Adding a user list (to be consumed by GCM Client Implementation)

google_apis/gcm/engine/user_list_unittest.cc

Index: google_apis/gcm/engine/user_list_unittest.cc
diff --git a/google_apis/gcm/engine/user_list_unittest.cc b/google_apis/gcm/engine/user_list_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..09947b987a4889921eb7f7f72be6dbbc1ffed431
--- /dev/null
+++ b/google_apis/gcm/engine/user_list_unittest.cc
@@ -0,0 +1,370 @@
+// 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 "google_apis/gcm/engine/user_list.h"
+
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/callback_forward.h"
+#include "base/files/file_path.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "google_apis/gcm/engine/gcm_store_impl.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace gcm {
+
+namespace {
+
+class GCMClientDelegate : public GCMClient::Delegate {
+ public:
+  explicit GCMClientDelegate(const std::string& username);
+  virtual ~GCMClientDelegate();
+
+  const std::string& GetUsername() const { return username_; }
+
+  // Overrides of GCMClientDelegate:
+  virtual void OnCheckInFinished(const GCMClient::CheckinInfo& checkin_info,
+                                 GCMClient::Result result) OVERRIDE {}
+  virtual void OnRegisterFinished(const std::string& app_id,
+                                  const std::string& registration_id,
+                                  GCMClient::Result result) OVERRIDE {}
+  virtual void OnSendFinished(const std::string& app_id,
+                              const std::string& message_id,
+                              GCMClient::Result result) OVERRIDE {}
+  virtual void OnMessageReceived(const std::string& app_id,
+                                 const GCMClient::IncomingMessage& message)
+      OVERRIDE {}
+  virtual void OnMessagesDeleted(const std::string& app_id) OVERRIDE {}
+  virtual void OnMessageSendError(const std::string& app_id,
+                                  const std::string& message_id,
+                                  GCMClient::Result result) OVERRIDE {}
+  virtual GCMClient::CheckinInfo GetCheckinInfo() const OVERRIDE {
+    return GCMClient::CheckinInfo();
+  }
+  virtual void OnLoadingCompleted() OVERRIDE {}
+  virtual base::TaskRunner* GetFileTaskRunner() OVERRIDE { return NULL; }
+
+ private:
+  std::string username_;
+};
+
+}  // namespace
+
+class UserListTest : public testing::Test {
+ public:
+  UserListTest();
+  virtual ~UserListTest();
+
+  virtual void SetUp() OVERRIDE;
+
+  static size_t GetListSize(const UserList* user_list);
+  void SetDelegateCallback(const std::string& username,
+                           int64 user_serial_number);
+
+  scoped_ptr<UserList> BuildUserList();
+
+  void PumpLoop();
+
+  void UpdateCallback(bool success);
+
+  void Initialize(UserList* user_list, const GCMStore::LoadResult& result);
+
+  void ResetLoop();
+
+ protected:
+  int64 last_assigned_serial_number_;
+  std::string last_assigned_username_;
+  scoped_ptr<GCMStore> gcm_store_;
+
+ private:
+  base::ScopedTempDir temp_directory_;
+  base::MessageLoop message_loop_;
+  scoped_ptr<base::RunLoop> run_loop_;
+};
+
+UserListTest::UserListTest()
+    : last_assigned_serial_number_(gcm::kInvalidSerialNumber) {}
+
+UserListTest::~UserListTest() {}
+
+void UserListTest::SetUp() {
+  ASSERT_TRUE(temp_directory_.CreateUniqueTempDir());
+}
+
+// static
+size_t UserListTest::GetListSize(const UserList* user_list) {
+  return user_list->delegates_.size();
+}
+
+void UserListTest::SetDelegateCallback(const std::string& username,
+                                       int64 user_serial_number) {
+  last_assigned_username_ = username;
+  last_assigned_serial_number_ = user_serial_number;
+  ResetLoop();
+}
+
+scoped_ptr<UserList> UserListTest::BuildUserList() {
+  gcm_store_.reset(new GCMStoreImpl(temp_directory_.path(),
+                                    message_loop_.message_loop_proxy()));
+  return scoped_ptr<UserList>(new UserList(gcm_store_.get()));
+}
+
+void UserListTest::Initialize(UserList* user_list,
+                              const GCMStore::LoadResult& result) {
+  ASSERT_TRUE(result.success);
+  user_list->Initialize(result.serial_number_mappings);
+  ResetLoop();
+}
+
+void UserListTest::ResetLoop() {
+  if (run_loop_ && run_loop_->running())
+    run_loop_->Quit();
+}
+
+void UserListTest::PumpLoop() {
+  run_loop_.reset(new base::RunLoop);
+  run_loop_->Run();
+}
+
+void UserListTest::UpdateCallback(bool success) { ASSERT_TRUE(success); }
+
+GCMClientDelegate::GCMClientDelegate(const std::string& username)
+    : username_(username) {}
+
+GCMClientDelegate::~GCMClientDelegate() {}
+
+// Make sure it is possible to add a delegate, and that it is assigned a serial
+// number.
