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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 "chrome/browser/devtools/remote_debugging_server.h"
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/memory/ptr_util.h"
#include "base/run_loop.h"
#include "base/test/scoped_feature_list.h"
#include "chrome/browser/devtools/features.h"
#include "chrome/common/pref_names.h"
#include "chrome/test/base/testing_browser_process.h"
#include "chrome/test/base/testing_profile_manager.h"
#include "components/policy/core/browser/browser_policy_connector.h"
#include "components/policy/core/common/mock_configuration_policy_provider.h"
#include "components/policy/core/common/policy_map.h"
#include "components/policy/policy_constants.h"
#include "components/prefs/pref_change_registrar.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/testing_pref_service.h"
#include "content/public/browser/devtools_agent_host.h"
#include "content/public/browser/devtools_socket_factory.h"
#include "content/public/common/content_constants.h"
#include "content/public/test/browser_task_environment.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using testing::_;
using testing::NiceMock;
using testing::Return;
class MockRemoteDebuggingServer : public RemoteDebuggingServer {
public:
MOCK_METHOD(void,
StartHttpServer,
(std::unique_ptr<content::DevToolsSocketFactory>,
const base::FilePath&,
const base::FilePath&,
content::DevToolsAgentHost::RemoteDebuggingServerMode),
(override));
MOCK_METHOD(void, StopHttpServer, (), (override));
MOCK_METHOD(void, StartPipeHandler, (), (override));
MOCK_METHOD(void, StopPipeHandler, (), (override));
};
class RemoteDebuggingServerTest : public testing::Test {
public:
RemoteDebuggingServerTest()
: profile_manager_(TestingBrowserProcess::GetGlobal()) {
feature_list_.InitAndEnableFeature(
features::kDevToolsAcceptDebuggingConnections);
}
void SetUp() override {
ASSERT_TRUE(profile_manager_.SetUp());
base::CommandLine::ForCurrentProcess()->InitFromArgv({});
}
protected:
content::BrowserTaskEnvironment task_environment_;
TestingProfileManager profile_manager_;
base::test::ScopedFeatureList feature_list_;
};
TEST_F(RemoteDebuggingServerTest, StartsAndStopsWithPref) {
TestingPrefServiceSimple* local_state =
TestingBrowserProcess::GetGlobal()->GetTestingLocalState();
auto server = std::make_unique<NiceMock<MockRemoteDebuggingServer>>();
EXPECT_CALL(*server, StartHttpServer).Times(0);
server->StartHttpServerInApprovalMode(local_state);
testing::Mock::VerifyAndClearExpectations(server.get());
base::RunLoop start_run_loop;
EXPECT_CALL(*server, StartHttpServer)
.WillOnce(testing::WithoutArgs(
testing::Invoke(&start_run_loop, &base::RunLoop::Quit)));
local_state->SetUserPref(prefs::kDevToolsRemoteDebuggingEnabled,
std::make_unique<base::Value>(true));
start_run_loop.Run();
testing::Mock::VerifyAndClearExpectations(server.get());
base::RunLoop stop_run_loop;
EXPECT_CALL(*server, StopHttpServer)
.WillOnce(testing::Invoke(&stop_run_loop, &base::RunLoop::Quit));
local_state->SetUserPref(prefs::kDevToolsRemoteDebuggingEnabled,
std::make_unique<base::Value>(false));
stop_run_loop.Run();
testing::Mock::VerifyAndClearExpectations(server.get());
}
TEST_F(RemoteDebuggingServerTest, DoesNotStartWhenFeatureDisabled) {
base::test::ScopedFeatureList feature_list;
feature_list.InitAndDisableFeature(
features::kDevToolsAcceptDebuggingConnections);
TestingPrefServiceSimple* local_state =
TestingBrowserProcess::GetGlobal()->GetTestingLocalState();
auto server = RemoteDebuggingServer::GetInstance(local_state);
EXPECT_EQ(server.error(),
RemoteDebuggingServer::NotStartedReason::kNotRequested);
}
TEST_F(RemoteDebuggingServerTest, DoesNotStartWhenDisallowedByPolicy) {
NiceMock<policy::MockConfigurationPolicyProvider> policy_provider;
policy_provider.SetDefaultReturns(
/*is_initialization_complete_return=*/true,
/*is_first_policy_load_complete_return=*/true);
policy::BrowserPolicyConnector::SetPolicyProviderForTesting(&policy_provider);
TestingPrefServiceSimple* local_state =
TestingBrowserProcess::GetGlobal()->GetTestingLocalState();
local_state->SetManagedPref(prefs::kDevToolsRemoteDebuggingAllowed,
std::make_unique<base::Value>(false));
auto server = RemoteDebuggingServer::GetInstance(local_state);
EXPECT_EQ(server.error(),
RemoteDebuggingServer::NotStartedReason::kDisabledByPolicy);
policy::BrowserPolicyConnector::SetPolicyProviderForTesting(nullptr);
}
TEST_F(RemoteDebuggingServerTest, GetPortFromUserDataDir) {
base::ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
base::FilePath active_port_file =
temp_dir.GetPath().Append(content::kDevToolsActivePortFileName);
// Test with a valid port file.
ASSERT_TRUE(base::WriteFile(active_port_file, "12345"));
EXPECT_EQ(12345,
RemoteDebuggingServer::GetPortFromUserDataDir(temp_dir.GetPath()));
// Test with an empty port file.
ASSERT_TRUE(base::WriteFile(active_port_file, ""));
EXPECT_EQ(RemoteDebuggingServer::kDefaultDevToolsPort,
RemoteDebuggingServer::GetPortFromUserDataDir(temp_dir.GetPath()));
// Test with a malformed port file.
ASSERT_TRUE(base::WriteFile(active_port_file, "hello"));
EXPECT_EQ(RemoteDebuggingServer::kDefaultDevToolsPort,
RemoteDebuggingServer::GetPortFromUserDataDir(temp_dir.GetPath()));
// Test with a port file that has extra content.
ASSERT_TRUE(base::WriteFile(active_port_file, "12345\nfoo"));
EXPECT_EQ(12345,
RemoteDebuggingServer::GetPortFromUserDataDir(temp_dir.GetPath()));
// Test with a negative port.
ASSERT_TRUE(base::WriteFile(active_port_file, "-1"));
EXPECT_EQ(RemoteDebuggingServer::kDefaultDevToolsPort,
RemoteDebuggingServer::GetPortFromUserDataDir(temp_dir.GetPath()));
// Test with a valid port at the upper boundary.
ASSERT_TRUE(base::WriteFile(active_port_file, "65535"));
EXPECT_EQ(65535,
RemoteDebuggingServer::GetPortFromUserDataDir(temp_dir.GetPath()));
// Test with an out of bounds port.
ASSERT_TRUE(base::WriteFile(active_port_file, "65536"));
EXPECT_EQ(RemoteDebuggingServer::kDefaultDevToolsPort,
RemoteDebuggingServer::GetPortFromUserDataDir(temp_dir.GetPath()));
// Test with no port file.
ASSERT_TRUE(base::DeleteFile(active_port_file));
EXPECT_EQ(RemoteDebuggingServer::kDefaultDevToolsPort,
RemoteDebuggingServer::GetPortFromUserDataDir(temp_dir.GetPath()));
}
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