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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <vector>
#include "base/containers/contains.h"
#include "base/run_loop.h"
#include "base/test/scoped_feature_list.h"
#include "build/build_config.h"
#include "content/browser/network/network_service_util_internal.h"
#include "content/public/browser/network_service_instance.h"
#include "content/public/browser/network_service_util.h"
#include "content/public/common/content_features.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/content_browser_test.h"
#include "mojo/public/cpp/bindings/sync_call_restrictions.h"
#include "sandbox/policy/features.h"
#include "services/network/public/cpp/network_quality_tracker.h"
#include "services/network/public/mojom/network_service.mojom.h"
#include "services/network/public/mojom/network_service_test.mojom.h"
#if BUILDFLAG(IS_ANDROID)
#include "net/android/network_change_notifier_delegate_android.h"
#include "net/android/network_library.h"
#endif
namespace content {
namespace {
std::ostream& operator<<(
std::ostream& os,
const std::vector<net::EffectiveConnectionType>& types) {
os << "[";
bool is_first = true;
for (auto& type : types) {
if (is_first)
is_first = false;
else
os << ",";
os << type;
}
return os << "]";
}
class TestNetworkQualityObserver
: public network::NetworkQualityTracker::EffectiveConnectionTypeObserver {
public:
TestNetworkQualityObserver() = default;
// NetworkQualityTracker::EffectiveConnectionTypeObserver implementation:
void OnEffectiveConnectionTypeChanged(
net::EffectiveConnectionType type) override {
received_types_.push_back(type);
if (type != run_loop_wait_type_)
return;
run_loop_->Quit();
}
void WaitForNotification(net::EffectiveConnectionType run_loop_wait_type) {
if (base::Contains(received_types_, run_loop_wait_type)) {
received_types_.clear();
return;
}
run_loop_wait_type_ = run_loop_wait_type;
run_loop_ = std::make_unique<base::RunLoop>();
run_loop_->Run();
if (!run_loop_->AnyQuitCalled()) {
LOG(ERROR) << "Timed out waiting run_loop_wait_type="
<< run_loop_wait_type
<< ", received_types_=" << received_types_;
}
received_types_.clear();
}
private:
std::unique_ptr<base::RunLoop> run_loop_;
net::EffectiveConnectionType run_loop_wait_type_ =
net::EFFECTIVE_CONNECTION_TYPE_UNKNOWN;
std::vector<net::EffectiveConnectionType> received_types_;
};
class SandboxedNQEBrowserTest : public ContentBrowserTest {
public:
SandboxedNQEBrowserTest() {
#if !BUILDFLAG(IS_MAC) && !BUILDFLAG(IS_FUCHSIA)
// Network Service Sandboxing is unconditionally enabled on these
// platforms.
scoped_feature_list_.InitAndEnableFeature(
sandbox::policy::features::kNetworkServiceSandbox);
#endif // !BUILDFLAG(IS_MAC) && !BUILDFLAG(IS_FUCHSIA)
ForceOutOfProcessNetworkService();
}
void SetUpOnMainThread() override {
#if BUILDFLAG(IS_WIN)
if (!sandbox::policy::features::IsNetworkSandboxSupported()) {
// On *some* Windows, sandboxing cannot be enabled. We skip all the tests
// on such platforms.
GTEST_SKIP();
}
#endif
// These assertions need to precede ContentBrowserTest::SetUp to prevent the
// test body from running when one of the assertions fails.
ASSERT_TRUE(IsOutOfProcessNetworkService());
ASSERT_TRUE(sandbox::policy::features::IsNetworkSandboxEnabled());
}
// Simulates a network quality change.
void SimulateNetworkQualityChange(net::EffectiveConnectionType type) {
DCHECK(content::GetNetworkService());
mojo::Remote<network::mojom::NetworkServiceTest> network_service_test;
content::GetNetworkService()->BindTestInterfaceForTesting(
network_service_test.BindNewPipeAndPassReceiver());
base::RunLoop run_loop;
network_service_test->SimulateNetworkQualityChange(type,
run_loop.QuitClosure());
run_loop.Run();
}
void ForceNetworkQualityEstimatorReportWifiAsSlow2G() {
mojo::ScopedAllowSyncCallForTesting allow_sync_call;
DCHECK(content::GetNetworkService());
mojo::Remote<network::mojom::NetworkServiceTest> network_service_test;
content::GetNetworkService()->BindTestInterfaceForTesting(
network_service_test.BindNewPipeAndPassReceiver());
base::RunLoop run_loop;
network_service_test->ForceNetworkQualityEstimatorReportWifiAsSlow2G(
run_loop.QuitClosure());
run_loop.Run();
}
private:
base::test::ScopedFeatureList scoped_feature_list_;
};
// NetworkQualityEstimater used to call android syscall to gather device info
// in the constructor, which has been removed. This test confirms that.
