chrome/browser/font_family_cache_unittest.cc

   1 // Copyright 2014 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/font_family_cache.h"
   6
   7 #include "base/strings/utf_string_conversions.h"
   8 #include "chrome/test/base/testing_pref_service_syncable.h"
   9 #include "chrome/test/base/testing_profile.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 namespace {
  13
  14 class TestingFontFamilyCache : public FontFamilyCache {
  15  public:
  16   explicit TestingFontFamilyCache(Profile* profile)
  17       : FontFamilyCache(profile), fetch_font_count_(0) {}
  18   virtual ~TestingFontFamilyCache() {}
  19   virtual base::string16 FetchFont(const char* script,
  20                                    const char* map_name) OVERRIDE {
  21     ++fetch_font_count_;
  22     return FontFamilyCache::FetchFont(script, map_name);
  23   }
  24
  25   int fetch_font_count_;
  26
  27  private:
  28   DISALLOW_COPY_AND_ASSIGN(TestingFontFamilyCache);
  29 };
  30
  31 }  // namespace
  32
  33 // Tests that the cache is correctly set and cleared.
  34 TEST(FontFamilyCacheTest, Caching) {
  35   TestingProfile profile;
  36   TestingFontFamilyCache cache(&profile);
  37   TestingPrefServiceSyncable* prefs = profile.GetTestingPrefService();
  38
  39   std::string font1("font 1");
  40   std::string font2("font 2");
  41   std::string map_name("webkit.webprefs.fonts.pictograph");
  42   std::string script("Zzyxca");
  43   std::string pref_name(map_name + '.' + script);
  44   std::string pref_name2(map_name + '.' + "adsf");
  45
  46   // Registers 2 preferences, and sets the first one.
  47   prefs->registry()->RegisterStringPref(
  48       pref_name.c_str(),
  49       std::string(),
  50       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
  51   prefs->registry()->RegisterStringPref(
  52       pref_name2.c_str(),
  53       std::string(),
  54       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
  55   prefs->SetString(pref_name.c_str(), font1.c_str());
  56
  57   // Check that the right preference is returned.
  58   std::string result = base::UTF16ToUTF8(
  59       cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
  60   EXPECT_EQ(font1, result);
  61   EXPECT_EQ(1, cache.fetch_font_count_);
  62
  63   // Check that the second access uses the cache.
  64   result = base::UTF16ToUTF8(
  65       cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
  66   EXPECT_EQ(font1, result);
  67   EXPECT_EQ(1, cache.fetch_font_count_);
  68
  69   // Changing another preference should have no effect.
  70   prefs->SetString(pref_name2.c_str(), "katy perry");
  71   result = base::UTF16ToUTF8(
  72       cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
  73   EXPECT_EQ(font1, result);
  74   EXPECT_EQ(1, cache.fetch_font_count_);
  75
  76   // Changing the preferences invalidates the cache.
  77   prefs->SetString(pref_name.c_str(), font2.c_str());
  78   result = base::UTF16ToUTF8(
  79       cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
  80   EXPECT_EQ(font2, result);
  81   EXPECT_EQ(2, cache.fetch_font_count_);
  82 }