+TEST_F(UserListTest, SetDelegateAndCheckSerialNumberAssignment) {
+  scoped_ptr<UserList> user_list(BuildUserList());
+  gcm_store_->Load(base::Bind(
+      &UserListTest::Initialize, base::Unretained(this), user_list.get()));
+  PumpLoop();
+
+  // First adding a delegate.
+  scoped_ptr<GCMClientDelegate> delegate(new GCMClientDelegate("test_user_1"));
+  user_list->SetDelegate(
+      delegate->GetUsername(),
+      delegate.get(),
+      base::Bind(&UserListTest::SetDelegateCallback, base::Unretained(this)));
+  PumpLoop();
+
+  // Verify the record was created.
+  EXPECT_EQ(1u, GetListSize(user_list.get()));
+  // Verify username and serial number were assigned.
+  EXPECT_EQ(delegate->GetUsername(), last_assigned_username_);
+  EXPECT_NE(gcm::kInvalidSerialNumber, last_assigned_serial_number_);
+  // Check that a serial number was assigned to delegate.
+  EXPECT_EQ(last_assigned_serial_number_,
+            user_list->GetSerialNumberForUsername(delegate->GetUsername()));
+}
+
+// Get the delegate that was added to the list by both serial number and
+// username.
+TEST_F(UserListTest, GetDelegate) {
+  scoped_ptr<UserList> user_list(BuildUserList());
+  gcm_store_->Load(base::Bind(
+      &UserListTest::Initialize, base::Unretained(this), user_list.get()));
+  PumpLoop();
+
+  // Start by adding a delegate and a serial number.
+  scoped_ptr<GCMClientDelegate> delegate(new GCMClientDelegate("test_user_1"));
+  user_list->SetDelegate(
+      delegate->GetUsername(),
+      delegate.get(),
+      base::Bind(&UserListTest::SetDelegateCallback, base::Unretained(this)));
+  PumpLoop();
+
+  EXPECT_EQ(delegate.get(),
+            user_list->GetDelegateBySerialNumber(last_assigned_serial_number_));
+  EXPECT_EQ(delegate.get(),
+            user_list->GetDelegateByUsername(last_assigned_username_));
+}
+
+// Make sure that correct mapping between username of the delegate and a serial
+// number is preserved when loading the user list. Also verify that setting a
+// delegate after load works correctly. (Finds the existing mapping entry.)
+TEST_F(UserListTest, LoadUserEntrySetDelegate) {
+  scoped_ptr<UserList> user_list(BuildUserList());
+  gcm_store_->Load(base::Bind(
+      &UserListTest::Initialize, base::Unretained(this), user_list.get()));
+  PumpLoop();
+
+  // Start by adding a delegate and a serial number.
