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// Copyright 2017 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_pref_change_notifier.h"
#include "base/functional/bind.h"
#include "chrome/common/pref_names_util.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/testing_pref_service.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
void AppendString(std::vector<std::string>* vect, const std::string& str) {
vect->push_back(str);
}
} // namespace
TEST(FontPrefChangeNotifier, Registrars) {
std::string prefix((pref_names_util::kWebKitFontPrefPrefix));
// Registrar 0 will outlive the notifier.
std::vector<std::string> fonts0;
FontPrefChangeNotifier::Registrar reg0;
std::unique_ptr<TestingPrefServiceSimple> service =
std::make_unique<TestingPrefServiceSimple>();
PrefRegistrySimple* pref_registry = service->registry();
std::string font1 = prefix + "font1";
pref_registry->RegisterStringPref(font1, std::string());
std::string font2 = prefix + "font2";
pref_registry->RegisterStringPref(font2, std::string());
std::string font3 = prefix + "font3";
pref_registry->RegisterStringPref(font3, std::string());
std::unique_ptr<FontPrefChangeNotifier> notifier =
std::make_unique<FontPrefChangeNotifier>(service.get());
reg0.Register(notifier.get(),
base::BindRepeating(&AppendString, base::Unretained(&fonts0)));
// Registrar 1 will be manually unregistered.
std::vector<std::string> fonts1;
FontPrefChangeNotifier::Registrar reg1;
reg1.Register(notifier.get(),
base::BindRepeating(&AppendString, base::Unretained(&fonts1)));
// Registrar 2 will automatically unregister itself when it goes out of scope.
std::vector<std::string> fonts2;
{
FontPrefChangeNotifier::Registrar reg2;
reg2.Register(
notifier.get(),
base::BindRepeating(&AppendString, base::Unretained(&fonts2)));
// All lists should get the font.
service->SetString(font1, "1");
EXPECT_EQ(1u, fonts0.size());
EXPECT_EQ(font1, fonts0.back());
EXPECT_EQ(1u, fonts1.size());
EXPECT_EQ(font1, fonts1.back());
EXPECT_EQ(1u, fonts2.size());
EXPECT_EQ(font1, fonts2.back());
}
// Now that Regsitrar 2 is gone, only 0 and 1 should get changes.
service->SetString(font2, "2");
EXPECT_EQ(2u, fonts0.size());
EXPECT_EQ(font2, fonts0.back());
EXPECT_EQ(2u, fonts1.size());
EXPECT_EQ(font2, fonts1.back());
EXPECT_EQ(1u, fonts2.size());
// Manually unregister Registrar 1.
reg1.Unregister();
EXPECT_FALSE(reg1.is_registered());
// Only Registrar 0 should see changes now.
service->SetString(font3, "3");
EXPECT_EQ(3u, fonts0.size());
EXPECT_EQ(font3, fonts0.back());
EXPECT_EQ(2u, fonts1.size());
EXPECT_EQ(1u, fonts2.size());
EXPECT_EQ(font3, fonts0.back());
notifier.reset();
// Registrar 0 should have been automatically unregistered.
EXPECT_FALSE(reg0.is_registered());
}
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