File: tab_rank_dispatcher_unittest.cc

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// Copyright 2023 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/segmentation_platform/embedder/input_delegate/tab_rank_dispatcher.h"
#include <memory>

#include "base/functional/bind.h"
#include "base/memory/raw_ptr.h"
#include "base/strings/string_util.h"
#include "base/test/gmock_callback_support.h"
#include "base/time/time.h"
#include "components/segmentation_platform/embedder/tab_fetcher.h"
#include "components/segmentation_platform/public/constants.h"
#include "components/segmentation_platform/public/result.h"
#include "components/segmentation_platform/public/testing/mock_segmentation_platform_service.h"
#include "components/segmentation_platform/public/trigger.h"
#include "components/sessions/core/session_id.h"
#include "components/sessions/core/session_types.h"
#include "components/sync_sessions/synced_session.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace segmentation_platform {

namespace {

using ::testing::_;
using ::testing::Return;

constexpr char kLocalTabName[] = "local";
constexpr char kRemoteTabName1[] = "remote_1";
constexpr char kRemoteTabName2[] = "remote_2";
const base::TimeDelta kTime1 = base::Minutes(15);
const base::TimeDelta kTime2 = base::Minutes(10);
const base::TimeDelta kTime3 = base::Minutes(5);
const TrainingRequestId kTestRequestId = TrainingRequestId::FromUnsafeValue(5);

std::unique_ptr<sync_sessions::SyncedSession> CreateNewSession(
    const std::string& tab_guid,
    const base::Time& session_time) {
  auto session = std::make_unique<sync_sessions::SyncedSession>();
  session->SetModifiedTime(session_time);
  session->SetSessionTag(tab_guid);
  auto window = std::make_unique<sync_sessions::SyncedSessionWindow>();
  auto tab = std::make_unique<sessions::SessionTab>();
  tab->timestamp = session_time;
  tab->guid = tab_guid;
  window->wrapped_window.tabs.push_back(std::move(tab));
  session->windows[SessionID::NewUnique()] = std::move(window);
  return session;
}

const sessions::SessionTab* GetTab(
    const sync_sessions::SyncedSession* session) {
  return session->windows.begin()->second->wrapped_window.tabs[0].get();
}

class MockSessionSyncService : public sync_sessions::SessionSyncService {
 public:
  MockSessionSyncService() = default;
  ~MockSessionSyncService() override = default;

  MOCK_METHOD(syncer::GlobalIdMapper*,
              GetGlobalIdMapper,
              (),
              (const, override));
  MOCK_METHOD(sync_sessions::OpenTabsUIDelegate*,
              GetOpenTabsUIDelegate,
              (),
              (override));
  MOCK_METHOD(base::CallbackListSubscription,
              SubscribeToForeignSessionsChanged,
              (const base::RepeatingClosure& cb),
              (override));
  MOCK_METHOD(base::WeakPtr<syncer::DataTypeControllerDelegate>,
              GetControllerDelegate,
              ());
};

class MockOpenTabsUIDelegate : public sync_sessions::OpenTabsUIDelegate {
 public:
  MockOpenTabsUIDelegate() {
    local_session_ =
        CreateNewSession(kLocalTabName, base::Time::Now() - kTime2);
    session_to_tab_[kLocalTabName] = GetTab(local_session_.get());
    foreign_sessions_owned_.push_back(
        CreateNewSession(kRemoteTabName1, base::Time::Now() - kTime1));
    foreign_sessions_.push_back(foreign_sessions_owned_.back().get());
    session_to_tab_[kRemoteTabName1] =
        GetTab(foreign_sessions_owned_.back().get());
    foreign_sessions_owned_.push_back(
        CreateNewSession(kRemoteTabName2, base::Time::Now() - kTime3));
    foreign_sessions_.push_back(foreign_sessions_owned_.back().get());
    session_to_tab_[kRemoteTabName2] =
        GetTab(foreign_sessions_owned_.back().get());
  }

  bool GetAllForeignSessions(
      std::vector<raw_ptr<const sync_sessions::SyncedSession,
                          VectorExperimental>>* sessions) override {
    *sessions = foreign_sessions_;
    std::ranges::sort(*sessions, std::greater(),
                      [](const sync_sessions::SyncedSession* session) {
                        return session->GetModifiedTime();
                      });

