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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 "chromeos/ash/components/data_migration/device.h"
#include <algorithm>
#include <cstdint>
#include <optional>
#include <utility>
#include "base/base_paths.h"
#include "base/containers/flat_map.h"
#include "base/containers/flat_set.h"
#include "base/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/memory/raw_ptr.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
#include "base/test/bind.h"
#include "base/test/run_until.h"
#include "base/test/scoped_path_override.h"
#include "base/test/scoped_run_loop_timeout.h"
#include "base/test/task_environment.h"
#include "base/timer/timer.h"
#include "chromeos/ash/components/data_migration/constants.h"
#include "chromeos/ash/components/data_migration/testing/connection_barrier.h"
#include "chromeos/ash/components/data_migration/testing/fake_nearby_connections.h"
#include "chromeos/ash/components/data_migration/testing/fake_nearby_process_manager.h"
#include "chromeos/ash/components/nearby/common/connections_manager/nearby_connections_manager.h"
#include "chromeos/ash/components/nearby/common/connections_manager/nearby_connections_manager_impl.h"
#include "chromeos/ash/services/nearby/public/mojom/nearby_connections_types.mojom.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace data_migration {
namespace {
constexpr char kRemoteEndpointId[] = "test-remote-endpoint";
class DeviceTest : public ::testing::Test {
public:
DeviceTest()
: nearby_process_manager_(kRemoteEndpointId),
nearby_connections_manager_(&nearby_process_manager_, kServiceId) {}
void SetUp() override {
ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
home_dir_override_.emplace(base::DIR_HOME, temp_dir_.GetPath());
ConnectionBarrier connection_barrier(&nearby_connections_manager_);
NearbyConnection* nearby_connection = connection_barrier.Wait();
ASSERT_TRUE(nearby_connection);
ASSERT_TRUE(base::CreateDirectory(GetFilePayloadDirectory()));
nearby_process_manager_.fake_nearby_connections()
.set_local_to_remote_payload_listener(base::BindRepeating(
&DeviceTest::RespondToCtsMessage, base::Unretained(this)));
device_.emplace(nearby_connection, &nearby_connections_manager_);
}
base::FilePath GetFilePayloadDirectory() {
return temp_dir_.GetPath().Append(kPayloadTargetDir);
}
base::FilePath BuildFilePayloadName(int64_t payload_id) {
return base::FilePath(base::StringPrintf("payload_%ld", payload_id));
}
base::FilePath BuildFilePayloadPath(int64_t payload_id) {
return GetFilePayloadDirectory().Append(BuildFilePayloadName(payload_id));
}
void RespondToCtsMessage(
::nearby::connections::mojom::PayloadPtr cts_payload) {
ASSERT_TRUE(cts_payload);
ASSERT_TRUE(cts_payload->content->is_bytes());
const std::vector<uint8_t>& cts_bytes =
cts_payload->content->get_bytes()->bytes;
int64_t file_payload_id_to_transmit = 0;
ASSERT_TRUE(
base::StringToInt64(std::string(cts_bytes.begin(), cts_bytes.end()),
&file_payload_id_to_transmit));
ASSERT_TRUE(
requested_file_payload_ids_.contains(file_payload_id_to_transmit));
ASSERT_TRUE(nearby_process_manager_.fake_nearby_connections().SendFile(
file_payload_id_to_transmit,
&expected_file_content_[file_payload_id_to_transmit]));
}
void SendRts(int64_t file_payload_id) {
// Must not intersect with file payload ids, which are assigned starting at
// "1" in test cases below.
static int64_t g_rts_payload_id_assigner = 1000000;
ASSERT_TRUE(
nearby_process_manager_.fake_nearby_connections().SendBytesPayload(
/*payload_id=*/g_rts_payload_id_assigner,
base::NumberToString(file_payload_id)));
++g_rts_payload_id_assigner;
requested_file_payload_ids_.insert(file_payload_id);
}
bool FileIsReady(int64_t payload_id) {
base::FilePath file_path = BuildFilePayloadPath(payload_id);
std::optional<int64_t> file_size_in_bytes = base::GetFileSize(file_path);
return file_size_in_bytes.has_value() &&
file_size_in_bytes.value() >=
nearby_process_manager_.fake_nearby_connections()
.test_file_size_in_bytes();
}
base::flat_set</*payload_id*/ int64_t> requested_file_payload_ids_;
base::flat_map</*payload_id*/ int64_t, std::vector<uint8_t>>
expected_file_content_;
base::test::TaskEnvironment task_environment_;
base::ScopedTempDir temp_dir_;
std::optional<base::ScopedPathOverride> home_dir_override_;
FakeNearbyProcessManager nearby_process_manager_;
NearbyConnectionsManagerImpl nearby_connections_manager_;
std::optional<Device> device_;
};
TEST_F(DeviceTest, TransmitsAllFiles) {
// Remote device send RTS for some files.
