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transmission/tests/libtransmission/test-fixtures.h

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// This file Copyright (C) 2013-2022 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#pragma once
#include <chrono>
#include <condition_variable>
#include <cstdlib> // getenv()
#include <cstring> // strlen()
#include <iostream>
#include <memory>
#include <mutex> // std::once_flag()
#include <string>
#include <string_view>
#include <thread>
#include <event2/event.h>
#include <libtransmission/crypto-utils.h> // tr_base64_decode()
#include <libtransmission/error.h>
#include <libtransmission/file.h> // tr_sys_file_*()
#include <libtransmission/platform.h> // TR_PATH_DELIMITER
#include <libtransmission/quark.h>
#include <libtransmission/torrent-ctor.h>
#include <libtransmission/torrent.h>
#include <libtransmission/utils.h>
#include <libtransmission/variant.h>
#include "gtest/gtest.h"
using namespace std::literals;
inline std::ostream& operator<<(std::ostream& os, tr_error const& err)
{
os << err.message() << ' ' << err.code();
return os;
}
namespace libtransmission
{
namespace test
{
using file_func_t = std::function<void(char const* filename)>;
static void depthFirstWalk(char const* path, file_func_t func)
{
if (auto const info = tr_sys_path_get_info(path); info && info->isFolder())
{
if (auto const odir = tr_sys_dir_open(path); odir != TR_BAD_SYS_DIR)
{
for (;;)
{
char const* const name = tr_sys_dir_read_name(odir);
if (name == nullptr)
{
break;
}
if ("."sv != name && ".."sv != name)
{
auto const child = fmt::format("{:s}/{:s}"sv, path, name);
depthFirstWalk(child.c_str(), func);
}
}
tr_sys_dir_close(odir);
}
}
func(path);
}
inline bool waitFor(std::function<bool()> const& test, std::chrono::milliseconds msec)
{
auto const deadline = std::chrono::steady_clock::now() + msec;
for (;;)
{
if (test())
{
return true;
}
if (std::chrono::steady_clock::now() > deadline)
{
return false;
}
std::this_thread::sleep_for(10ms);
}
}
inline bool waitFor(std::function<bool()> const& test, int msec)
{
return waitFor(test, std::chrono::milliseconds{ msec });
}
inline bool waitFor(
struct event_base* evb,
std::function<bool()> const& test,
std::chrono::milliseconds msec = std::chrono::seconds{ 5 })
{
auto const deadline = std::chrono::steady_clock::now() + msec;
for (;;)
{
if (test())
{
return true;
}
if (std::chrono::steady_clock::now() > deadline)
{
return false;
}
event_base_loop(evb, EVLOOP_ONCE | EVLOOP_NONBLOCK);
}
}
class Sandbox
{
public:
Sandbox()
: parent_dir_{ get_default_parent_dir() }
, sandbox_dir_{ create_sandbox(parent_dir_, "transmission-test-XXXXXX") }
{
}
~Sandbox()
{
rimraf(sandbox_dir_);
}
std::string const& path() const
{
return sandbox_dir_;
}
protected:
static std::string get_default_parent_dir()
{
if (auto* const path = getenv("TMPDIR"); path != nullptr)
{
return path;
}
auto error = tr_error{};
return tr_sys_dir_get_current(&error);
}
static std::string create_sandbox(std::string const& parent_dir, std::string const& tmpl)
{
auto path = fmt::format(FMT_STRING("{:s}/{:s}"sv), tr_sys_path_resolve(parent_dir), tmpl);
