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
12namespace {
13
14class 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.
34TEST(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}
83