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utils-tar.cpp
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utils-tar.cpp
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/*************************************************************************
* Copyright (C) 2017-2019 Barcelona Supercomputing Center *
* Centro Nacional de Supercomputacion *
* All rights reserved. *
* *
* This file is part of NORNS, a service that allows other programs to *
* start, track and manage asynchronous transfers of data resources *
* between different storage backends. *
* *
* See AUTHORS file in the top level directory for information regarding *
* developers and contributors. *
* *
* This software was developed as part of the EC H2020 funded project *
* NEXTGenIO (Project ID: 671951). *
* www.nextgenio.eu *
* *
* Permission is hereby granted, free of charge, to any person obtaining *
* a copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, sublicense, and/or sell copies of the Software, and to *
* permit persons to whom the Software is furnished to do so, subject to *
* the following conditions: *
* *
* The above copyright notice and this permission notice shall be *
* included in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, *
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND *
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS *
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN *
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN *
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE *
* SOFTWARE. *
*************************************************************************/
#include <boost/random.hpp>
#include <boost/generator_iterator.hpp>
#include "utils.hpp"
#include "compare-files.hpp"
#include "test-env.hpp"
#include "catch.hpp"
namespace {
constexpr static const std::size_t tar_header_size =
norns::utils::tar::TAR_BLOCK_SIZE;
constexpr static const std::size_t tar_record_size =
norns::utils::tar::TAR_BLOCK_SIZE;
constexpr static const std::size_t tar_eof_size =
2*norns::utils::tar::TAR_BLOCK_SIZE;
constexpr std::size_t
tar_aligned_size(std::size_t sz) {
return sz % tar_record_size != 0 ?
((sz & ~(tar_record_size - 1)) + tar_record_size) :
sz;
}
using rng = boost::mt19937;
using distribution = boost::uniform_int<>;
using size_generator =
boost::variate_generator<rng, distribution>;
bfs::path
create_hierarchy(test_env& env,
size_generator& size_gen,
const bfs::path& subdir,
const bfs::path& parent,
std::size_t subdirs_per_level,
std::size_t files_per_subdir,
std::size_t levels) {
if(levels == 0) {
return {};
}
bfs::path self = env.create_directory(subdir, parent);
for(std::size_t i = 0; i < files_per_subdir; ++i) {
std::string fname = "/regular_file" + std::to_string(i);
auto p = env.create_file(fname, self, size_gen());
}
if(levels == 1) {
return self;
}
for(std::size_t i = 0; i < subdirs_per_level; ++i) {
std::string dname = "/subdir" + std::to_string(i);
auto child = env.create_directory(dname, self);
(void) create_hierarchy(env, size_gen, dname, self, subdirs_per_level,
files_per_subdir, levels - 1);
}
return self;
}
std::string
exec(const std::string& cmd) {
std::array<char, 128> buffer;
std::string result;
int status;
std::cout << "exec(\"" << cmd << "\")";
auto deleter = [&status](FILE* stream) {
status = ::pclose(stream);
};
std::unique_ptr<FILE, decltype(deleter)> pipe(
::popen(cmd.c_str(), "r"), deleter);
if(!pipe) {
throw std::runtime_error("popen() failed!");
}
while(::fgets(buffer.data(), buffer.size(), pipe.get()) != nullptr) {
result += buffer.data();
}
return result;
}
std::error_code
extract(const bfs::path archive_path,
const bfs::path parent_dir) {
