kernel/vfs: add type registry tests

1 files changed, 7 insertions, 1 deletions

diff --git a/kernel/include/kernel/filesystem/type_registry.hpp b/kernel/include/kernel/filesystem/type_registry.hpp
index 2f5e708..3be7295 100644
--- a/kernel/include/kernel/filesystem/type_registry.hpp
+++ b/kernel/include/kernel/filesystem/type_registry.hpp
@@ -7,6 +7,7 @@
 #include <kstd/memory>
 #include <kstd/string>
 
+#include <cstddef>
 #include <span>
 #include <string_view>
 
@@ -35,7 +36,12 @@ namespace kernel::filesystem
     //! Get all currently registered type descriptors.
     //!
     //! @return A span containing all currently registered filesystem type descriptors.
-    [[nodiscard]] auto all() const noexcept -> std::span<pointer>;
+    [[nodiscard]] auto all() const noexcept -> std::span<pointer const>;
+
+    //! Get the number of registered filesystem types.
+    //!
+    //! @return The number of filesystem descriptors currently registered with this registry.
+    [[nodiscard]] auto size() const noexcept -> std::size_t;
 
   private:
     //! A map from filesystem names (identifiers) to filesystem type descriptors.