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#include <kernel/filesystem/dentry.hpp>
#include <kernel/test_support/cpu.hpp>
#include <kernel/test_support/filesystem/inode.hpp>
#include <kstd/memory>
#include <kstd/print>
#include <catch2/catch_test_macros.hpp>
SCENARIO("Dentry construction", "[filesystem][dentry]")
{
GIVEN("A parent dentry and inode")
{
auto inode = kstd::make_shared<kernel::tests::filesystem::inode>();
auto parent_dentry = kstd::make_shared<kernel::filesystem::dentry>(nullptr, inode, "parent");
WHEN("constructing a dentry")
{
auto child_dentry = kernel::filesystem::dentry{parent_dentry, inode, "child"};
THEN("the dentry has the correct parent, inode, and name")
{
REQUIRE(child_dentry.parent() == parent_dentry);
REQUIRE(child_dentry.get_inode() == inode);
REQUIRE(child_dentry.name() == "child");
}
THEN("no flag is set")
{
REQUIRE_FALSE(child_dentry.has_flag(kernel::filesystem::dentry::dentry_flags::is_mount_point));
}
}
WHEN("constructing a dentry with an empty name")
{
THEN("the dentry has the correct parent and inode, and an empty name")
{
REQUIRE_THROWS_AS((kernel::filesystem::dentry{parent_dentry, inode, ""}), kernel::tests::cpu::halt);
}
}
WHEN("constructing a dentry with a null parent")
{
auto child_dentry = kernel::filesystem::dentry{nullptr, inode, "child"};
THEN("the dentry has a null parent, the correct inode, and the correct name")
{
REQUIRE(child_dentry.parent() == nullptr);
REQUIRE(child_dentry.get_inode() == inode);
REQUIRE(child_dentry.name() == "child");
}
THEN("no flag is set")
{
REQUIRE_FALSE(child_dentry.has_flag(kernel::filesystem::dentry::dentry_flags::is_mount_point));
}
}
WHEN("constructing a dentry with a null inode")
{
THEN("the system panics")
{
REQUIRE_THROWS_AS((kernel::filesystem::dentry{parent_dentry, nullptr, "child"}), kernel::tests::cpu::halt);
}
}
}
}
SCENARIO("Dentry child logic", "[filesystem][dentry]")
{
GIVEN("A parent dentry and inode")
{
auto inode = kstd::make_shared<kernel::tests::filesystem::inode>();
auto parent_dentry = kstd::make_shared<kernel::filesystem::dentry>(nullptr, inode, "parent");
WHEN("adding child dentries")
{
auto child1 = kstd::make_shared<kernel::filesystem::dentry>(parent_dentry, inode, "child1");
auto child2 = kstd::make_shared<kernel::filesystem::dentry>(parent_dentry, inode, "child2");
parent_dentry->add_child(child1);
parent_dentry->add_child(child2);
THEN("the children can be found by name")
{
REQUIRE(parent_dentry->find_child("child1") == child1);
REQUIRE(parent_dentry->find_child("child2") == child2);
}
THEN("finding a non-existent child returns null")
{
REQUIRE(parent_dentry->find_child("nonexistent") == nullptr);
}
}
}
}
SCENARIO("Dentry Flag logic", "[filesystem][dentry]")
{
GIVEN("A dentry")
{
auto inode = kstd::make_shared<kernel::tests::filesystem::inode>();
auto dentry = kernel::filesystem::dentry{nullptr, inode, "test"};
WHEN("setting a flag")
{
dentry.set_flag(kernel::filesystem::dentry::dentry_flags::is_mount_point);
THEN("the flag is set")
{
REQUIRE(dentry.has_flag(kernel::filesystem::dentry::dentry_flags::is_mount_point));
}
}
WHEN("unsetting a flag")
{
dentry.set_flag(kernel::filesystem::dentry::dentry_flags::is_mount_point);
dentry.unset_flag(kernel::filesystem::dentry::dentry_flags::is_mount_point);
THEN("the flag is unset")
{
REQUIRE_FALSE(dentry.has_flag(kernel::filesystem::dentry::dentry_flags::is_mount_point));
}
}
}
}
SCENARIO("Dentry path resolution", "[filesystem][dentry]")
{
GIVEN("A dentry with a parent hierarchy")
{
auto root_inode = kstd::make_shared<kernel::tests::filesystem::inode>();
auto root_dentry = kstd::make_shared<kernel::filesystem::dentry>(nullptr, root_inode, "/");
auto home_inode = kstd::make_shared<kernel::tests::filesystem::inode>();
auto home_dentry = kstd::make_shared<kernel::filesystem::dentry>(root_dentry, home_inode, "home");
root_dentry->add_child(home_dentry);
auto user_inode = kstd::make_shared<kernel::tests::filesystem::inode>();
auto user_dentry = kstd::make_shared<kernel::filesystem::dentry>(home_dentry, user_inode, "user");
home_dentry->add_child(user_dentry);
THEN("the full path is constructed correctly")
{
REQUIRE(root_dentry->absolute_path() == "/");
REQUIRE(home_dentry->absolute_path() == "/home");
REQUIRE(user_dentry->absolute_path() == "/home/user");
}
}
}
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