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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/chromeos/preferences.h"
      6 
      7 #include "base/prefs/pref_member.h"
      8 #include "chrome/browser/chromeos/input_method/mock_input_method_manager.h"
      9 #include "chrome/browser/download/download_prefs.h"
     10 #include "chrome/common/pref_names.h"
     11 #include "chrome/test/base/testing_pref_service_syncable.h"
     12 #include "components/user_prefs/pref_registry_syncable.h"
     13 #include "testing/gtest/include/gtest/gtest.h"
     14 
     15 namespace chromeos {
     16 namespace {
     17 
     18 class MyMockInputMethodManager : public input_method::MockInputMethodManager {
     19  public:
     20   MyMockInputMethodManager(StringPrefMember* previous,
     21                            StringPrefMember* current)
     22       : previous_(previous),
     23         current_(current) {
     24   }
     25   virtual ~MyMockInputMethodManager() {
     26   }
     27 
     28   virtual void ChangeInputMethod(const std::string& input_method_id) OVERRIDE {
     29     last_input_method_id_ = input_method_id;
     30     // Do the same thing as BrowserStateMonitor::UpdateUserPreferences.
     31     const std::string current_input_method_on_pref = current_->GetValue();
     32     if (current_input_method_on_pref == input_method_id)
     33       return;
     34     previous_->SetValue(current_input_method_on_pref);
     35     current_->SetValue(input_method_id);
     36   }
     37 
     38   std::string last_input_method_id_;
     39 
     40  private:
     41   StringPrefMember* previous_;
     42   StringPrefMember* current_;
     43 };
     44 
     45 }  // anonymous namespace
     46 
     47 TEST(PreferencesTest, TestUpdatePrefOnBrowserScreenDetails) {
     48   TestingPrefServiceSyncable prefs;
     49   Preferences::RegisterProfilePrefs(prefs.registry());
     50   DownloadPrefs::RegisterProfilePrefs(prefs.registry());
     51   // kSelectFileLastDirectory is registered for Profile. Here we register it for
     52   // testing.
     53   prefs.registry()->RegisterStringPref(
     54       prefs::kSelectFileLastDirectory,
     55       std::string(),
     56       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
     57 
     58   StringPrefMember previous;
     59   previous.Init(prefs::kLanguagePreviousInputMethod, &prefs);
     60   previous.SetValue("KeyboardA");
     61   StringPrefMember current;
     62   current.Init(prefs::kLanguageCurrentInputMethod, &prefs);
     63   current.SetValue("KeyboardB");
     64 
     65   MyMockInputMethodManager mock_manager(&previous, &current);
     66   Preferences testee(&mock_manager);
     67   testee.InitUserPrefsForTesting(&prefs);
     68   testee.SetInputMethodListForTesting();
     69 
     70   // Confirm they're unchanged.
     71   EXPECT_EQ("KeyboardA", previous.GetValue());
     72   EXPECT_EQ("KeyboardB", current.GetValue());
     73   EXPECT_EQ("KeyboardB", mock_manager.last_input_method_id_);
     74 }
     75 
     76 }  // namespace chromeos
     77