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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 "net/log/net_log_util.h"
#include <algorithm>
#include <set>
#include <string_view>
#include <vector>
#include "base/containers/contains.h"
#include "base/feature_list.h"
#include "base/files/file_path.h"
#include "base/memory/raw_ptr.h"
#include "base/metrics/field_trial.h"
#include "base/test/scoped_feature_list.h"
#include "base/test/task_environment.h"
#include "base/values.h"
#include "net/base/net_errors.h"
#include "net/base/net_info_source_list.h"
#include "net/base/test_completion_callback.h"
#include "net/dns/public/doh_provider_entry.h"
#include "net/http/http_cache.h"
#include "net/http/http_transaction.h"
#include "net/http/mock_http_cache.h"
#include "net/log/net_log_source.h"
#include "net/log/net_log_with_source.h"
#include "net/log/test_net_log.h"
#include "net/traffic_annotation/network_traffic_annotation_test_helper.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_builder.h"
#include "net/url_request/url_request_test_util.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
namespace {
// Make sure GetNetConstants doesn't crash.
TEST(NetLogUtil, GetNetConstants) {
base::Value constants(GetNetConstants());
}
TEST(NetLogUtil, GetNetConstantsOkInNetError) {
base::Value constants(GetNetConstants());
std::optional<int> ok_value =
constants.GetDict().FindDict("netError")->FindInt("net::OK");
EXPECT_THAT(ok_value, testing::Optional(0));
}
// Make sure GetNetInfo doesn't crash when called on contexts with and without
// caches, and they have the same number of elements.
TEST(NetLogUtil, GetNetInfo) {
base::test::TaskEnvironment task_environment;
auto context = CreateTestURLRequestContextBuilder()->Build();
HttpCache* http_cache = context->http_transaction_factory()->GetCache();
// Get NetInfo when there's no cache backend (It's only created on first use).
EXPECT_FALSE(http_cache->GetCurrentBackend());
base::Value::Dict net_info_without_cache(GetNetInfo(context.get()));
EXPECT_FALSE(http_cache->GetCurrentBackend());
EXPECT_GT(net_info_without_cache.size(), 0u);
// Force creation of a cache backend, and get NetInfo again.
auto [rv, _] = context->http_transaction_factory()->GetCache()->GetBackend(
TestGetBackendCompletionCallback().callback());
EXPECT_EQ(OK, rv);
EXPECT_TRUE(http_cache->GetCurrentBackend());
base::Value::Dict net_info_with_cache = GetNetInfo(context.get());
EXPECT_GT(net_info_with_cache.size(), 0u);
EXPECT_EQ(net_info_without_cache.size(), net_info_with_cache.size());
}
// Verify that active Field Trials are reflected.
TEST(NetLogUtil, GetNetInfoIncludesFieldTrials) {
base::test::TaskEnvironment task_environment;
// Clear all Field Trials.
base::test::ScopedFeatureList scoped_feature_list;
scoped_feature_list.InitWithFeatureList(
std::make_unique<base::FeatureList>());
// Add and activate a new Field Trial.
base::FieldTrialList::CreateFieldTrial("NewFieldTrial", "Active");
EXPECT_EQ(base::FieldTrialList::FindFullName("NewFieldTrial"), "Active");
auto context = CreateTestURLRequestContextBuilder()->Build();
base::Value net_info(GetNetInfo(context.get()));
// Verify that the returned information reflects the new trial.
ASSERT_TRUE(net_info.is_dict());
base::Value::List* trials =
net_info.GetDict().FindList("activeFieldTrialGroups");
ASSERT_NE(nullptr, trials);
EXPECT_EQ(1u, trials->size());
EXPECT_TRUE((*trials)[0].is_string());
EXPECT_EQ("NewFieldTrial:Active", (*trials)[0].GetString());
}
// Demonstrate that disabling a provider causes it to be added to the list of
// disabled DoH providers.
//
// TODO(crbug.com/40218379) Stop using the real DoH provider list.