tr_sys_dir_create_temp(std::data(path));
tr_sys_path_native_separators(std::data(path));
return path;
}
static void rimraf(std::string const& path, bool verbose = false)
{
auto remove = [verbose](char const* filename)
{
if (verbose)
{
std::cerr << "cleanup: removing '" << filename << "'" << std::endl;
}
tr_sys_path_remove(filename);
};
depthFirstWalk(path.c_str(), remove);
}
private:
std::string const parent_dir_;
std::string const sandbox_dir_;
};
class SandboxedTest : public ::testing::Test
{
protected:
std::string sandboxDir() const
{
return sandbox_.path();
}
auto currentTestName() const
{
auto const* i = ::testing::UnitTest::GetInstance()->current_test_info();
auto child = std::string(i->test_suite_name());
child += '_';
child += i->name();
return child;
}
void buildParentDir(std::string_view path) const
{
auto const tmperr = errno;
auto dir = tr_pathbuf{ path };
dir.popdir();
if (auto const info = tr_sys_path_get_info(path); !info)
{
auto error = tr_error{};
tr_sys_dir_create(dir, TR_SYS_DIR_CREATE_PARENTS, 0700, &error);
EXPECT_FALSE(error) << "path[" << path << "] dir[" << dir << "] " << error;
}
errno = tmperr;
}
static void blockingFileWrite(tr_sys_file_t fd, void const* data, size_t data_len, tr_error* error = nullptr)
{
auto local_error = tr_error{};
if (error == nullptr)
{
error = &local_error;
}
uint64_t n_left = data_len;
auto const* left = static_cast<uint8_t const*>(data);
while (n_left > 0)
{
uint64_t n = {};
if (!tr_sys_file_write(fd, left, n_left, &n, error))
{
fmt::print(stderr, "Error writing file: '{:s}'\n", error->message());
break;
}
left += n;
n_left -= n;
}
}
void createTmpfileWithContents(char* tmpl, void const* payload, size_t n) const
{
auto const tmperr = errno;
buildParentDir(tmpl);
auto error = tr_error{};
auto const fd = tr_sys_file_open_temp(tmpl, &error);
blockingFileWrite(fd, payload, n, &error);
tr_sys_file_flush(fd, &error);
tr_sys_file_flush(fd, &error);
tr_sys_file_close(fd, &error);
if (error)
{
fmt::print(
"Couldn't create '{path}': {error} ({error_code})\n",
fmt::arg("path", tmpl),
fmt::arg("error", error.message()),
fmt::arg("error_code", error.code()));
}
sync();
errno = tmperr;
}
void createFileWithContents(std::string_view path, void const* payload, size_t n) const
{
auto const tmperr = errno;
buildParentDir(path);
auto const fd = tr_sys_file_open(
tr_pathbuf{ path },
TR_SYS_FILE_WRITE | TR_SYS_FILE_CREATE | TR_SYS_FILE_TRUNCATE,
0600,
nullptr);
blockingFileWrite(fd, payload, n);
tr_sys_file_flush(fd);
tr_sys_file_flush(fd);
tr_sys_file_close(fd);
sync();
errno = tmperr;
}
void createFileWithContents(std::string_view path, std::string_view payload) const
{
createFileWithContents(path, std::data(payload), std::size(payload));
}
void createFileWithContents(std::string_view path, void const* payload) const
{
createFileWithContents(path, payload, strlen(static_cast<char const*>(payload)));
}
bool verbose = false;
void sync() const
{
#ifndef _WIN32
::sync();
#endif
}
private:
Sandbox sandbox_;
};
class SessionTest : public SandboxedTest
{
private:
std::shared_ptr<tr_variant> settings_;
