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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <algorithm>
#include <optional>
#include "base/memory/memory_pressure_listener.h"
#include "base/run_loop.h"
#include "base/test/bind.h"
#include "base/test/scoped_feature_list.h"
#include "chrome/browser/preloading/autocomplete_dictionary_preload_service.h"
#include "chrome/browser/preloading/autocomplete_dictionary_preload_service_factory.h"
#include "chrome/browser/preloading/prefetch/search_prefetch/field_trial_settings.h"
#include "chrome/browser/preloading/prefetch/search_prefetch/search_prefetch_browser_test_base.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "components/omnibox/browser/autocomplete_result.h"
#include "content/public/browser/network_service_instance.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/test/browser_test.h"
#include "services/network/public/mojom/network_service.mojom.h"
namespace {
constexpr char kOmniboxSuggestPrefetchQuery[] = "porgs";
} // namespace
// Test suite to check the AutocompleteDictionaryPreload feature.
class AutocompleteDictionaryPreloadBrowserTest
: public SearchPrefetchBaseBrowserTest {
public:
AutocompleteDictionaryPreloadBrowserTest() {
std::vector<base::test::FeatureRefAndParams> enabled_features = {
{kAutocompleteDictionaryPreload,
{{"autocomplete_preloaded_dictionary_timeout", "10ms"}}}};
feature_list_.InitWithFeaturesAndParameters(enabled_features, {});
}
protected:
bool HasPreloadedSharedDictionaryInfo() {
bool result = false;
base::RunLoop run_loop;
browser()
->profile()
->GetDefaultStoragePartition()
->GetNetworkContext()
->HasPreloadedSharedDictionaryInfoForTesting(
base::BindLambdaForTesting([&](bool value) {
result = value;
run_loop.Quit();
}));
run_loop.Run();
return result;
}
void SendMemoryPressureToNetworkService() {
content::GetNetworkService()->OnMemoryPressure(
base::MemoryPressureListener::MemoryPressureLevel::
MEMORY_PRESSURE_LEVEL_CRITICAL);
// To make sure that OnMemoryPressure has been received by the network
// service, send a GetNetworkList IPC and wait for the result.
base::RunLoop run_loop;
content::GetNetworkService()->GetNetworkList(
net::INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES,
base::BindLambdaForTesting(
[&](const std::optional<net::NetworkInterfaceList>&
interface_list) { run_loop.Quit(); }));
run_loop.Run();
}
private:
base::test::ScopedFeatureList feature_list_;
};
IN_PROC_BROWSER_TEST_F(AutocompleteDictionaryPreloadBrowserTest,
PreloadDictionaryAndDiscard) {
auto* dictionary_preload_service =
AutocompleteDictionaryPreloadServiceFactory::GetForProfile(
browser()->profile());
std::string search_terms = kOmniboxSuggestPrefetchQuery;
AutocompleteMatch autocomplete_match =
CreateSearchSuggestionMatch(search_terms, search_terms, false);
AutocompleteResult autocomplete_result;
autocomplete_result.AppendMatches({autocomplete_match});
dictionary_preload_service->MaybePreload(autocomplete_result);
EXPECT_TRUE(HasPreloadedSharedDictionaryInfo());
WaitForDuration(base::Milliseconds(11));
EXPECT_FALSE(HasPreloadedSharedDictionaryInfo());
}
IN_PROC_BROWSER_TEST_F(AutocompleteDictionaryPreloadBrowserTest,
NonHttpFamilyAreIgnored) {
auto* dictionary_preload_service =
AutocompleteDictionaryPreloadServiceFactory::GetForProfile(
browser()->profile());
std::string search_terms = kOmniboxSuggestPrefetchQuery;
AutocompleteMatch autocomplete_match =
CreateSearchSuggestionMatch(search_terms, search_terms, false);
autocomplete_match.destination_url = GURL("chrome://blank");
AutocompleteResult autocomplete_result;
autocomplete_result.AppendMatches({autocomplete_match});
dictionary_preload_service->MaybePreload(autocomplete_result);
EXPECT_FALSE(HasPreloadedSharedDictionaryInfo());
}
IN_PROC_BROWSER_TEST_F(AutocompleteDictionaryPreloadBrowserTest,
DoNotPreloadDictionayUnderMemoryPressure) {
auto* dictionary_preload_service =
AutocompleteDictionaryPreloadServiceFactory::GetForProfile(
browser()->profile());
std::string search_terms = kOmniboxSuggestPrefetchQuery;
AutocompleteMatch autocomplete_match =
CreateSearchSuggestionMatch(search_terms, search_terms, false);
AutocompleteResult autocomplete_result;
autocomplete_result.AppendMatches({autocomplete_match});
SendMemoryPressureToNetworkService();
dictionary_preload_service->MaybePreload(autocomplete_result);
EXPECT_FALSE(HasPreloadedSharedDictionaryInfo());
}
IN_PROC_BROWSER_TEST_F(AutocompleteDictionaryPreloadBrowserTest,
PreloadedDictionayDiscardedByMemoryPressure) {
auto* dictionary_preload_service =
AutocompleteDictionaryPreloadServiceFactory::GetForProfile(
browser()->profile());
std::string search_terms = kOmniboxSuggestPrefetchQuery;
AutocompleteMatch autocomplete_match =
CreateSearchSuggestionMatch(search_terms, search_terms, false);
AutocompleteResult autocomplete_result;
autocomplete_result.AppendMatches({autocomplete_match});
dictionary_preload_service->MaybePreload(autocomplete_result);
EXPECT_TRUE(HasPreloadedSharedDictionaryInfo());
SendMemoryPressureToNetworkService();
EXPECT_FALSE(HasPreloadedSharedDictionaryInfo());
}
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