TEST(NetLogUtil, GetNetInfoIncludesDisabledDohProviders) {
constexpr std::string_view kArbitraryProvider = "Google";
base::test::TaskEnvironment task_environment;
for (bool provider_enabled : {false, true}) {
// Get the DoH provider entry.
auto provider_list = net::DohProviderEntry::GetList();
auto provider_it = std::ranges::find(provider_list, kArbitraryProvider,
&net::DohProviderEntry::provider);
CHECK(provider_it != provider_list.end());
const DohProviderEntry& provider_entry = **provider_it;
// Enable or disable the provider's feature according to `provider_enabled`.
base::test::ScopedFeatureList scoped_feature_list;
scoped_feature_list.InitWithFeatureState(provider_entry.feature.get(),
provider_enabled);
EXPECT_EQ(provider_enabled,
base::FeatureList::IsEnabled(provider_entry.feature.get()));
// Verify that the provider is present in the list of disabled providers iff
// we disabled it.
auto context = CreateTestURLRequestContextBuilder()->Build();
base::Value net_info(GetNetInfo(context.get()));
ASSERT_TRUE(net_info.is_dict());
const base::Value::List* disabled_doh_providers_list =
net_info.GetDict().FindList(kNetInfoDohProvidersDisabledDueToFeature);
CHECK(disabled_doh_providers_list);
EXPECT_EQ(!provider_enabled,
base::Contains(*disabled_doh_providers_list,
base::Value(kArbitraryProvider)));
}
}
// Make sure CreateNetLogEntriesForActiveObjects works for requests from a
// single URLRequestContext.
TEST(NetLogUtil, CreateNetLogEntriesForActiveObjectsOneContext) {
base::test::TaskEnvironment task_environment;
// Using same context for each iteration makes sure deleted requests don't
// appear in the list, or result in crashes.
auto context = CreateTestURLRequestContextBuilder()->Build();
TestDelegate delegate;
for (size_t num_requests = 0; num_requests < 5; ++num_requests) {
std::vector<std::unique_ptr<URLRequest>> requests;
for (size_t i = 0; i < num_requests; ++i) {
requests.push_back(context->CreateRequest(GURL("about:life"),
DEFAULT_PRIORITY, &delegate,
TRAFFIC_ANNOTATION_FOR_TESTS));
}
std::set<URLRequestContext*> contexts;
contexts.insert(context.get());
RecordingNetLogObserver net_log_observer;
CreateNetLogEntriesForActiveObjects(contexts, &net_log_observer);
auto entry_list = net_log_observer.GetEntries();
ASSERT_EQ(num_requests, entry_list.size());
for (size_t i = 0; i < num_requests; ++i) {
EXPECT_EQ(entry_list[i].source.id, requests[i]->net_log().source().id);
}
}
}
// Make sure CreateNetLogEntriesForActiveObjects works with multiple
// URLRequestContexts.
TEST(NetLogUtil, CreateNetLogEntriesForActiveObjectsMultipleContexts) {
base::test::TaskEnvironment task_environment;
TestDelegate delegate;
for (size_t num_requests = 0; num_requests < 5; ++num_requests) {
std::vector<std::unique_ptr<URLRequestContext>> contexts;
std::vector<std::unique_ptr<URLRequest>> requests;
std::set<URLRequestContext*> context_set;
for (size_t i = 0; i < num_requests; ++i) {
contexts.push_back(CreateTestURLRequestContextBuilder()->Build());
context_set.insert(contexts[i].get());
requests.push_back(
contexts[i]->CreateRequest(GURL("about:hats"), DEFAULT_PRIORITY,
&delegate, TRAFFIC_ANNOTATION_FOR_TESTS));
}
RecordingNetLogObserver net_log_observer;
CreateNetLogEntriesForActiveObjects(context_set, &net_log_observer);
auto entry_list = net_log_observer.GetEntries();
ASSERT_EQ(num_requests, entry_list.size());
for (size_t i = 0; i < num_requests; ++i) {
EXPECT_EQ(entry_list[i].source.id, requests[i]->net_log().source().id);
}
}
}
} // namespace
} // namespace net
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