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