std::error_code ec;
if(!bfs::exists(parent_dir)) {
boost::system::error_code bec;
bfs::create_directories(parent_dir, bec);
if(bec) {
ec.assign(bec.value(), std::generic_category());
return ec;
}
}
std::string cmd("tar xf " + archive_path.string() + " -C " +
parent_dir.string());
auto res = ::exec(cmd);
std::cout << res << "\n";
return ec;
}
}
SCENARIO("tar creation", "[utils::tar::tar(filename, tar::create)]") {
GIVEN("an invalid output path") {
test_env env;
using norns::utils::tar;
bfs::path p = env.basedir();
WHEN("creating a tar archive") {
std::error_code ec;
tar t(p, tar::create, ec);
THEN("constructor fails") {
REQUIRE(ec);
}
}
env.notify_success();
}
GIVEN("a valid output path") {
test_env env;
using norns::utils::tar;
bfs::path p = env.basedir() / "archive.tar";
WHEN("creating a tar archive") {
std::error_code ec;
tar t(p, tar::create, ec);
THEN("constructor succeeds") {
REQUIRE(!ec);
REQUIRE(bfs::exists(p));
}
}
env.notify_success();
}
}
SCENARIO("appending files to a TAR archive",
"[utils::tar::add_file(path, alias, error_code)]") {
GIVEN("an invalid tar instance") {
test_env env;
using norns::utils::tar;
std::error_code ec;
tar t("", tar::create, ec);
REQUIRE(ec);
WHEN("trying to add a file") {
bfs::path file = env.create_file("/regular_file", env.basedir(), 0);
THEN("add_file() returns EINVAL") {
t.add_file(file, bfs::relative(file, env.basedir()), ec);
REQUIRE(ec);
REQUIRE(ec.value() == EINVAL);
}
}
env.notify_success();
}
GIVEN("a valid tar instance") {
test_env env;
using norns::utils::tar;
std::array<std::string, 6> filenames = {
"/regular_file0", "/regular_file1", "/regular_file2",
"/regular_file3", "/regular_file4", "/regular_file5",
};
std::array<std::size_t, 6> sizes = {
0, 10000, 20000, 2134513, 42, 50124887
};
std::vector<bfs::path> file_paths;
for(std::size_t i = 0; i < filenames.size(); ++i) {
file_paths.emplace_back(
env.create_file(filenames[i], env.basedir(), sizes[i]));
}
bfs::path p = env.basedir() / "archive.tar";
std::error_code ec;
tar t(p, tar::create, ec);
REQUIRE(!ec);
WHEN("adding an empty file") {
t.add_file(file_paths[0],
bfs::relative(file_paths[0], env.basedir()), ec);
THEN("add_file() succeeds") {
REQUIRE(!ec);
AND_THEN("the archive contains the added file") {
t.release(); // make sure data has been written to archive
const bfs::path parent_dir(env.basedir() / "tmp");
ec = ::extract(t.path(), parent_dir);
REQUIRE(!ec);
REQUIRE(bfs::exists(parent_dir / filenames[0]));
REQUIRE(compare_files(
file_paths[0], parent_dir / filenames[0]));
}
}
}
WHEN("adding a non-empty file") {
t.add_file(file_paths[1],
bfs::relative(file_paths[1], env.basedir()), ec);
THEN("add_file() succeeds") {
REQUIRE(!ec);
AND_THEN("the archive contains the added file") {
t.release(); // make sure data has been written to archive
const bfs::path parent_dir(env.basedir() / "tmp");
ec = ::extract(t.path(), parent_dir);
REQUIRE(!ec);
REQUIRE(bfs::exists(parent_dir / filenames[1]));
REQUIRE(compare_files(
file_paths[1], parent_dir / filenames[1]));
}
}
}
WHEN("adding several files") {
std::vector<std::error_code> ecs;
for(std::size_t i = 0; i < file_paths.size(); ++i) {
t.add_file(file_paths[i],
bfs::relative(file_paths[i], env.basedir()), ec);
ecs.emplace_back(ec);
}
THEN("add_file() succeeds") {
for(const auto err : ecs) {
REQUIRE(!err);
}
AND_THEN("the archive contains all added files") {
t.release(); // make sure data has been written to archive
const bfs::path parent_dir(env.basedir() / "tmp");
ec = ::extract(t.path(), parent_dir);
REQUIRE(!ec);
for(std::size_t i = 0; i < file_paths.size(); ++i) {
REQUIRE(bfs::exists(parent_dir / filenames[i]));
REQUIRE(compare_files(