SendRts(/*file_payload_id=*/1);
SendRts(/*file_payload_id=*/2);
SendRts(/*file_payload_id=*/3);
ASSERT_TRUE(base::test::RunUntil([this]() {
// All expected files have been written to disc.
return std::ranges::all_of(
requested_file_payload_ids_,
[this](int64_t payload_id) { return FileIsReady(payload_id); });
}));
// For extra safety, flush any pending tasks to ensure the `Device` is
// completely idle before checking the results.
task_environment_.RunUntilIdle();
EXPECT_EQ(base::ReadFileToBytes(BuildFilePayloadPath(/*payload_id=*/1)),
expected_file_content_.at(/*payload_id=*/1));
EXPECT_EQ(base::ReadFileToBytes(BuildFilePayloadPath(/*payload_id=*/2)),
expected_file_content_.at(/*payload_id=*/2));
EXPECT_EQ(base::ReadFileToBytes(BuildFilePayloadPath(/*payload_id=*/3)),
expected_file_content_.at(/*payload_id=*/3));
}
// Verifies that the Device can be destroyed gracefully mid-transfer. Does not
// have any real expectation other than the code doesn't crash.
TEST_F(DeviceTest, ShutsDownMidTransfer) {
constexpr int64_t kTotalNumFilesToTransmit = 5;
// Remote device send RTS for some files.
for (int64_t file_payload_id = 1; file_payload_id <= kTotalNumFilesToTransmit;
++file_payload_id) {
nearby_process_manager_.fake_nearby_connections().SetFinalFilePayloadStatus(
::nearby::connections::mojom::PayloadStatus::kInProgress,
file_payload_id);
SendRts(file_payload_id);
}
ASSERT_TRUE(base::test::RunUntil([this]() {
// Any file has been written to disc (exit any time mid-transfer).
for (auto payload_id : requested_file_payload_ids_) {
if (base::PathExists(BuildFilePayloadPath(payload_id))) {
return true;
}
}
return false;
}));
ASSERT_LT(base::ComputeDirectorySize(temp_dir_.GetPath()),
kTotalNumFilesToTransmit *
nearby_process_manager_.fake_nearby_connections()
.test_file_size_in_bytes());
device_.reset();
}
TEST_F(DeviceTest, ContinuesTransmittingFilesAfterFailure) {
nearby_process_manager_.fake_nearby_connections().SetFinalFilePayloadStatus(
::nearby::connections::mojom::PayloadStatus::kFailure, /*payload_id=*/2);
// Remote device send RTS for some files.
SendRts(/*file_payload_id=*/1);
SendRts(/*file_payload_id=*/2);
SendRts(/*file_payload_id=*/3);
ASSERT_TRUE(base::test::RunUntil([this]() {
return FileIsReady(/*payload_id=*/1) && FileIsReady(/*payload_id=*/3);
}));
// For extra safety, flush any pending tasks to ensure the `Device` is
// completely idle before checking the results.
task_environment_.RunUntilIdle();
EXPECT_EQ(base::ReadFileToBytes(BuildFilePayloadPath(/*payload_id=*/1)),
expected_file_content_.at(/*payload_id=*/1));
EXPECT_EQ(base::ReadFileToBytes(BuildFilePayloadPath(/*payload_id=*/3)),
expected_file_content_.at(/*payload_id=*/3));
}
TEST_F(DeviceTest, FileStressTest) {
constexpr int64_t kTotalNumFilesToTransmit = 5000;
// Reduce these numbers from their defaults otherwise the test takes 3-4x
// longer.
constexpr int64_t kFileSizeInBytes = 1;
constexpr int64_t kNumChunksPerFile = 1;
// Empirically, this test takes about 15 seconds.
base::test::ScopedRunLoopTimeout test_timeout(FROM_HERE, base::Minutes(1));
nearby_process_manager_.fake_nearby_connections().set_test_file_size_in_bytes(
kFileSizeInBytes);
nearby_process_manager_.fake_nearby_connections().set_test_file_num_chunks(
kNumChunksPerFile);
// Remote device send RTS for some files.
for (int64_t payload_id = 1; payload_id <= kTotalNumFilesToTransmit;
++payload_id) {
SendRts(payload_id);
}
base::RepeatingClosure test_complete_signal = task_environment_.QuitClosure();
// The `test_completion_check` is expensive, so it's run on a blocking thread,
// freeing the main thread for the test itself.
base::RepeatingClosure test_completion_check =
base::BindLambdaForTesting([this, test_complete_signal]() {
if (base::ComputeDirectorySize(GetFilePayloadDirectory()) >=
kTotalNumFilesToTransmit * kFileSizeInBytes) {
test_complete_signal.Run();
}
});
scoped_refptr<base::SequencedTaskRunner> test_completion_sequence =
base::ThreadPool::CreateSequencedTaskRunner({base::MayBlock()});
auto test_completion_checker = std::make_unique<base::RepeatingTimer>();
test_completion_sequence->PostTask(
FROM_HERE, base::BindLambdaForTesting([&test_completion_checker,
test_completion_check]() {
constexpr base::TimeDelta kTestCompletionCheckInterval =
base::Seconds(1);
test_completion_checker->Start(FROM_HERE, kTestCompletionCheckInterval,
test_completion_check);
}));
task_environment_.RunUntilQuit();
test_completion_sequence->DeleteSoon(FROM_HERE,
std::move(test_completion_checker));
// Flush any pending ThreadPool tasks scheduled internally by `DataMigration`
// before exiting.
task_environment_.RunUntilIdle();
}
} // namespace
} // namespace data_migration
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