tr_session* sessionInit(tr_variant& settings)
{
auto* const settings_map = settings.get_if<tr_variant::Map>();
EXPECT_NE(settings_map, nullptr);
// download dir
auto key = TR_KEY_download_dir;
auto val = settings_map->value_if<std::string_view>(key).value_or("Downloads"sv);
auto const download_dir = tr_pathbuf{ sandboxDir(), '/', val };
tr_sys_dir_create(download_dir, TR_SYS_DIR_CREATE_PARENTS, 0700);
(*settings_map)[key] = download_dir.sv();
// incomplete dir
key = TR_KEY_incomplete_dir;
val = settings_map->value_if<std::string_view>(key).value_or("Incomplete"sv);
auto const incomplete_dir = tr_pathbuf{ sandboxDir(), '/', val };
(*settings_map)[key] = incomplete_dir.sv();
// blocklists
tr_sys_dir_create(tr_pathbuf{ sandboxDir(), "/blocklists" }, TR_SYS_DIR_CREATE_PARENTS, 0700);
// fill in any missing settings
settings_map->try_emplace(TR_KEY_port_forwarding_enabled, false);
settings_map->try_emplace(TR_KEY_dht_enabled, false);
settings_map->try_emplace(TR_KEY_message_level, verbose ? TR_LOG_DEBUG : TR_LOG_ERROR);
return tr_sessionInit(sandboxDir().data(), !verbose, settings);
}
void sessionClose(tr_session* session)
{
tr_sessionClose(session);
tr_logFreeQueue(tr_logGetQueue());
}
protected:
enum class ZeroTorrentState
{
NoFiles,
Partial,
Complete
};
[[nodiscard]] tr_torrent* createTorrentAndWaitForVerifyDone(tr_ctor* ctor)
{
auto verified_lock = std::unique_lock(verified_mutex_);
auto const n_previously_verified = std::size(verified_);
ctor->set_verify_done_callback(
[this](tr_torrent* const tor)
{
auto lambda_verified_lock = std::lock_guard{ verified_mutex_ };
verified_.emplace_back(tor);
verified_cv_.notify_one();
});
auto* const tor = tr_torrentNew(ctor, nullptr);
auto const stop_waiting = [this, tor, n_previously_verified]()
{
return std::size(verified_) > n_previously_verified && verified_.back() == tor;
};
EXPECT_NE(nullptr, tor);
verified_cv_.wait_for(verified_lock, 20s, stop_waiting);
return tor;
}
[[nodiscard]] tr_torrent* zeroTorrentInit(ZeroTorrentState state)
{
// 1048576 files-filled-with-zeroes/1048576
// 4096 files-filled-with-zeroes/4096
// 512 files-filled-with-zeroes/512
char const* benc_base64 =
"ZDg6YW5ub3VuY2UzMTpodHRwOi8vd3d3LmV4YW1wbGUuY29tL2Fubm91bmNlMTA6Y3JlYXRlZCBi"
"eTI1OlRyYW5zbWlzc2lvbi8yLjYxICgxMzQwNykxMzpjcmVhdGlvbiBkYXRlaTEzNTg3MDQwNzVl"
"ODplbmNvZGluZzU6VVRGLTg0OmluZm9kNTpmaWxlc2xkNjpsZW5ndGhpMTA0ODU3NmU0OnBhdGhs"
"NzoxMDQ4NTc2ZWVkNjpsZW5ndGhpNDA5NmU0OnBhdGhsNDo0MDk2ZWVkNjpsZW5ndGhpNTEyZTQ6"
"cGF0aGwzOjUxMmVlZTQ6bmFtZTI0OmZpbGVzLWZpbGxlZC13aXRoLXplcm9lczEyOnBpZWNlIGxl"
"bmd0aGkzMjc2OGU2OnBpZWNlczY2MDpRiEMYSbRhMVL9e9umo/8KT9ZCS1GIQxhJtGExUv1726aj"
"/wpP1kJLUYhDGEm0YTFS/XvbpqP/Ck/WQktRiEMYSbRhMVL9e9umo/8KT9ZCS1GIQxhJtGExUv17"
"26aj/wpP1kJLUYhDGEm0YTFS/XvbpqP/Ck/WQktRiEMYSbRhMVL9e9umo/8KT9ZCS1GIQxhJtGEx"
"Uv1726aj/wpP1kJLUYhDGEm0YTFS/XvbpqP/Ck/WQktRiEMYSbRhMVL9e9umo/8KT9ZCS1GIQxhJ"
"tGExUv1726aj/wpP1kJLUYhDGEm0YTFS/XvbpqP/Ck/WQktRiEMYSbRhMVL9e9umo/8KT9ZCS1GI"
"QxhJtGExUv1726aj/wpP1kJLUYhDGEm0YTFS/XvbpqP/Ck/WQktRiEMYSbRhMVL9e9umo/8KT9ZC"
"S1GIQxhJtGExUv1726aj/wpP1kJLUYhDGEm0YTFS/XvbpqP/Ck/WQktRiEMYSbRhMVL9e9umo/8K"
