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#include "kernel/filesystem/file_descriptor_table.hpp"
#include "kernel/filesystem/open_file_description.hpp"
#include "kernel/test_support/filesystem/inode.hpp"
#include <kstd/memory>
#include <kstd/print>
#include <kstd/vector>
#include <catch2/catch_test_macros.hpp>
SCENARIO("File descriptor table add/get file", "[filesystem][file_descriptor_table]")
{
GIVEN("a file descriptor table and an open file description")
{
auto & table = kernel::filesystem::file_descriptor_table::get();
auto inode = kstd::make_shared<kernel::tests::filesystem::inode>();
auto file_description_1 = kstd::make_shared<kernel::filesystem::open_file_description>(inode);
auto file_description_2 = kstd::make_shared<kernel::filesystem::open_file_description>(inode);
WHEN("adding the open file description to the file descriptor table")
{
auto fd_1 = table.add_file(file_description_1);
auto fd_2 = table.add_file(file_description_2);
auto fd_3 = table.add_file(file_description_2);
THEN("a valid file descriptor is returned")
{
REQUIRE(fd_1 == 0);
REQUIRE(fd_2 == 1);
REQUIRE(fd_3 == 2);
}
THEN("the file description can be retrieved using the returned file descriptor")
{
auto retrieved_description = table.get_file(fd_1);
REQUIRE(retrieved_description == file_description_1);
}
}
}
GIVEN("a invalid open file description")
{
auto & table = kernel::filesystem::file_descriptor_table::get();
THEN("adding a null file description returns an error code")
{
auto fd = table.add_file(nullptr);
REQUIRE(fd == -1);
}
THEN("retrieving a file description with a negative file descriptor returns a null pointer")
{
auto retrieved_description = table.get_file(-1);
REQUIRE(retrieved_description == nullptr);
}
THEN("retrieving a file description with an out-of-bounds file descriptor returns a null pointer")
{
auto retrieved_description = table.get_file(1000);
REQUIRE(retrieved_description == nullptr);
}
}
}
SCENARIO("File descriptor table remove file", "[filesystem][file_descriptor_table]")
{
GIVEN("a file descriptor table with an open file description")
{
auto & table = kernel::filesystem::file_descriptor_table::get();
auto inode = kstd::make_shared<kernel::tests::filesystem::inode>();
auto file_description = kstd::make_shared<kernel::filesystem::open_file_description>(inode);
auto fd = table.add_file(file_description);
WHEN("removing the file description using the file descriptor")
{
table.remove_file(fd);
THEN("the file description can no longer be retrieved using the file descriptor")
{
auto retrieved_description = table.get_file(fd);
REQUIRE(retrieved_description == nullptr);
}
}
WHEN("removing a file description the other file descriptor keep the same index")
{
auto fd2 = table.add_file(file_description);
table.remove_file(fd);
THEN("the second file description can still be retrieved using its file descriptor")
{
auto retrieved_description = table.get_file(fd2);
REQUIRE(retrieved_description == file_description);
}
}
}
GIVEN("an invalid file descriptor")
{
auto & table = kernel::filesystem::file_descriptor_table::get();
THEN("removing a file with a negative file descriptor does nothing")
{
REQUIRE_NOTHROW(table.remove_file(-1));
}
THEN("removing a file with an out-of-bounds file descriptor does nothing")
{
REQUIRE_NOTHROW(table.remove_file(1000));
}
}
}
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