base/prefs/mock_pref_change_callback.h

   1 // Copyright (c) 2011 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 #ifndef BASE_PREFS_MOCK_PREF_CHANGE_CALLBACK_H_
   6 #define BASE_PREFS_MOCK_PREF_CHANGE_CALLBACK_H_
   7
   8 #include <string>
   9
  10 #include "base/prefs/pref_change_registrar.h"
  11 #include "base/prefs/pref_service.h"
  12 #include "testing/gmock/include/gmock/gmock.h"
  13
  14 using testing::Pointee;
  15 using testing::Property;
  16 using testing::Truly;
  17
  18 // Matcher that checks whether the current value of the preference named
  19 // |pref_name| in |prefs| matches |value|. If |value| is NULL, the matcher
  20 // checks that the value is not set.
  21 MATCHER_P3(PrefValueMatches, prefs, pref_name, value, "") {
  22   const PrefService::Preference* pref =
  23       prefs->FindPreference(pref_name.c_str());
  24   if (!pref)
  25     return false;
  26
  27   const base::Value* actual_value = pref->GetValue();
  28   if (!actual_value)
  29     return value == NULL;
  30   if (!value)
  31     return actual_value == NULL;
  32   return value->Equals(actual_value);
  33 }
  34
  35 // A mock for testing preference notifications and easy setup of expectations.
  36 class MockPrefChangeCallback {
  37  public:
  38   explicit MockPrefChangeCallback(PrefService* prefs);
  39   virtual ~MockPrefChangeCallback();
  40
  41   PrefChangeRegistrar::NamedChangeCallback GetCallback();
  42
  43   MOCK_METHOD1(OnPreferenceChanged, void(const std::string&));
  44
  45   void Expect(const std::string& pref_name,
  46               const base::Value* value);
  47
  48  private:
  49   PrefService* prefs_;
  50 };
  51
  52 #endif  // BASE_PREFS_MOCK_PREF_CHANGE_CALLBACK_H_