file_paths[i], parent_dir / filenames[i]));
}
}
}
}
env.notify_success();
}
}
SCENARIO("appending directories to a TAR archive",
"[utils::tar::add_directory(path, alias, error_code)]") {
GIVEN("an invalid tar instance") {
test_env env;
using norns::utils::tar;
std::error_code ec;
tar t("", tar::create, ec);
REQUIRE(ec);
WHEN("trying to add a directory") {
bfs::path subdir = env.create_directory("/subdir", env.basedir());
THEN("add_directory() returns EINVAL") {
t.add_directory(subdir,
bfs::relative(subdir, env.basedir()), ec);
REQUIRE(ec);
REQUIRE(ec.value() == EINVAL);
}
}
env.notify_success();
}
GIVEN("a valid tar instance") {
test_env env;
using norns::utils::tar;
std::array<std::string, 6> filenames = {
"/regular_file0", "/regular_file1", "/regular_file2",
"/regular_file3", "/regular_file4", "/regular_file5",
};
std::array<std::size_t, 6> sizes = {
0, 10000, 20000, 2134513, 42, 5012488//7
};
std::vector<bfs::path> file_paths;
bfs::path subdir =
env.create_directory("/subdir", env.basedir());
for(std::size_t i = 0; i < filenames.size(); ++i) {
file_paths.emplace_back(
env.create_file(filenames[i], subdir, sizes[i]));
}
bfs::path p = env.basedir() / "archive.tar";
std::error_code ec;
tar t(p, tar::create, ec);
REQUIRE(!ec);
WHEN("adding an empty directory") {
bfs::path empty_subdir =
env.create_directory("/empty_subdir", env.basedir());
t.add_directory(empty_subdir,
bfs::relative(empty_subdir, env.basedir()), ec);
THEN("add_directory() succeeds") {
REQUIRE(!ec);
AND_THEN("the archive contains the added directory") {
t.release(); // make sure data has been written to archive
const bfs::path parent_dir(env.basedir() / "tmp");
ec = ::extract(t.path(), parent_dir);
REQUIRE(!ec);
REQUIRE(bfs::exists(parent_dir / "/empty_subdir"));
REQUIRE(compare_directories(
empty_subdir, parent_dir / "/empty_subdir"));
}
}
}
WHEN("adding a non-empty directory containing only files and "
"defining a 1-level alias (e.g. subdir0/ -> subdir1/ ) ") {
t.add_directory(subdir,
bfs::relative(subdir, env.basedir()), ec);
THEN("add_directory() succeeds") {
REQUIRE(!ec);
AND_THEN("the archive contains the added directory") {
t.release(); // make sure data has been written to archive
const bfs::path parent_dir(env.basedir() / "tmp");
ec = ::extract(t.path(), parent_dir);
REQUIRE(!ec);
REQUIRE(bfs::exists(parent_dir / "/subdir"));
AND_THEN("both directories are identical") {
REQUIRE(compare_directories(
subdir, parent_dir / "/subdir"));
}
}
}
}
WHEN("adding a non-empty directory containing only files and defining "
"a multi-level alias (e.g. subdir0/ -> subdir1/a/b/c/ )") {
t.add_directory(subdir,
bfs::relative(subdir, env.basedir()) / "a/b/c/", ec);
THEN("add_directory() succeeds") {
REQUIRE(!ec);
AND_THEN("the archive contains the added directory") {
t.release(); // make sure data has been written to archive
const bfs::path parent_dir(env.basedir() / "tmp");
ec = ::extract(t.path(), parent_dir);
REQUIRE(!ec);
REQUIRE(bfs::exists(parent_dir / "/subdir"));
REQUIRE(bfs::exists(parent_dir / "/subdir/a/"));
REQUIRE(bfs::exists(parent_dir / "/subdir/a/b/"));
REQUIRE(bfs::exists(parent_dir / "/subdir/a/b/c/"));
AND_THEN("contents are identical") {
REQUIRE(compare_directories(
subdir, parent_dir / "/subdir/a/b/c"));
}
}
}
}
WHEN("adding a non-empty directory containing only files and "
"defining an empty alias") {
t.add_directory(subdir, "", ec);
THEN("add_directory() succeeds") {
REQUIRE(!ec);
AND_THEN("the archive does not contain the added directory") {
t.release(); // make sure data has been written to archive
const bfs::path parent_dir(env.basedir() / "tmp");
ec = ::extract(t.path(), parent_dir);
REQUIRE(!ec);
