From eaee2798c45ea21e2d7f1b33b19c544b1083ee5a Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Fri, 24 Jul 2026 08:49:50 +0200
Subject: kernel: fix device inode tests

---
 kernel/kernel/filesystem/device_inode.tests.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/kernel/kernel/filesystem/device_inode.tests.cpp b/kernel/kernel/filesystem/device_inode.tests.cpp
index 09979030..aa97f8ca 100644
--- a/kernel/kernel/filesystem/device_inode.tests.cpp
+++ b/kernel/kernel/filesystem/device_inode.tests.cpp
@@ -21,6 +21,7 @@
 
 #include <cstddef>
 #include <cstdint>
+#include <optional>
 #include <utility>
 
 using namespace kstd::units_literals;
@@ -35,6 +36,21 @@ namespace
     }
   };
 
+  struct test_driver final : kapi::devices::driver
+  {
+    [[nodiscard]] auto probe(kapi::devices::device &) -> kstd::result<void> override
+    {
+      return kstd::success();
+    }
+
+    auto unbind(kapi::devices::device &) -> void override {}
+
+    [[nodiscard]] auto claimed_major() const -> std::optional<std::uint8_t> override
+    {
+      return std::uint8_t{1};
+    }
+  };
+
   struct mock_origin_inode : kernel::filesystem::inode
   {
     auto read(void *, kstd::units::bytes, kstd::units::bytes) const -> kstd::result<kstd::units::bytes> override
@@ -168,6 +184,10 @@ SCENARIO("Device inode raw_device()", "[filesystem][device-inode]")
   GIVEN("A block device that has been published and numbered")
   {
     auto device = kstd::make_shared<kernel::tests::devices::block_device>("ram0", 512_B);
+    auto driver = kstd::make_shared<test_driver>();
+    device->bind_driver(driver);
+    device->set_state(kapi::devices::state::bound);
+
     REQUIRE(kapi::devices::interface_registry::get().publish<kapi::devices::block_device>(device, "ram0"));
 
     auto inode = kernel::filesystem::device_inode{device};
-- 
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