    return !sessions->empty();
  }

  bool GetLocalSession(
      const sync_sessions::SyncedSession** local_session) override {
    *local_session = local_session_.get();
    return *local_session != nullptr;
  }

  bool GetForeignTab(const std::string& tag,
                     const SessionID tab_id,
                     const sessions::SessionTab** tab) override {
    auto it = session_to_tab_.find(tag);
    EXPECT_TRUE(it != session_to_tab_.end());
    *tab = it->second;
    return true;
  }

  MOCK_METHOD1(DeleteForeignSession, void(const std::string& tag));

  MOCK_METHOD1(
      GetForeignSession,
      std::vector<const sessions::SessionWindow*>(const std::string& tag));

  MOCK_METHOD2(GetForeignSessionTabs,
               bool(const std::string& tag,
                    std::vector<const sessions::SessionTab*>* tabs));

 private:
  std::vector<std::unique_ptr<sync_sessions::SyncedSession>>
      foreign_sessions_owned_;
  std::vector<raw_ptr<const sync_sessions::SyncedSession, VectorExperimental>>
      foreign_sessions_;
  std::unique_ptr<sync_sessions::SyncedSession> local_session_;
  std::map<std::string, raw_ptr<const sessions::SessionTab, CtnExperimental>>
      session_to_tab_;
};

AnnotatedNumericResult CreateResult(float val) {
  AnnotatedNumericResult result(PredictionStatus::kSucceeded);
  result.result.mutable_output_config()
      ->mutable_predictor()
      ->mutable_generic_predictor()
      ->add_output_labels(kTabResumptionClassifierKey);
  result.result.add_result(val);
  result.request_id = kTestRequestId;
  return result;
}

}  // namespace

class TabRankDispatcherTest : public testing::Test {
 public:
  TabRankDispatcherTest() {
    EXPECT_CALL(session_sync_service_, GetOpenTabsUIDelegate())
        .WillRepeatedly(Return(&open_tabs_delegate_));
  }
  ~TabRankDispatcherTest() override = default;

 protected:
  MockSessionSyncService session_sync_service_;
  MockOpenTabsUIDelegate open_tabs_delegate_;
  MockSegmentationPlatformService segmentation_service_;
};

TEST_F(TabRankDispatcherTest, RankTabs) {
  TabRankDispatcher dispatcher(
      &segmentation_service_, &session_sync_service_,
      std::make_unique<TabFetcher>(&session_sync_service_));
  TabRankDispatcher::TabFilter filter;

  testing::InSequence s;
  EXPECT_CALL(segmentation_service_, GetAnnotatedNumericResult(_, _, _, _))
      .WillOnce(base::test::RunOnceCallback<3>(CreateResult(0.3f)));
  EXPECT_CALL(segmentation_service_, GetAnnotatedNumericResult(_, _, _, _))
      .WillOnce(base::test::RunOnceCallback<3>(CreateResult(0.5f)));
  EXPECT_CALL(segmentation_service_, GetAnnotatedNumericResult(_, _, _, _))
      .WillOnce(base::test::RunOnceCallback<3>(CreateResult(0.6f)));

  dispatcher.GetTopRankedTabs(
      kTabResumptionClassifierKey, filter,
      base::BindOnce(
          [](TabFetcher* fetcher, bool success,
             std::multiset<TabRankDispatcher::RankedTab> tabs) {
            ASSERT_EQ(tabs.size(), 3u);
            auto tab1 = fetcher->FindTab(tabs.begin()->tab);
            auto tab2 = fetcher->FindTab((++tabs.begin())->tab);
            auto tab3 = fetcher->FindTab(tabs.rbegin()->tab);
            EXPECT_EQ(tab1.session_tab->guid, kLocalTabName);
            EXPECT_NEAR(tabs.begin()->model_score, 0.6, 0.001);
            EXPECT_EQ(tab2.session_tab->guid, kRemoteTabName1);
            EXPECT_NEAR((++tabs.begin())->model_score, 0.5, 0.001);
            EXPECT_EQ(tab3.session_tab->guid, kRemoteTabName2);
            EXPECT_NEAR(tabs.rbegin()->model_score, 0.3, 0.001);
            EXPECT_EQ(tabs.begin()->request_id, kTestRequestId);
          },
          dispatcher.tab_fetcher()));
}