+  scoped_ptr<GCMClientDelegate> delegate(new GCMClientDelegate("test_user_1"));
+  user_list->SetDelegate(
+      delegate->GetUsername(),
+      delegate.get(),
+      base::Bind(&UserListTest::SetDelegateCallback, base::Unretained(this)));
+  PumpLoop();
+
+  // Reload the GCM User List.
+  user_list = BuildUserList().Pass();
+  gcm_store_->Load(base::Bind(
+      &UserListTest::Initialize, base::Unretained(this), user_list.get()));
+  PumpLoop();
+
+  // Verify a single record was loaded, with matching username, but no delegate.
+  EXPECT_EQ(1u, GetListSize(user_list.get()));
+  int64 serial_number =
+      user_list->GetSerialNumberForUsername(delegate->GetUsername());
+  EXPECT_EQ(last_assigned_serial_number_, serial_number);
+  EXPECT_EQ(NULL, user_list->GetDelegateBySerialNumber(serial_number));
+  EXPECT_EQ(NULL, user_list->GetDelegateByUsername(delegate->GetUsername()));
+
+  // After loading is complete, Delegates will start adding itself looking for
+  // their serial numbers. Check that correct matches are found and new records
+  // not created.
+  user_list->SetDelegate(
+      delegate->GetUsername(),
+      delegate.get(),
+      base::Bind(&UserListTest::SetDelegateCallback, base::Unretained(this)));
+  PumpLoop();
+
+  EXPECT_EQ(1u, GetListSize(user_list.get()));
+  serial_number =
+      user_list->GetSerialNumberForUsername(delegate->GetUsername());
+  EXPECT_EQ(last_assigned_serial_number_, serial_number);
+  EXPECT_EQ(delegate.get(),
+            user_list->GetDelegateBySerialNumber(serial_number));
+  EXPECT_EQ(delegate.get(),
+            user_list->GetDelegateByUsername(delegate->GetUsername()));
+}
+
+// Check that it is possible to add multiple delegates to the user list.
+TEST_F(UserListTest, AddMultipleDelegates) {
+  scoped_ptr<UserList> user_list(BuildUserList());
+  gcm_store_->Load(base::Bind(
+      &UserListTest::Initialize, base::Unretained(this), user_list.get()));
+  PumpLoop();
+
+  // Start by adding a delegate and a serial number.
+  scoped_ptr<GCMClientDelegate> delegate1(new GCMClientDelegate("test_user_1"));
+  user_list->SetDelegate(
+      delegate1->GetUsername(),
+      delegate1.get(),
+      base::Bind(&UserListTest::SetDelegateCallback, base::Unretained(this)));
+  PumpLoop();
+
+  int64 serial_number1 = last_assigned_serial_number_;
+
+  scoped_ptr<GCMClientDelegate> delegate2(new GCMClientDelegate("test_user_2"));
+  user_list->SetDelegate(
+      delegate2->GetUsername(),
+      delegate2.get(),
+      base::Bind(&UserListTest::SetDelegateCallback, base::Unretained(this)));
+  PumpLoop();
+
+  int64 serial_number2 = last_assigned_serial_number_;
+
+  // Ensuring that serial numbers are different.
+  EXPECT_EQ(2u, GetListSize(user_list.get()));
+
+  // Reading the user entries.
+  user_list = BuildUserList().Pass();
+  gcm_store_->Load(base::Bind(
+      &UserListTest::Initialize, base::Unretained(this), user_list.get()));
+  PumpLoop();
+
+  // Serial numbers stay the same, but there are no delegates assigned.
+  EXPECT_EQ(2u, GetListSize(user_list.get()));
+  EXPECT_EQ(NULL, user_list->GetDelegateByUsername(delegate1->GetUsername()));
+  EXPECT_EQ(NULL, user_list->GetDelegateBySerialNumber(serial_number1));
+  EXPECT_EQ(NULL, user_list->GetDelegateByUsername(delegate2->GetUsername()));
+  EXPECT_EQ(NULL, user_list->GetDelegateBySerialNumber(serial_number2));
+
+  // Setting and checking a delegate on the second user.
