStorage("s4");
+
+  storage1->Set("foo", value1);
+  storage2->Set("foo", value1);
+
+  SyncDataList sync_data;
+  sync_data.push_back(extension_settings_sync_util::CreateData(
+      "s3", "bar", value2));
+  sync_data.push_back(extension_settings_sync_util::CreateData(
+      "s4", "bar", value2));
+
+  settings_->MergeDataAndStartSyncing(
+      syncable::EXTENSION_SETTINGS, sync_data, &sync_);
+
+  // Add something locally.
+  storage1->Set("bar", value2);
+  storage2->Set("bar", value2);
+  storage3->Set("foo", value1);
+  storage4->Set("foo", value1);
+
+  ExtensionSettingSyncData change = sync_.GetOnlyChange("s1", "bar");
+    ASSERT_EQ(SyncChange::ACTION_ADD, change.change_type());
+    ASSERT_TRUE(value2.Equals(&change.value()));
+  sync_.GetOnlyChange("s2", "bar");
+    ASSERT_EQ(SyncChange::ACTION_ADD, change.change_type());
+    ASSERT_TRUE(value2.Equals(&change.value()));
+  change = sync_.GetOnlyChange("s3", "foo");
+    ASSERT_EQ(SyncChange::ACTION_ADD, change.change_type());
+    ASSERT_TRUE(value1.Equals(&change.value()));
+  change = sync_.GetOnlyChange("s4", "foo");
+    ASSERT_EQ(SyncChange::ACTION_ADD, change.change_type());
+    ASSERT_TRUE(value1.Equals(&change.value()));
+
+  // Change something locally, storage1/3 the new setting and storage2/4 the
+  // initial setting, for all combinations of local vs sync intialisation and
+  // new vs initial.
+  sync_.ClearChanges();
+  storage1->Set("bar", value1);
+  storage2->Set("foo", value2);
+  storage3->Set("bar", value1);
+  storage4->Set("foo", value2);
+
+  change = sync_.GetOnlyChange("s1", "bar");
+    ASSERT_EQ(SyncChange::ACTION_UPDATE, change.change_type());
+    ASSERT_TRUE(value1.Equals(&change.value()));
+  change = sync_.GetOnlyChange("s2", "foo");
+    ASSERT_EQ(SyncChange::ACTION_UPDATE, change.change_type());
+    ASSERT_TRUE(value2.Equals(&change.value()));
+  change = sync_.GetOnlyChange("s3", "bar");
+    ASSERT_EQ(SyncChange::ACTION_UPDATE, change.change_type());
+    ASSERT_TRUE(value1.Equals(&change.value()));
+  change = sync_.GetOnlyChange("s4", "foo");
+    ASSERT_EQ(SyncChange::ACTION_UPDATE, change.change_type());
+    ASSERT_TRUE(value2.Equals(&change.value()));
+
+  // Remove something locally, storage1/3 the new setting and storage2/4 the
+  // initial setting, for all combinations of local vs sync intialisation and
+  // new vs initial.
+  sync_.ClearChanges();
+  storage1->Remove("foo");
+  storage2->Remove("bar");
+  storage3->Remove("foo");
+  storage4->Remove("bar");
+
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s1", "foo").change_type());
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s2", "bar").change_type());
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s3", "foo").change_type());
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s4", "bar").change_type());
+
+  // Remove some nonexistent settings.
+  sync_.ClearChanges();
+  storage1->Remove("foo");
+  storage2->Remove("bar");
+  storage3->Remove("foo");
+  storage4->Remove("bar");
+
+  ASSERT_EQ(0u, sync_.changes().size());
+
+  // Clear the rest of the settings.  Add the removed ones back first so that
+  // more than one setting is cleared.
+  storage1->Set("foo", value1);
+  storage2->Set("bar", value2);
+  storage3->Set("foo", value1);
+  storage4->Set("bar", value2);
+
+  sync_.ClearChanges();
+  storage1->Clear();
+  storage2->Clear();
+  storage3->Clear();
+  storage4->Clear();
+
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s1", "foo").change_type());
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s1", "bar").change_type());
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s2", "foo").change_type());
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s2", "bar").change_type());
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s3", "foo").change_type());
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s3", "bar").change_type());
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s4", "foo").change_type());
+  ASSERT_EQ(
+      SyncChange::ACTION_DELETE,
+      sync_.GetOnlyChange("s4", "bar").change_type());
+
+  settings_->StopSyncing(syncable::EXTENSION_SETTINGS);
+}