REQUIRE(!bfs::exists(parent_dir / "/subdir"));
AND_THEN("contents are identical") {
REQUIRE(compare_directories(subdir, parent_dir));
}
}
}
}
WHEN("adding a non-empty directory containing only files and "
"defining '/' as an alias") {
t.add_directory(subdir, "/", ec);
THEN("add_directory() succeeds") {
REQUIRE(!ec);
AND_THEN("the archive does not contain the added directory") {
t.release(); // make sure data has been written to archive
const bfs::path parent_dir(env.basedir() / "tmp");
ec = ::extract(t.path(), parent_dir);
REQUIRE(!ec);
REQUIRE(!bfs::exists(parent_dir / "/subdir"));
AND_THEN("contents are identical") {
REQUIRE(compare_directories(subdir, parent_dir));
}
}
}
}
WHEN("adding a non-empty directory containing files and subdirs, and "
"defining a 1-level alias (e.g. subdir0/ -> subdir1/ ) ") {
size_generator gen(rng{42}, distribution{0, 42});
bfs::path complex_subdir =
create_hierarchy(env, gen, "/complex_subdir", env.basedir(),
2, 5, 5);
t.add_directory(complex_subdir,
bfs::relative(complex_subdir, env.basedir()), ec);
THEN("add_directory() succeeds") {
REQUIRE(!ec);
AND_THEN("the archive contains the added directory") {
t.release(); // make sure data has been written to archive
const bfs::path parent_dir(env.basedir() / "tmp");
ec = ::extract(t.path(), parent_dir);
REQUIRE(!ec);
REQUIRE(bfs::exists(parent_dir / "/complex_subdir"));
AND_THEN("both directories are identical") {
REQUIRE(compare_directories(
complex_subdir,
parent_dir / "/complex_subdir"));
}
}
}
}
WHEN("adding a non-empty directory containing files and subdirs, and "
"defining a multi-level alias (e.g. subdir0/ -> "
"subdir1/a/b/c/ )") {
size_generator gen(rng{42}, distribution{0, 42});
bfs::path complex_subdir =
create_hierarchy(env, gen, "/complex_subdir", env.basedir(),
2, 5, 5);
t.add_directory(
complex_subdir,
bfs::relative(complex_subdir, env.basedir()) / "a/b/c/", ec);
THEN("add_directory() succeeds") {
REQUIRE(!ec);
AND_THEN("the archive contains the added directory") {
t.release(); // make sure data has been written to archive
const bfs::path parent_dir(env.basedir() / "tmp");
ec = ::extract(t.path(), parent_dir);
REQUIRE(!ec);
REQUIRE(bfs::exists(parent_dir / "/complex_subdir"));
REQUIRE(bfs::exists(parent_dir / "/complex_subdir/a/"));
REQUIRE(bfs::exists(parent_dir / "/complex_subdir/a/b/"));
REQUIRE(bfs::exists(parent_dir / "/complex_subdir/a/b/c/"));
AND_THEN("both directories are identical") {
REQUIRE(compare_directories(
complex_subdir,
parent_dir / "/complex_subdir/a/b/c"));
}
}
}
}
env.notify_success();
}
}
SCENARIO("extracting from a tar archive",
"[utils::tar::extract(destination_path, error_code)]") {
GIVEN("an invalid tar instance") {
test_env env;
using norns::utils::tar;
std::error_code ec;
tar t("", tar::open, ec);
REQUIRE(ec);
WHEN("trying to extract the archive") {
std::error_code ec;
bfs::path tmpdir = env.create_directory("/tmp", env.basedir());
t.extract(tmpdir, ec);
THEN("extract() returns EINVAL") {
REQUIRE(ec);
REQUIRE(ec.value() == EINVAL);
}
}
env.notify_success();
}
GIVEN("a valid tar instance") {
test_env env;
using norns::utils::tar;
bfs::path tmp_dir = env.create_directory("/tmp", env.basedir());
size_generator gen(rng(42), distribution(0, 42));
bfs::path complex_subdir =
create_hierarchy(env, gen, "/complex_subdir", env.basedir(),
2, 5, 5);
bfs::path p = env.basedir() / "archive.tar";
{
std::error_code ec;
tar t(p, tar::create, ec);
REQUIRE(!ec);
t.add_directory(complex_subdir, "", ec);
REQUIRE(!ec);
}
WHEN("trying to extract the archive to \"\"") {
std::error_code ec;
tar t(p, tar::open, ec);
REQUIRE(!ec);
t.extract("", ec);
THEN("extract() returns EINVAL") {
REQUIRE(ec);
REQUIRE(ec.value() == EINVAL);
