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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/feature_engagement/internal/event_storage_migration.h"
#include "base/functional/bind.h"
#include "base/test/metrics/histogram_tester.h"
#include "components/feature_engagement/internal/proto/feature_event.pb.h"
#include "components/feature_engagement/internal/test/event_util.h"
#include "components/leveldb_proto/public/proto_database.h"
#include "components/leveldb_proto/testing/fake_db.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace feature_engagement {
namespace {
// Name of the histogram that records the status of the migration of events from
// profile storage to event storage.
const char kEventStorageMigrationStatusHistogramName[] =
"InProductHelp.EventStorageMigration.Status";
// Verifies that two event maps are equal. It checks that they have the same
// size and that for every key in map1, the corresponding Event value in map2
// is identical.
void VerifyEventMapsEqual(const std::map<std::string, Event>& map1,
const std::map<std::string, Event>& map2) {
ASSERT_EQ(map1.size(), map2.size());
for (const auto& pair1 : map1) {
const auto& it = map2.find(pair1.first);
ASSERT_NE(map2.end(), it);
test::VerifyEventsEqual(&pair1.second, &it->second);
}
}
} // namespace
class EventStorageMigrationTest : public testing::Test {
public:
EventStorageMigrationTest() {
load_callback_ = base::BindOnce(
&EventStorageMigrationTest::MigrationCallback, base::Unretained(this));
}
EventStorageMigrationTest(const EventStorageMigrationTest&) = delete;
EventStorageMigrationTest& operator=(const EventStorageMigrationTest&) =
delete;
~EventStorageMigrationTest() override = default;
void SetUp() override {
profile_db_ =
std::make_unique<leveldb_proto::test::FakeDB<Event>>(&profile_events_);
device_db_ =
std::make_unique<leveldb_proto::test::FakeDB<Event>>(&device_events_);
event_storage_migration_ = std::make_unique<EventStorageMigration>(
profile_db_.get(), device_db_.get());
}
void TearDown() override {
device_events_.clear();
profile_events_.clear();
event_storage_migration_ = nullptr;
}
protected:
void MigrationCallback(bool success) { migration_success_ = success; }
std::unique_ptr<EventStorageMigration> event_storage_migration_;
std::map<std::string, Event> profile_events_;
std::map<std::string, Event> device_events_;
std::unique_ptr<leveldb_proto::test::FakeDB<Event>> profile_db_;
std::unique_ptr<leveldb_proto::test::FakeDB<Event>> device_db_;
bool migration_success_;
EventStorageMigration::MigrationCallback load_callback_;
};
TEST_F(EventStorageMigrationTest,
SuccessfullyMigrateProfileEventsToDeviceStorage) {
base::HistogramTester histogram_tester;
// Populate fake Event entries.
Event event1;
event1.set_name("event1");
test::SetEventCountForDay(&event1, 1, 1);
Event event2;
event2.set_name("event2");
test::SetEventCountForDay(&event2, 1, 3);
test::SetEventCountForDay(&event2, 2, 5);
profile_events_.insert(std::pair<std::string, Event>(event1.name(), event1));
profile_events_.insert(std::pair<std::string, Event>(event2.name(), event2));
event_storage_migration_->Migrate(std::move(load_callback_));
profile_db_->InitStatusCallback(leveldb_proto::Enums::InitStatus::kOK);
device_db_->InitStatusCallback(leveldb_proto::Enums::InitStatus::kOK);
profile_db_->LoadCallback(true);
device_db_->UpdateCallback(true);
// Validate that the events from profile db have been copied to device db.
VerifyEventMapsEqual(device_events_, profile_events_);
EXPECT_TRUE(migration_success_);
histogram_tester.ExpectBucketCount(
kEventStorageMigrationStatusHistogramName,
static_cast<int>(
EventStorageMigration::EventStorageMigrationStatus::kCompleted),
1);
}
TEST_F(EventStorageMigrationTest, InitializationErrorDuringMigration) {
base::HistogramTester histogram_tester;
// Populate fake Event entries.
Event event1;
event1.set_name("event1");
test::SetEventCountForDay(&event1, 1, 1);
Event event2;
event2.set_name("event2");
test::SetEventCountForDay(&event2, 1, 3);
test::SetEventCountForDay(&event2, 2, 5);
profile_events_.insert(std::pair<std::string, Event>(event1.name(), event1));
profile_events_.insert(std::pair<std::string, Event>(event2.name(), event2));
event_storage_migration_->Migrate(std::move(load_callback_));
profile_db_->InitStatusCallback(leveldb_proto::Enums::InitStatus::kOK);
device_db_->InitStatusCallback(leveldb_proto::Enums::InitStatus::kError);
EXPECT_FALSE(migration_success_);
histogram_tester.ExpectBucketCount(
kEventStorageMigrationStatusHistogramName,
static_cast<int>(EventStorageMigration::EventStorageMigrationStatus::
kFailedToInitialize),
1);
}
TEST_F(EventStorageMigrationTest, EventLoadingErrorDuringMigration) {
base::HistogramTester histogram_tester;
// Populate fake Event entries.
Event event1;
event1.set_name("event1");
test::SetEventCountForDay(&event1, 1, 1);
Event event2;
event2.set_name("event2");
test::SetEventCountForDay(&event2, 1, 3);
test::SetEventCountForDay(&event2, 2, 5);
profile_events_.insert(std::pair<std::string, Event>(event1.name(), event1));
profile_events_.insert(std::pair<std::string, Event>(event2.name(), event2));
event_storage_migration_->Migrate(std::move(load_callback_));
profile_db_->InitStatusCallback(leveldb_proto::Enums::InitStatus::kOK);
device_db_->InitStatusCallback(leveldb_proto::Enums::InitStatus::kOK);
profile_db_->LoadCallback(false);
EXPECT_FALSE(migration_success_);
histogram_tester.ExpectBucketCount(
kEventStorageMigrationStatusHistogramName,
static_cast<int>(
EventStorageMigration::EventStorageMigrationStatus::kFailedToLoad),
1);
}
TEST_F(EventStorageMigrationTest, WritingEventErrorDuringMigration) {
base::HistogramTester histogram_tester;
// Populate fake Event entries.
Event event1;
event1.set_name("event1");
test::SetEventCountForDay(&event1, 1, 1);
Event event2;
event2.set_name("event2");
test::SetEventCountForDay(&event2, 1, 3);
test::SetEventCountForDay(&event2, 2, 5);
profile_events_.insert(std::pair<std::string, Event>(event1.name(), event1));
profile_events_.insert(std::pair<std::string, Event>(event2.name(), event2));
event_storage_migration_->Migrate(std::move(load_callback_));
profile_db_->InitStatusCallback(leveldb_proto::Enums::InitStatus::kOK);
device_db_->InitStatusCallback(leveldb_proto::Enums::InitStatus::kOK);
profile_db_->LoadCallback(true);
device_db_->UpdateCallback(false);
EXPECT_FALSE(migration_success_);
histogram_tester.ExpectBucketCount(
kEventStorageMigrationStatusHistogramName,
static_cast<int>(
EventStorageMigration::EventStorageMigrationStatus::kFailedToWrite),
1);
}
} // namespace feature_engagement
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