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// Copyright 2024 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/base/network_cost_change_notifier_win.h"
#include "base/run_loop.h"
#include "base/sequence_checker.h"
#include "base/test/scoped_os_info_override_win.h"
#include "base/win/windows_version.h"
#include "net/base/network_change_notifier.h"
#include "net/test/test_connection_cost_observer.h"
#include "net/test/test_with_task_environment.h"
#include "net/test/win/fake_network_cost_manager.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace net {
class NetworkCostChangeNotifierWinTest : public TestWithTaskEnvironment {
public:
void SetUp() override {
if (base::win::GetVersion() <
NetworkCostChangeNotifierWin::kSupportedOsVersion) {
GTEST_SKIP();
}
}
protected:
FakeNetworkCostManagerEnvironment fake_network_cost_manager_environment_;
};
TEST_F(NetworkCostChangeNotifierWinTest, InitialCostUnknown) {
fake_network_cost_manager_environment_.SetCost(
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNKNOWN);
TestConnectionCostObserver cost_change_observer;
auto cost_change_callback =
base::BindRepeating(&TestConnectionCostObserver::OnConnectionCostChanged,
base::Unretained(&cost_change_observer));
base::SequenceBound<NetworkCostChangeNotifierWin> cost_change_notifier =
NetworkCostChangeNotifierWin::CreateInstance(cost_change_callback);
// Wait for `NetworkCostChangeNotifierWin` to finish initializing.
cost_change_observer.WaitForConnectionCostChanged();
// `NetworkCostChangeNotifierWin` must report an unknown cost after
// initializing.
EXPECT_EQ(cost_change_observer.cost_changed_calls(), 1u);
EXPECT_EQ(cost_change_observer.last_cost_changed_input(),
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNKNOWN);
}
TEST_F(NetworkCostChangeNotifierWinTest, InitialCostKnown) {
fake_network_cost_manager_environment_.SetCost(
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNMETERED);
TestConnectionCostObserver cost_change_observer;
auto cost_change_callback =
base::BindRepeating(&TestConnectionCostObserver::OnConnectionCostChanged,
base::Unretained(&cost_change_observer));
base::SequenceBound<NetworkCostChangeNotifierWin> cost_change_notifier =
NetworkCostChangeNotifierWin::CreateInstance(cost_change_callback);
// Initializing changes the cost from unknown to unmetered.
cost_change_observer.WaitForConnectionCostChanged();
ASSERT_EQ(cost_change_observer.cost_changed_calls(), 1u);
EXPECT_EQ(cost_change_observer.last_cost_changed_input(),
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNMETERED);
}
TEST_F(NetworkCostChangeNotifierWinTest, MultipleCostChangedEvents) {
fake_network_cost_manager_environment_.SetCost(
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNMETERED);
TestConnectionCostObserver cost_change_observer;
auto cost_change_callback =
base::BindRepeating(&TestConnectionCostObserver::OnConnectionCostChanged,
base::Unretained(&cost_change_observer));
base::SequenceBound<NetworkCostChangeNotifierWin> cost_change_notifier =
NetworkCostChangeNotifierWin::CreateInstance(cost_change_callback);
// Initializing changes the cost from unknown to unmetered.
cost_change_observer.WaitForConnectionCostChanged();
ASSERT_EQ(cost_change_observer.cost_changed_calls(), 1u);
EXPECT_EQ(cost_change_observer.last_cost_changed_input(),
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNMETERED);
fake_network_cost_manager_environment_.SetCost(
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_METERED);
// The simulated event changes the cost from unmetered to metered.
cost_change_observer.WaitForConnectionCostChanged();
ASSERT_EQ(cost_change_observer.cost_changed_calls(), 2u);
EXPECT_EQ(cost_change_observer.last_cost_changed_input(),
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_METERED);
fake_network_cost_manager_environment_.SetCost(
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNKNOWN);
// The simulated event changes the cost from metered to unknown.
cost_change_observer.WaitForConnectionCostChanged();
ASSERT_EQ(cost_change_observer.cost_changed_calls(), 3u);
EXPECT_EQ(cost_change_observer.last_cost_changed_input(),
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNKNOWN);
}
TEST_F(NetworkCostChangeNotifierWinTest, DuplicateEvents) {
fake_network_cost_manager_environment_.SetCost(
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNMETERED);
TestConnectionCostObserver cost_change_observer;
auto cost_change_callback =
base::BindRepeating(&TestConnectionCostObserver::OnConnectionCostChanged,
base::Unretained(&cost_change_observer));
base::SequenceBound<NetworkCostChangeNotifierWin> cost_change_notifier =
NetworkCostChangeNotifierWin::CreateInstance(cost_change_callback);
// Initializing changes the cost from unknown to unmetered.
cost_change_observer.WaitForConnectionCostChanged();
ASSERT_EQ(cost_change_observer.cost_changed_calls(), 1u);
fake_network_cost_manager_environment_.SetCost(
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNMETERED);
cost_change_observer.WaitForConnectionCostChanged();
// Changing from unmetered to unmetered must dispatch a cost changed event.