+  user_list->SetDelegate(
+      delegate2->GetUsername(),
+      delegate2.get(),
+      base::Bind(&UserListTest::SetDelegateCallback, base::Unretained(this)));
+  PumpLoop();
+
+  // First user still does not have a delegate.
+  EXPECT_EQ(NULL, user_list->GetDelegateByUsername(delegate1->GetUsername()));
+  EXPECT_EQ(NULL, user_list->GetDelegateBySerialNumber(serial_number1));
+  // Second user has a delegate set.
+  EXPECT_EQ(delegate2.get(),
+            user_list->GetDelegateByUsername(delegate2->GetUsername()));
+  EXPECT_EQ(delegate2.get(),
+            user_list->GetDelegateBySerialNumber(serial_number2));
+}
+
+// Adding a delegate before the user list is initialized. Verifies that serial
+// number assignment is postponed until after initialization.
+TEST_F(UserListTest, AddDelegateThenInitializeWithoutSerialNumber) {
+  scoped_ptr<UserList> user_list(BuildUserList());
+
+  // Add a delegate first.
+  scoped_ptr<GCMClientDelegate> delegate(new GCMClientDelegate("test_user_1"));
+  user_list->SetDelegate(
+      delegate->GetUsername(),
+      delegate.get(),
+      base::Bind(&UserListTest::SetDelegateCallback, base::Unretained(this)));
+
+  EXPECT_EQ(gcm::kInvalidSerialNumber, last_assigned_serial_number_);
+  EXPECT_EQ("", last_assigned_username_);
+
+  // Now run the initialization.
+  gcm_store_->Load(base::Bind(
+      &UserListTest::Initialize, base::Unretained(this), user_list.get()));
+  // Need to pump twice, due to initialization triggering additional set of
+  // callbacks to be run.
+  PumpLoop();
+  PumpLoop();
+
+  EXPECT_EQ(last_assigned_serial_number_,
+            user_list->GetSerialNumberForUsername(delegate->GetUsername()));
+  EXPECT_EQ(delegate->GetUsername(), last_assigned_username_);
+}
+
+// Adding a delegate that already has a serial number on a subsequent restart of
+// the user list and prior to initialization. Expects to assing correct serial
+// number based on existing mappings.
+TEST_F(UserListTest, AddDelegateThenInitializeWithSerialNumber) {
+  scoped_ptr<UserList> user_list(BuildUserList());
+  gcm_store_->Load(base::Bind(
+      &UserListTest::Initialize, base::Unretained(this), user_list.get()));
+  PumpLoop();
+
+  // First add a delegate to the list so that serial number is persisted.
+  scoped_ptr<GCMClientDelegate> delegate(new GCMClientDelegate("test_user_1"));
+  user_list->SetDelegate(
+      delegate->GetUsername(),
+      delegate.get(),
+      base::Bind(&UserListTest::SetDelegateCallback, base::Unretained(this)));
+  PumpLoop();
+
+  last_assigned_serial_number_ = gcm::kInvalidSerialNumber;
+  last_assigned_username_ = "";
+
+  // Resetting the user list to make sure it is not initialized.
+  user_list = BuildUserList().Pass();
+
+  // Add a delegate again, this time no callback is expected until the list is
+  // initialized.
+  user_list->SetDelegate(
+      delegate->GetUsername(),
+      delegate.get(),
+      base::Bind(&UserListTest::SetDelegateCallback, base::Unretained(this)));
+
+  // Now run the initialization.
+  gcm_store_->Load(base::Bind(
+      &UserListTest::Initialize, base::Unretained(this), user_list.get()));
+  // Need to pump twice, due to initialization triggering additional set of
+  // callbacks to be run.
+  PumpLoop();
+  PumpLoop();
+
+  EXPECT_EQ(last_assigned_serial_number_,
+            user_list->GetSerialNumberForUsername(delegate->GetUsername()));
+  EXPECT_EQ(delegate->GetUsername(), last_assigned_username_);
+}
+
+}  // namespace gcm