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Diffstat (limited to 'kernel/src/filesystem/mount.tests.cpp')
| -rw-r--r-- | kernel/src/filesystem/mount.tests.cpp | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/kernel/src/filesystem/mount.tests.cpp b/kernel/src/filesystem/mount.tests.cpp new file mode 100644 index 0000000..c9ff82e --- /dev/null +++ b/kernel/src/filesystem/mount.tests.cpp @@ -0,0 +1,94 @@ +#include <kernel/filesystem/mount.hpp> + +#include <kernel/filesystem/dentry.hpp> +#include <kernel/test_support/cpu.hpp> +#include <kernel/test_support/filesystem/filesystem.hpp> +#include <kernel/test_support/filesystem/inode.hpp> + +#include <kstd/memory> +#include <kstd/print> +#include <kstd/vector> + +#include <catch2/catch_test_macros.hpp> + +#include <stdexcept> + +SCENARIO("Mount construction", "[filesystem][mount]") +{ + GIVEN("a filesystem and a root dentry") + { + auto fs = kstd::make_shared<kernel::tests::filesystem::filesystem>(); + auto root_inode = kstd::make_shared<kernel::tests::filesystem::inode>(); + auto root_dentry = kstd::make_shared<kernel::filesystem::dentry>(nullptr, root_inode, "/"); + + WHEN("constructing a mount with the filesystem and root dentry") + { + auto mount = kernel::filesystem::mount{root_dentry, root_dentry, fs, nullptr, nullptr}; + + THEN("the mount has the correct filesystem, root dentry, mount dentry, and mount path") + { + REQUIRE(mount.get_filesystem() == fs); + REQUIRE(mount.root_dentry() == root_dentry); + REQUIRE(mount.mount_dentry() == root_dentry); + REQUIRE(mount.mount_path() == "/"); + REQUIRE(mount.is_ready_to_unmount()); + } + + THEN("the mount has no parent mount and no source mount") + { + REQUIRE(mount.parent_mount() == nullptr); + REQUIRE(mount.source_mount() == nullptr); + } + } + + WHEN("constructing a mount with a null filesystem") + { + THEN("the constructor panics") + { + REQUIRE_THROWS_AS((kernel::filesystem::mount{root_dentry, root_dentry, nullptr, nullptr, nullptr}), + kernel::tests::cpu::halt); + } + } + } +} + +SCENARIO("Mount reference counting", "[filesystem][mount]") +{ + GIVEN("a filesystem and a root dentry") + { + auto fs = kstd::make_shared<kernel::tests::filesystem::filesystem>(); + auto root_inode = kstd::make_shared<kernel::tests::filesystem::inode>(); + auto root_dentry = kstd::make_shared<kernel::filesystem::dentry>(nullptr, root_inode, "/"); + + THEN("reference count can be incremented and decremented, the mount is ready to unmount when the reference " + "count == 0") + { + auto mount = kernel::filesystem::mount{root_dentry, root_dentry, fs, nullptr, nullptr}; + + mount.increment_ref_count(); + REQUIRE(mount.ref_count() == 1); + REQUIRE_FALSE(mount.is_ready_to_unmount()); + + mount.increment_ref_count(); + REQUIRE(mount.ref_count() == 2); + REQUIRE_FALSE(mount.is_ready_to_unmount()); + + mount.decrement_ref_count(); + REQUIRE(mount.ref_count() == 1); + REQUIRE_FALSE(mount.is_ready_to_unmount()); + + mount.decrement_ref_count(); + REQUIRE(mount.ref_count() == 0); + REQUIRE(mount.is_ready_to_unmount()); + } + + THEN("decrementing reference count when it is already zero does not decrement it below zero") + { + auto mount = kernel::filesystem::mount{root_dentry, root_dentry, fs, nullptr, nullptr}; + + REQUIRE_THROWS_AS(mount.decrement_ref_count(), std::runtime_error); + REQUIRE(mount.ref_count() == 0); + REQUIRE(mount.is_ready_to_unmount()); + } + } +}
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