}
}
env.notify_success();
}
GIVEN("a valid tar instance") {
test_env env;
using norns::utils::tar;
bfs::path tmp_dir = env.create_directory("/tmp", env.basedir());
size_generator gen(rng(42), distribution(0, 42));
bfs::path complex_subdir =
create_hierarchy(env, gen, "/complex_subdir", env.basedir(),
2, 5, 5);
bfs::path p = env.basedir() / "archive.tar";
{
std::error_code ec;
tar t(p, tar::create, ec);
REQUIRE(!ec);
t.add_directory(complex_subdir, "", ec);
REQUIRE(!ec);
}
WHEN("trying to extract the archive to a path leading to a file") {
std::error_code ec;
tar t(p, tar::open, ec);
REQUIRE(!ec);
t.extract(p, ec);
THEN("extract() returns EINVAL") {
REQUIRE(ec);
REQUIRE(ec.value() == EINVAL);
}
}
env.notify_success();
}
GIVEN("a valid tar instance") {
test_env env;
using norns::utils::tar;
bfs::path tmp_dir = env.create_directory("/tmp", env.basedir());
bfs::path file = env.create_file("/fake.tar", env.basedir(), 0);
WHEN("trying to extract from something that looks like an archive ") {
std::error_code ec;
tar t(file, tar::open, ec);
THEN("constructor() fails") {
REQUIRE(ec);
}
}
env.notify_success();
}
GIVEN("a valid tar instance and an archive with alias \"\"") {
test_env env;
using norns::utils::tar;
bfs::path tmp_dir = env.create_directory("/tmp", env.basedir());
size_generator gen(rng(42), distribution(0, 42));
bfs::path complex_subdir =
create_hierarchy(env, gen, "/complex_subdir", env.basedir(),
2, 5, 5);
bfs::path p = env.basedir() / "archive.tar";
std::error_code ec;
{
tar t(p, tar::create, ec);
REQUIRE(!ec);
t.add_directory(complex_subdir, "", ec);
REQUIRE(!ec);
}
WHEN("trying to extract the archive to a path leading to a directory") {
tar t(p, tar::open, ec);
REQUIRE(!ec);
THEN("extract() succeeds") {
t.extract(tmp_dir, ec);
REQUIRE(!ec);
AND_THEN("the specified directory contains the archive "
"contents and they are identical to the original") {
REQUIRE(compare_directories(complex_subdir, tmp_dir));
}
}
}
env.notify_success();
}
GIVEN("a valid tar instance and an archive with a 1-level alias") {
test_env env;
using norns::utils::tar;
bfs::path tmp_dir = env.create_directory("/tmp", env.basedir());
size_generator gen(rng(42), distribution(0, 42));
bfs::path complex_subdir =
create_hierarchy(env, gen, "/complex_subdir", env.basedir(),
2, 5, 5);
bfs::path p = env.basedir() / "archive.tar";
std::error_code ec;
{
tar t(p, tar::create, ec);
REQUIRE(!ec);
t.add_directory(complex_subdir, "/alias_subdir", ec);
REQUIRE(!ec);
}
WHEN("trying to extract the archive to a path leading to a directory") {
tar t(p, tar::open, ec);
REQUIRE(!ec);
THEN("extract() succeeds") {
t.extract(tmp_dir, ec);
REQUIRE(!ec);
AND_THEN("the specified directory contains the archive "
"contents and they are identical to the original") {
REQUIRE(bfs::exists(tmp_dir / "/alias_subdir"));
REQUIRE(compare_directories(
complex_subdir, tmp_dir / "/alias_subdir"));
}
}
}
env.notify_success();
}
GIVEN("a valid tar instance and an archive with a multi-level alias") {
test_env env;
using norns::utils::tar;
bfs::path tmp_dir = env.create_directory("/tmp", env.basedir());
size_generator gen(rng(42), distribution(0, 42));
bfs::path complex_subdir =
create_hierarchy(env, gen, "/complex_subdir", env.basedir(),
2, 5, 5);
bfs::path p = env.basedir() / "archive.tar";
std::error_code ec;
{
tar t(p, tar::create, ec);
REQUIRE(!ec);
t.add_directory(complex_subdir, "/alias_subdir/a/b/c", ec);
REQUIRE(!ec);
}
WHEN("trying to extract the archive to a path leading to a directory") {
tar t(p, tar::open, ec);
REQUIRE(!ec);
THEN("extract() succeeds") {
t.extract(tmp_dir, ec);
REQUIRE(!ec);
AND_THEN("the specified directory contains the archive "