"T9ZCS1GIQxhJtGExUv1726aj/wpP1kJLUYhDGEm0YTFS/XvbpqP/Ck/WQktRiEMYSbRhMVL9e9um"
"o/8KT9ZCS1GIQxhJtGExUv1726aj/wpP1kJLUYhDGEm0YTFS/XvbpqP/Ck/WQktRiEMYSbRhMVL9"
"e9umo/8KT9ZCS1GIQxhJtGExUv1726aj/wpP1kJLUYhDGEm0YTFS/XvbpqP/Ck/WQktRiEMYSbRh"
"MVL9e9umo/8KT9ZCS1GIQxhJtGExUv1726aj/wpP1kJLUYhDGEm0YTFS/XvbpqP/Ck/WQktRiEMY"
"SbRhMVL9e9umo/8KT9ZCS1GIQxhJtGExUv1726aj/wpP1kJLOlf5A+Tz30nMBVuNM2hpV3wg/103"
"OnByaXZhdGVpMGVlZQ==";
// create the torrent ctor
auto const benc = tr_base64_decode(benc_base64);
EXPECT_LT(0U, std::size(benc));
auto* ctor = tr_ctorNew(session_);
auto error = tr_error{};
EXPECT_TRUE(tr_ctorSetMetainfo(ctor, std::data(benc), std::size(benc), &error));
EXPECT_FALSE(error) << error;
tr_ctorSetPaused(ctor, TR_FORCE, true);
// maybe create the files
if (state != ZeroTorrentState::NoFiles)
{
auto const* const metainfo = tr_ctorGetMetainfo(ctor);
for (tr_file_index_t i = 0, n = metainfo->file_count(); i < n; ++i)
{
auto const base = state == ZeroTorrentState::Partial && tr_sessionIsIncompleteDirEnabled(session_) ?
tr_sessionGetIncompleteDir(session_) :
tr_sessionGetDownloadDir(session_);
auto const& subpath = metainfo->file_subpath(i);
auto const partial = state == ZeroTorrentState::Partial && i == 0;
auto const suffix = std::string_view{ partial ? ".part" : "" };
auto const filename = tr_pathbuf{ base, '/', subpath, suffix };
auto dirname = tr_pathbuf{ filename.sv() };
dirname.popdir();
tr_sys_dir_create(dirname, TR_SYS_DIR_CREATE_PARENTS, 0700);
auto fd = tr_sys_file_open(filename, TR_SYS_FILE_WRITE | TR_SYS_FILE_CREATE | TR_SYS_FILE_TRUNCATE, 0600);
auto const file_size = metainfo->file_size(i);
for (uint64_t j = 0; j < file_size; ++j)
{
auto const ch = partial && j < metainfo->piece_size() ? '\1' : '\0';
tr_sys_file_write(fd, &ch, 1, nullptr);
}
tr_sys_file_flush(fd);
tr_sys_file_close(fd);
}
}
auto* const tor = createTorrentAndWaitForVerifyDone(ctor);
tr_ctorFree(ctor);
return tor;
}
void blockingTorrentVerify(tr_torrent* tor)
{
EXPECT_NE(nullptr, tor->session);
EXPECT_FALSE(tor->session->am_in_session_thread());
auto verified_lock = std::unique_lock(verified_mutex_);
auto const n_previously_verified = std::size(verified_);
auto const stop_waiting = [this, tor, n_previously_verified]()
{
return std::size(verified_) > n_previously_verified && verified_.back() == tor;
};
tr_torrentVerify(tor);
verified_cv_.wait_for(verified_lock, 20s, stop_waiting);
}
tr_session* session_ = nullptr;
tr_variant* settings()
{
if (!settings_)
{
auto* settings = new tr_variant{};
tr_variantInitDict(settings, 10);
settings_.reset(settings);
}
return settings_.get();
}
virtual void SetUp() override
{
SandboxedTest::SetUp();
init_mgr_ = tr_lib_init();
session_ = sessionInit(*settings());
}
virtual void TearDown() override
{
sessionClose(session_);
session_ = nullptr;
settings_.reset();
SandboxedTest::TearDown();
}
private:
std::mutex verified_mutex_;
std::condition_variable verified_cv_;
std::vector<tr_torrent*> verified_;
std::unique_ptr<tr_net_init_mgr> init_mgr_;
};
} // namespace test
} // namespace libtransmission
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