From 9ce8ed3dd3aa5f6e21b53d02bac4f62eb8b3f337 Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Wed, 8 Apr 2026 23:04:40 +0200
Subject: add rootfs filesystem tests

---
 kernel/CMakeLists.txt                             |  1 +
 kernel/src/filesystem/rootfs/filesystem.tests.cpp | 45 +++++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 kernel/src/filesystem/rootfs/filesystem.tests.cpp

diff --git a/kernel/CMakeLists.txt b/kernel/CMakeLists.txt
index e3a357b..1cbb9e4 100644
--- a/kernel/CMakeLists.txt
+++ b/kernel/CMakeLists.txt
@@ -132,6 +132,7 @@ else()
 
         # Filesystem Subsystem Tests
         "src/filesystem/devfs/inode.tests.cpp"
+        "src/filesystem/rootfs/filesystem.tests.cpp"
         "src/filesystem/rootfs/inode.tests.cpp"
         "src/filesystem/dentry.tests.cpp"
         "src/filesystem/device_inode.tests.cpp"
diff --git a/kernel/src/filesystem/rootfs/filesystem.tests.cpp b/kernel/src/filesystem/rootfs/filesystem.tests.cpp
new file mode 100644
index 0000000..b013f78
--- /dev/null
+++ b/kernel/src/filesystem/rootfs/filesystem.tests.cpp
@@ -0,0 +1,45 @@
+#include "kernel/filesystem/rootfs/filesystem.hpp"
+
+#include "kernel/filesystem/filesystem.hpp"
+
+#include <kstd/memory>
+#include <kstd/print>
+#include <kstd/vector>
+
+#include <catch2/catch_test_macros.hpp>
+
+SCENARIO("Rootfs filesystem mount and lookup", "[filesystem][rootfs][filesystem]")
+{
+  GIVEN("a mounted rootfs filesystem")
+  {
+    auto fs = kernel::filesystem::rootfs::filesystem{};
+    auto result = fs.mount(nullptr);
+
+    THEN("the filesystem can be mounted successfully")
+    {
+      REQUIRE(result == kernel::filesystem::filesystem::operation_result::success);
+      REQUIRE(fs.root_inode() != nullptr);
+    }
+
+    THEN("looking up the 'dev' directory returns a valid inode")
+    {
+      auto dev_inode = fs.lookup(fs.root_inode(), "dev");
+      REQUIRE(dev_inode != nullptr);
+      REQUIRE(dev_inode->is_directory());
+    }
+
+    THEN("looking up a non-existent directory returns null")
+    {
+      auto non_existent_inode_1 = fs.lookup(fs.root_inode(), "");
+      REQUIRE(non_existent_inode_1 == nullptr);
+      auto non_existent_inode_2 = fs.lookup(fs.root_inode(), "nonexistent");
+      REQUIRE(non_existent_inode_2 == nullptr);
+    }
+
+    THEN("looking up with a null parent inode returns null")
+    {
+      auto result = fs.lookup(nullptr, "dev");
+      REQUIRE(result == nullptr);
+    }
+  }
+}
-- 
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