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#include <kapi/filesystem.hpp>
#include <kernel/test_support/filesystem/storage_boot_module_vfs_fixture.hpp>
#include <catch2/catch_test_macros.hpp>
#include <algorithm>
#include <cstddef>
#include <filesystem>
#include <string_view>
#include <vector>
SCENARIO_METHOD(kernel::tests::filesystem::storage_boot_module_vfs_fixture, "Kapi filesystem with real images",
"[kapi][filesystem]")
{
auto const image_path_1 = std::filesystem::path{KERNEL_TEST_ASSETS_DIR} / "ext2_1KB_fs.img";
auto const image_path_2 = std::filesystem::path{KERNEL_TEST_ASSETS_DIR} / "ext2_2KB_fs.img";
GIVEN("Two real image files")
{
REQUIRE(std::filesystem::exists(image_path_1));
REQUIRE(std::filesystem::exists(image_path_2));
REQUIRE_NOTHROW(
setup_modules_from_img_and_init_vfs({"test_img_module_1", "test_img_module_2"}, {image_path_1, image_path_2}));
THEN("files can be opened, read and closed again")
{
auto fd = kapi::filesystem::open("/information/info_1.txt");
REQUIRE(fd >= 0);
auto buffer = std::vector<std::byte>(6);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read >= 0);
std::string_view buffer_as_str{reinterpret_cast<char *>(buffer.data()), static_cast<size_t>(bytes_read)};
REQUIRE(buffer_as_str == "info_1");
REQUIRE(kapi::filesystem::close(fd) == 0);
}
THEN("files can be opened through absolute symbolic link, read and closed again")
{
auto fd = kapi::filesystem::open("/symlinks/information_directory_absolute/info_1.txt");
REQUIRE(fd >= 0);
auto buffer = std::vector<std::byte>(6);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read >= 0);
std::string_view buffer_as_str{reinterpret_cast<char *>(buffer.data()), static_cast<size_t>(bytes_read)};
REQUIRE(buffer_as_str == "info_1");
REQUIRE(kapi::filesystem::close(fd) == 0);
}
THEN("files can be opened through relative symbolic link, read and closed again")
{
auto fd = kapi::filesystem::open("/symlinks/information_directory_relative/info_1.txt");
REQUIRE(fd >= 0);
auto buffer = std::vector<std::byte>(6);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read >= 0);
std::string_view buffer_as_str{reinterpret_cast<char *>(buffer.data()), static_cast<size_t>(bytes_read)};
REQUIRE(buffer_as_str == "info_1");
REQUIRE(kapi::filesystem::close(fd) == 0);
}
THEN("files can be opened through relative symbolic link over multiple mount points, read and closed again")
{
kapi::filesystem::mount("/archiv/2024.img", "/information");
auto fd = kapi::filesystem::open("/information/symlinks/traverse_back_twice/information/sheep_1.txt");
REQUIRE(fd >= 0);
auto buffer = std::vector<std::byte>(7);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read >= 0);
std::string_view buffer_as_str{reinterpret_cast<char *>(buffer.data()), static_cast<size_t>(bytes_read)};
REQUIRE(buffer_as_str == "sheep_1");
REQUIRE(kapi::filesystem::close(fd) == 0);
}
THEN("a filesystem can be mounted, files can be opened, read and closed again and unmounted")
{
REQUIRE(kapi::filesystem::mount("/dev/ram16", "/information") == 0);
auto fd = kapi::filesystem::open("/information/monkey_house/monkey_1.txt");
REQUIRE(fd >= 0);
auto buffer = std::vector<std::byte>(8);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read >= 0);
std::string_view buffer_as_str{reinterpret_cast<char *>(buffer.data()), static_cast<size_t>(bytes_read)};
REQUIRE(buffer_as_str == "monkey_1");
REQUIRE(kapi::filesystem::close(fd) == 0);
REQUIRE(kapi::filesystem::umount("/information") == 0);
}
THEN("device can be opened as file and read from")
{
auto fd = kapi::filesystem::open("/dev/ram0");
REQUIRE(fd >= 0);
auto buffer = std::vector<std::byte>(512);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read >= 0);
REQUIRE(kapi::filesystem::close(fd) == 0);
}
THEN("device can be opened as file and written to and read from again")
{
auto read_fd = kapi::filesystem::open("/dev/ram16");
REQUIRE(read_fd >= 0);
auto buffer = std::vector<std::byte>(512, std::byte{0xAB});
auto bytes_written = kapi::filesystem::write(read_fd, buffer.data(), buffer.size());
REQUIRE(bytes_written >= 0);
auto write_fd = kapi::filesystem::open("/dev/ram16");
REQUIRE(write_fd >= 0);
auto read_buffer = std::vector<std::byte>(512);
auto bytes_read = kapi::filesystem::read(write_fd, read_buffer.data(), read_buffer.size());
REQUIRE(bytes_read >= 0);
REQUIRE(std::equal(buffer.begin(), buffer.end(), read_buffer.begin()));
REQUIRE(kapi::filesystem::close(write_fd) == 0);
REQUIRE(kapi::filesystem::close(read_fd) == 0);
}
THEN("invalid paths cannot be mounted or unmounted")
{
REQUIRE(kapi::filesystem::mount("/dev/ram16", "invalid_path") < 0);
}
THEN("invalid paths cannot be unmounted")
{
REQUIRE(kapi::filesystem::umount("invalid_path") < 0);
}
THEN("non existent files cannot be opened")
{
auto fd = kapi::filesystem::open("/information/non_existent.txt");
REQUIRE(fd < 0);
}
THEN("not opened files cannot closed")
{
REQUIRE(kapi::filesystem::close(999) < 0);
}
THEN("not opened files cannot be read from")
{
std::vector<std::byte> buffer(10);
auto const invalid_fd = 999uz;
auto bytes_read = kapi::filesystem::read(invalid_fd, buffer.data(), buffer.size());
REQUIRE(bytes_read < 0);
}
THEN("not opened files cannot be written to")
{
std::vector<std::byte> buffer(10);
auto const invalid_fd = 999uz;
auto bytes_written = kapi::filesystem::write(invalid_fd, buffer.data(), buffer.size());
REQUIRE(bytes_written < 0);
}
}
}
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