IN_PROC_BROWSER_TEST_F(SandboxedNQEBrowserTest, GetNetworkService) {
EXPECT_TRUE(GetNetworkService());
}
#if BUILDFLAG(IS_WIN)
#define MAYBE_NetworkQualityTracker DISABLED_NetworkQualityTracker
#else
#define MAYBE_NetworkQualityTracker NetworkQualityTracker
#endif
// Simulate EffectiveConnectionType change in NetworkQualityEstimator and
// reports it to mojo client.
IN_PROC_BROWSER_TEST_F(SandboxedNQEBrowserTest, MAYBE_NetworkQualityTracker) {
// Change the network quality to UNKNOWN to prevent any spurious
// notifications.
SimulateNetworkQualityChange(net::EFFECTIVE_CONNECTION_TYPE_UNKNOWN);
std::unique_ptr<network::NetworkQualityTracker> tracker =
std::make_unique<network::NetworkQualityTracker>(
base::BindRepeating(&GetNetworkService));
TestNetworkQualityObserver network_quality_observer;
tracker->AddEffectiveConnectionTypeObserver(&network_quality_observer);
SimulateNetworkQualityChange(net::EFFECTIVE_CONNECTION_TYPE_4G);
network_quality_observer.WaitForNotification(
net::EFFECTIVE_CONNECTION_TYPE_4G);
SimulateNetworkQualityChange(net::EFFECTIVE_CONNECTION_TYPE_3G);
network_quality_observer.WaitForNotification(
net::EFFECTIVE_CONNECTION_TYPE_3G);
// Typical RTT and downlink values when effective connection type is 3G. Taken
// from net::NetworkQualityEstimatorParams.
EXPECT_EQ(base::Milliseconds(450), tracker->GetHttpRTT());
EXPECT_EQ(base::Milliseconds(400), tracker->GetTransportRTT());
EXPECT_EQ(400, tracker->GetDownstreamThroughputKbps());
}
#if BUILDFLAG(IS_ANDROID)
// Turn on/off Wifi on Android and listen it in the network service.
IN_PROC_BROWSER_TEST_F(SandboxedNQEBrowserTest, TurnWifiEnabled) {
const std::string wifi_ssid = net::android::GetWifiSSID();
if (wifi_ssid.empty()) {
GTEST_SKIP() << "This test requires wifi network.";
}
// Let NetworkQualityEstimator reports NetworkChangeNotifier::CONNECTION_WIFI
// as EFFECTIVE_CONNECTION_TYPE_SLOW_2G since EffectiveConnectionType and
// the production receivers doesn't notice Wifi.
ForceNetworkQualityEstimatorReportWifiAsSlow2G();
net::NetworkChangeNotifierDelegateAndroid::
EnableNetworkChangeNotifierAutoDetectForTest();
std::unique_ptr<network::NetworkQualityTracker> tracker =
std::make_unique<network::NetworkQualityTracker>(
base::BindRepeating(&GetNetworkService));
TestNetworkQualityObserver network_quality_observer;
tracker->AddEffectiveConnectionTypeObserver(&network_quality_observer);
net::android::SetWifiEnabledForTesting(true);
network_quality_observer.WaitForNotification(
net::EFFECTIVE_CONNECTION_TYPE_SLOW_2G);
net::android::SetWifiEnabledForTesting(false);
network_quality_observer.WaitForNotification(
net::EFFECTIVE_CONNECTION_TYPE_4G);
net::android::SetWifiEnabledForTesting(true);
network_quality_observer.WaitForNotification(
net::EFFECTIVE_CONNECTION_TYPE_SLOW_2G);
}
#endif
} // namespace
} // namespace content
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