TEST_F(TabRankDispatcherTest, FilterTabs) {
  TabRankDispatcher dispatcher(
      &segmentation_service_, &session_sync_service_,
      std::make_unique<TabFetcher>(&session_sync_service_));
  TabRankDispatcher::TabFilter filter =
      base::BindRepeating([](const TabFetcher::Tab& tab) {
        return tab.time_since_modified <= kTime2 + base::Seconds(1);
      });

  testing::InSequence s;
  EXPECT_CALL(segmentation_service_, GetAnnotatedNumericResult(_, _, _, _))
      .WillOnce(base::test::RunOnceCallback<3>(CreateResult(0.5f)));
  EXPECT_CALL(segmentation_service_, GetAnnotatedNumericResult(_, _, _, _))
      .WillOnce(base::test::RunOnceCallback<3>(CreateResult(0.6f)));

  dispatcher.GetTopRankedTabs(
      kTabResumptionClassifierKey, filter,
      base::BindOnce(
          [](TabFetcher* fetcher, bool success,
             std::multiset<TabRankDispatcher::RankedTab> tabs) {
            ASSERT_EQ(tabs.size(), 2u);
            auto tab1 = fetcher->FindTab(tabs.begin()->tab);
            auto tab2 = fetcher->FindTab(tabs.rbegin()->tab);
            EXPECT_EQ(tab1.session_tab->guid, kLocalTabName);
            EXPECT_NEAR(tabs.begin()->model_score, 0.6, 0.001);
            EXPECT_EQ(tab2.session_tab->guid, kRemoteTabName2);
            EXPECT_NEAR(tabs.rbegin()->model_score, 0.5, 0.001);
          },
          dispatcher.tab_fetcher()));
}

TEST_F(TabRankDispatcherTest, TabsWithSameScore) {
  TabRankDispatcher dispatcher(
      &segmentation_service_, &session_sync_service_,
      std::make_unique<TabFetcher>(&session_sync_service_));
  TabRankDispatcher::TabFilter filter;

  testing::InSequence s;
  EXPECT_CALL(segmentation_service_, GetAnnotatedNumericResult(_, _, _, _))
      .WillOnce(base::test::RunOnceCallback<3>(CreateResult(0.3f)));
  EXPECT_CALL(segmentation_service_, GetAnnotatedNumericResult(_, _, _, _))
      .WillOnce(base::test::RunOnceCallback<3>(CreateResult(0.3f)));
  EXPECT_CALL(segmentation_service_, GetAnnotatedNumericResult(_, _, _, _))
      .WillOnce(base::test::RunOnceCallback<3>(CreateResult(0.6f)));

  dispatcher.GetTopRankedTabs(
      kTabResumptionClassifierKey, filter,
      base::BindOnce(
          [](TabFetcher* fetcher, bool success,
             std::multiset<TabRankDispatcher::RankedTab> tabs) {
            ASSERT_EQ(tabs.size(), 3u);
            auto tab1 = fetcher->FindTab(tabs.begin()->tab);
            auto tab2 = fetcher->FindTab((++tabs.begin())->tab);
            auto tab3 = fetcher->FindTab(tabs.rbegin()->tab);
            EXPECT_EQ(tab1.session_tab->guid, kLocalTabName);
            EXPECT_NEAR(tabs.begin()->model_score, 0.6, 0.001);
            EXPECT_TRUE(base::StartsWith(tab2.session_tab->guid, "remote_"));
            EXPECT_NEAR((++tabs.begin())->model_score, 0.3, 0.001);
            EXPECT_TRUE(base::StartsWith(tab3.session_tab->guid, "remote_"));
            EXPECT_NEAR(tabs.rbegin()->model_score, 0.3, 0.001);
          },
          dispatcher.tab_fetcher()));
}

}  // namespace segmentation_platform