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 "content/public/test/test_browser_thread_bundle.h"
  11 #include "testing/gtest/include/gtest/gtest.h"
  12
  13 namespace {
  14
  15 class TestingFontFamilyCache : public FontFamilyCache {
  16  public:
  17   explicit TestingFontFamilyCache(Profile* profile)
  18       : FontFamilyCache(profile), fetch_font_count_(0) {}
  19   ~TestingFontFamilyCache() override {}
  20   base::string16 FetchFont(const char* script, 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   content::TestBrowserThreadBundle thread_bundle_;
  36   TestingProfile profile;
  37   TestingFontFamilyCache cache(&profile);
  38   TestingPrefServiceSyncable* prefs = profile.GetTestingPrefService();
  39
  40   std::string font1("font 1");
  41   std::string font2("font 2");
  42   std::string map_name("webkit.webprefs.fonts.pictograph");
  43   std::string script("Zzyxca");
  44   std::string pref_name(map_name + '.' + script);
  45   std::string pref_name2(map_name + '.' + "adsf");
  46
  47   // Registers 2 preferences, and sets the first one.
  48   prefs->registry()->RegisterStringPref(pref_name.c_str(), std::string());
  49   prefs->registry()->RegisterStringPref(pref_name2.c_str(), std::string());
  50   prefs->SetString(pref_name.c_str(), font1.c_str());
  51
  52   // Check that the right preference is returned.
  53   std::string result = base::UTF16ToUTF8(
  54       cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
  55   EXPECT_EQ(font1, result);
  56   EXPECT_EQ(1, cache.fetch_font_count_);
  57
  58   // Check that the second access uses the cache.
  59   result = base::UTF16ToUTF8(
  60       cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
  61   EXPECT_EQ(font1, result);
  62   EXPECT_EQ(1, cache.fetch_font_count_);
  63
  64   // Changing another preference should have no effect.
  65   prefs->SetString(pref_name2.c_str(), "katy perry");
  66   result = base::UTF16ToUTF8(
  67       cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
  68   EXPECT_EQ(font1, result);
  69   EXPECT_EQ(1, cache.fetch_font_count_);
  70
  71   // Changing the preferences invalidates the cache.
  72   prefs->SetString(pref_name.c_str(), font2.c_str());
  73   result = base::UTF16ToUTF8(
  74       cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
  75   EXPECT_EQ(font2, result);
  76   EXPECT_EQ(2, cache.fetch_font_count_);
  77 }