ASSERT_EQ(cost_change_observer.cost_changed_calls(), 2u);
EXPECT_EQ(cost_change_observer.last_cost_changed_input(),
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNMETERED);
}
TEST_F(NetworkCostChangeNotifierWinTest, ShutdownImmediately) {
TestConnectionCostObserver cost_change_observer;
auto cost_change_callback =
base::BindRepeating(&TestConnectionCostObserver::OnConnectionCostChanged,
base::Unretained(&cost_change_observer));
base::SequenceBound<NetworkCostChangeNotifierWin> cost_change_notifier =
NetworkCostChangeNotifierWin::CreateInstance(cost_change_callback);
// Shutting down immediately must not crash.
cost_change_notifier.Reset();
// Wait for `NetworkCostChangeNotifierWin` to finish initializing and shutting
// down.
RunUntilIdle();
// `NetworkCostChangeNotifierWin` reports a connection change after
// initializing.
EXPECT_EQ(cost_change_observer.cost_changed_calls(), 1u);
fake_network_cost_manager_environment_.SetCost(
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_METERED);
// Wait for `NetworkCostChangeNotifierWin` to handle the cost changed event.
RunUntilIdle();
// After shutdown, cost changed events must have no effect.
EXPECT_EQ(cost_change_observer.cost_changed_calls(), 1u);
}
TEST_F(NetworkCostChangeNotifierWinTest, ErrorHandling) {
// Simulate the failure of each OS API while initializing
// `NetworkCostChangeNotifierWin`.
constexpr const NetworkCostManagerStatus kErrorList[] = {
NetworkCostManagerStatus::kErrorCoCreateInstanceFailed,
NetworkCostManagerStatus::kErrorQueryInterfaceFailed,
NetworkCostManagerStatus::kErrorFindConnectionPointFailed,
NetworkCostManagerStatus::kErrorAdviseFailed,
NetworkCostManagerStatus::kErrorGetCostFailed,
};
for (auto error : kErrorList) {
fake_network_cost_manager_environment_.SetCost(
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNMETERED);
fake_network_cost_manager_environment_.SimulateError(error);
TestConnectionCostObserver cost_change_observer;
auto cost_change_callback = base::BindRepeating(
&TestConnectionCostObserver::OnConnectionCostChanged,
base::Unretained(&cost_change_observer));
base::SequenceBound<NetworkCostChangeNotifierWin> cost_change_notifier =
NetworkCostChangeNotifierWin::CreateInstance(cost_change_callback);
if (error == NetworkCostManagerStatus::kErrorGetCostFailed) {
// `NetworkCostChangeNotifierWin` must report an unknown cost after
// `INetworkCostManager::GetCost()` fails.
cost_change_observer.WaitForConnectionCostChanged();
EXPECT_EQ(cost_change_observer.cost_changed_calls(), 1u);
EXPECT_EQ(cost_change_observer.last_cost_changed_input(),
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNKNOWN);
} else {
// Wait for `NetworkCostChangeNotifierWin` to finish initializing.
RunUntilIdle();
// `NetworkCostChangeNotifierWin` must NOT report a changed cost after
// failing to initialize.
EXPECT_EQ(cost_change_observer.cost_changed_calls(), 0u);
}
}
}
TEST_F(NetworkCostChangeNotifierWinTest, UnsupportedOS) {
base::test::ScopedOSInfoOverride os_override(
base::test::ScopedOSInfoOverride::Type::kWinServer2016);
fake_network_cost_manager_environment_.SetCost(
NetworkChangeNotifier::ConnectionCost::CONNECTION_COST_UNMETERED);
TestConnectionCostObserver cost_change_observer;
auto cost_change_callback =
base::BindRepeating(&TestConnectionCostObserver::OnConnectionCostChanged,
base::Unretained(&cost_change_observer));
base::SequenceBound<NetworkCostChangeNotifierWin> cost_change_notifier =
NetworkCostChangeNotifierWin::CreateInstance(cost_change_callback);
// Wait for `NetworkCostChangeNotifierWin` to finish initializing.
RunUntilIdle();
// `NetworkCostChangeNotifierWin` must NOT report a changed cost for
// unsupported OSes.
EXPECT_EQ(cost_change_observer.cost_changed_calls(), 0u);
}
} // namespace net
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