add test for devfs edge case

1 files changed, 9 insertions, 0 deletions

diff --git a/kernel/src/filesystem/devfs/filesystem.tests.cpp b/kernel/src/filesystem/devfs/filesystem.tests.cpp
index 1d82bf9..f8c4764 100644
--- a/kernel/src/filesystem/devfs/filesystem.tests.cpp
+++ b/kernel/src/filesystem/devfs/filesystem.tests.cpp
@@ -34,6 +34,15 @@ SCENARIO_METHOD(kernel::tests::filesystem::storage_boot_module_fixture,
       REQUIRE(inode == nullptr);
     }
 
+    THEN("lookup with wrong parent returns null")
+    {
+      auto other_fs = kernel::filesystem::devfs::filesystem{};
+      other_fs.mount(nullptr);
+
+      auto inode = fs.lookup(other_fs.root_inode(), "ram0");
+      REQUIRE(inode == nullptr);
+    }
+
     THEN("lookup with a non-directory parent returns null")
     {
       auto non_directory_inode = fs.lookup(fs.root_inode(), "ram0");