[CrOS multi-profiles] Restore user sessions after crash

chrome/browser/chromeos/login/crash_restore_browsertest.cc

Index: chrome/browser/chromeos/login/crash_restore_browsertest.cc
diff --git a/chrome/browser/chromeos/login/crash_restore_browsertest.cc b/chrome/browser/chromeos/login/crash_restore_browsertest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..55a3fd2e3215458235f6ae8f57c51e566b289bbc
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+++ b/chrome/browser/chromeos/login/crash_restore_browsertest.cc
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+// Copyright (c) 2013 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 <string>
+#include <vector>
+
+#include "base/command_line.h"
+#include "base/memory/ref_counted.h"
+#include "base/run_loop.h"
+#include "chrome/browser/chromeos/cros/cros_in_process_browser_test.h"
+#include "chrome/browser/chromeos/login/user.h"
+#include "chrome/browser/chromeos/login/user_manager.h"
+#include "chrome/common/chrome_switches.h"
+#include "chromeos/chromeos_switches.h"
+#include "chromeos/dbus/cryptohome_client.h"
+#include "chromeos/dbus/fake_session_manager_client.h"
+#include "chromeos/dbus/mock_dbus_thread_manager_without_gmock.h"
+#include "chromeos/dbus/session_manager_client.h"
+#include "content/public/test/test_utils.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "third_party/cros_system_api/dbus/service_constants.h"
+
+namespace chromeos {
+
+namespace {
+
+const char kUserId1[] = "user1@example.com";
+const char kUserId2[] = "user2@example.com";
+const char kUserId3[] = "user3@example.com";
+
+}  // namespace
+
+class CrashRestoreSimpleTest : public CrosInProcessBrowserTest {
+ protected:
+  CrashRestoreSimpleTest() {}
+
+  virtual ~CrashRestoreSimpleTest() {}
+
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    command_line->AppendSwitch(::switches::kMultiProfiles);
+    command_line->AppendSwitchASCII(switches::kLoginUser, kUserId1);
+    command_line->AppendSwitchASCII(
+        switches::kLoginProfile,
+        CryptohomeClient::GetStubSanitizedUsername(kUserId1));
+  }
+
+  virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
+    // Redirect session_manager DBus calls to FakeSessionManagerClient.
+    MockDBusThreadManagerWithoutGMock* dbus_thread_manager =
+        new MockDBusThreadManagerWithoutGMock();
+    session_manager_client_ =
+        dbus_thread_manager->fake_session_manager_client();
+    DBusThreadManager::InitializeForTesting(dbus_thread_manager);
+    session_manager_client_->StartSession(kUserId1);
+  }
+
+  FakeSessionManagerClient* session_manager_client_;
+};
+
+IN_PROC_BROWSER_TEST_F(CrashRestoreSimpleTest, RestoreSessionForOneUser) {
+  UserManager* user_manager = UserManager::Get();
+  User* user = user_manager->GetActiveUser();
+  ASSERT_TRUE(user);
+  EXPECT_EQ(kUserId1, user->email());
+  EXPECT_EQ(CryptohomeClient::GetStubSanitizedUsername(kUserId1),
+            user->username_hash());
+  EXPECT_EQ(1UL, user_manager->GetLoggedInUsers().size());
+}
+
+// Observer that keeps track of user sessions restore event.
+class UserSessionRestoreObserver :
+    public UserManager::UserSessionStateObserver {
+ public:
+  UserSessionRestoreObserver()
+      : running_loop_(false),
+        user_sessions_restored_(UserManager::Get()->UserSessionsRestored()) {
+    if (!user_sessions_restored_)
+      UserManager::Get()->AddSessionStateObserver(this);
+  }
+  virtual ~UserSessionRestoreObserver() {}
+
+  virtual void ActiveUserHashChanged(const std::string& hash) OVERRIDE {
+  }
+  virtual void PendingUserSessionsRestoreFinished() OVERRIDE {
+    user_sessions_restored_ = true;
+    UserManager::Get()->RemoveSessionStateObserver(this);
+    if (!running_loop_)
+      return;
+
+    message_loop_runner_->Quit();
+    running_loop_ = false;
+  }
+
+  // Wait until the user sessions are restored. If that happened between the
+  // construction of this object and this call or even before it was created
+  // then it returns immediately.
+  void Wait() {
+    if (user_sessions_restored_)
+      return;
+
+    running_loop_ = true;
+    message_loop_runner_ = new content::MessageLoopRunner();
+    message_loop_runner_->Run();
+  }
+
+ private:
+  bool running_loop_;
+  bool user_sessions_restored_;
+  scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(UserSessionRestoreObserver);
+};
+
+class CrashRestoreComplexTest : public CrashRestoreSimpleTest {
+ protected:
+  CrashRestoreComplexTest() {}
+  virtual ~CrashRestoreComplexTest() {}
+
+  virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
+    CrashRestoreSimpleTest::SetUpInProcessBrowserTestFixture();
+    session_manager_client_->StartSession(kUserId2);
+    session_manager_client_->StartSession(kUserId3);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(CrashRestoreComplexTest, RestoreSessionForThreeUsers) {
+  {
+    UserSessionRestoreObserver restore_observer;
+    restore_observer.Wait();
+  }
+
+  UserManager* user_manager = UserManager::Get();
+  DCHECK(user_manager->UserSessionsRestored());
+
+  // User that is last in the user sessions map becomes active. This behavior
+  // will become better defined once each user gets a separate user desktop.
+  User* user = user_manager->GetActiveUser();
+  ASSERT_TRUE(user);
+  EXPECT_EQ(kUserId3, user->email());
+  EXPECT_EQ(CryptohomeClient::GetStubSanitizedUsername(kUserId3),
+            user->username_hash());
+  const UserList& users = user_manager->GetLoggedInUsers();
+  ASSERT_EQ(3UL, users.size());
+
+  // User that becomes active moves to the beginning of the list.
+  EXPECT_EQ(kUserId3, users[0]->email());
+  EXPECT_EQ(CryptohomeClient::GetStubSanitizedUsername(kUserId3),
+            users[0]->username_hash());
+  EXPECT_EQ(kUserId2, users[1]->email());
+  EXPECT_EQ(CryptohomeClient::GetStubSanitizedUsername(kUserId2),
+            users[1]->username_hash());
+  EXPECT_EQ(kUserId1, users[2]->email());
+  EXPECT_EQ(CryptohomeClient::GetStubSanitizedUsername(kUserId1),
+            users[2]->username_hash());
+}
+
+}  // namespace chromeos