"contents and they are identical to the original") {
REQUIRE(bfs::exists(tmp_dir / "/alias_subdir/a/b/c"));
REQUIRE(compare_directories(
complex_subdir,
tmp_dir / "/alias_subdir/a/b/c"));
}
}
}
env.notify_success();
}
}
SCENARIO("tar size estimation", "[utils::tar::estimate_packed_size()]") {
GIVEN("a path to a regular file of 0 bytes") {
test_env env;
using norns::utils::tar;
bfs::path file = env.create_file("/regular_file", env.basedir(), 0);
THEN("estimated size follows formula") {
std::error_code ec;
std::size_t psize = tar::estimate_size_once_packed(file, ec);
REQUIRE(psize == tar_header_size +
tar_eof_size);
AND_THEN("size of generated TAR archive matches estimated one") {
bfs::path file_tar = file;
file_tar.replace_extension(".tar");
{
tar t(file_tar, tar::create, ec);
REQUIRE(!ec);
t.add_file(file, bfs::relative(file, env.basedir()), ec);
REQUIRE(!ec);
}
// this check needs to be done after tar::~tar() has been
// called, since it appends the EOF blocks
REQUIRE(psize == bfs::file_size(file_tar));
}
}
env.notify_success();
}
GIVEN("a path to a regular file of tar_record_size bytes") {
test_env env;
using norns::utils::tar;
bfs::path file =
env.create_file("/regular_file", env.basedir(), tar_header_size);
THEN("estimated size follows formula") {
std::error_code ec;
std::size_t psize = tar::estimate_size_once_packed(file, ec);
REQUIRE(psize == tar_header_size +
tar_header_size +
tar_eof_size);
AND_THEN("size of generated TAR archive matches estimated one") {
bfs::path file_tar = file;
file_tar.replace_extension(".tar");
{
tar t(file_tar, tar::create, ec);
REQUIRE(!ec);
t.add_file(file, bfs::relative(file, env.basedir()), ec);
REQUIRE(!ec);
}
// this check needs to be done after tar::~tar() has been
// called, since it appends the EOF blocks
REQUIRE(psize == bfs::file_size(file_tar));
}
}
env.notify_success();
}
GIVEN("a path to a regular file of 2*tar_record_size bytes") {
test_env env;
using norns::utils::tar;
bfs::path file =
env.create_file("/regular_file", env.basedir(), 2*tar_header_size);
THEN("estimated size follows formula") {
std::error_code ec;
std::size_t psize = tar::estimate_size_once_packed(file, ec);
REQUIRE(psize == tar_header_size +
2*tar_header_size +
tar_eof_size);
AND_THEN("size of generated TAR archive matches estimated one") {
bfs::path file_tar = file;
file_tar.replace_extension(".tar");
{
tar t(file_tar, tar::create, ec);
REQUIRE(!ec);
t.add_file(file, bfs::relative(file, env.basedir()), ec);
REQUIRE(!ec);
}
// this check needs to be done after tar::~tar() has been
// called, since it appends the EOF blocks
REQUIRE(psize == bfs::file_size(file_tar));
}
}
env.notify_success();
}
GIVEN("a path to a regular file of 10000 bytes") {
test_env env;
using norns::utils::tar;
bfs::path file =
env.create_file("/regular_file", env.basedir(), 10000);
THEN("estimated size follows formula") {
std::error_code ec;
std::size_t psize = tar::estimate_size_once_packed(file, ec);
REQUIRE(psize == tar_header_size +
tar_aligned_size(10000) +
tar_eof_size);
AND_THEN("size of generated TAR archive matches estimated one") {
bfs::path file_tar = file;
file_tar.replace_extension(".tar");
{
tar t(file_tar, tar::create, ec);
REQUIRE(!ec);
t.add_file(file, bfs::relative(file, env.basedir()), ec);
REQUIRE(!ec);
}
// this check needs to be done after tar::~tar() has been
// called, since it appends the EOF blocks
REQUIRE(psize == bfs::file_size(file_tar));
}
}
env.notify_success();
}
GIVEN("a path to an empty directory") {
test_env env;
using norns::utils::tar;
bfs::path subdir = env.create_directory("/subdir", env.basedir());
THEN("estimated size follows formula") {
std::error_code ec;