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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/font_family_cache.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/test/base/testing_profile.h"
#include "components/sync_preferences/testing_pref_service_syncable.h"
#include "content/public/test/browser_task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
class TestingFontFamilyCache : public FontFamilyCache {
public:
explicit TestingFontFamilyCache(Profile* profile)
: FontFamilyCache(profile), fetch_font_count_(0) {}
TestingFontFamilyCache(const TestingFontFamilyCache&) = delete;
TestingFontFamilyCache& operator=(const TestingFontFamilyCache&) = delete;
~TestingFontFamilyCache() override = default;
std::u16string FetchFont(const char* script, const char* map_name) override {
++fetch_font_count_;
return FontFamilyCache::FetchFont(script, map_name);
}
int fetch_font_count_;
};
} // namespace
// Tests that the cache is correctly set and cleared.
TEST(FontFamilyCacheTest, Caching) {
content::BrowserTaskEnvironment task_environment_;
TestingProfile profile;
TestingFontFamilyCache cache(&profile);
sync_preferences::TestingPrefServiceSyncable* prefs =
profile.GetTestingPrefService();
std::string font1("font 1");
std::string font2("font 2");
std::string map_name("webkit.webprefs.fonts.sansserif");
std::string script("Zzyxca");
std::string pref_name(map_name + '.' + script);
std::string pref_name2(map_name + '.' + "adsf");
// Registers 2 preferences, and sets the first one.
prefs->registry()->RegisterStringPref(pref_name.c_str(), std::string());
prefs->registry()->RegisterStringPref(pref_name2.c_str(), std::string());
prefs->SetString(pref_name.c_str(), font1.c_str());
// Check that the right preference is returned.
std::string result = base::UTF16ToUTF8(
cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
EXPECT_EQ(font1, result);
EXPECT_EQ(1, cache.fetch_font_count_);
// Check that the second access uses the cache.
result = base::UTF16ToUTF8(
cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
EXPECT_EQ(font1, result);
EXPECT_EQ(1, cache.fetch_font_count_);
// Changing another preference should have no effect.
prefs->SetString(pref_name2.c_str(), "katy perry");
result = base::UTF16ToUTF8(
cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
EXPECT_EQ(font1, result);
EXPECT_EQ(1, cache.fetch_font_count_);
// Changing the preferences invalidates the cache.
prefs->SetString(pref_name.c_str(), font2.c_str());
result = base::UTF16ToUTF8(
cache.FetchAndCacheFont(script.c_str(), map_name.c_str()));
EXPECT_EQ(font2, result);
EXPECT_EQ(2, cache.fetch_font_count_);
}
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