From e0854bc0aad9e59d67fbf300cb223b116b127ffc Mon Sep 17 00:00:00 2001
From: Lukas Oesch <lukasoesch20@gmail.com>
Date: Sun, 26 Apr 2026 12:36:26 +0200
Subject: rename file_descriptor_table to open_file_table

---
 kernel/src/filesystem/open_file_table.tests.cpp | 113 ++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 kernel/src/filesystem/open_file_table.tests.cpp

(limited to 'kernel/src/filesystem/open_file_table.tests.cpp')

diff --git a/kernel/src/filesystem/open_file_table.tests.cpp b/kernel/src/filesystem/open_file_table.tests.cpp
new file mode 100644
index 0000000..a5c791d
--- /dev/null
+++ b/kernel/src/filesystem/open_file_table.tests.cpp
@@ -0,0 +1,113 @@
+#include <kernel/filesystem/open_file_table.hpp>
+
+#include <kernel/filesystem/open_file_descriptor.hpp>
+#include <kernel/test_support/filesystem/inode.hpp>
+
+#include <kstd/memory>
+#include <kstd/print>
+#include <kstd/vector>
+
+#include <catch2/catch_test_macros.hpp>
+
+SCENARIO("Open file table add/get file", "[filesystem][open_file_table]")
+{
+  GIVEN("a open file table and an open file descriptor")
+  {
+    auto & table = kernel::filesystem::open_file_table::get();
+    auto inode = kstd::make_shared<kernel::tests::filesystem::inode>();
+    auto file_descriptor_1 = kstd::make_shared<kernel::filesystem::open_file_descriptor>(inode);
+    auto file_descriptor_2 = kstd::make_shared<kernel::filesystem::open_file_descriptor>(inode);
+
+    WHEN("adding the open file descriptor to the open file table")
+    {
+      auto fd_1 = table.add_file(file_descriptor_1);
+      auto fd_2 = table.add_file(file_descriptor_2);
+      auto fd_3 = table.add_file(file_descriptor_2);
+
+      THEN("a valid file descriptor is returned")
+      {
+        REQUIRE(fd_1 == 0);
+        REQUIRE(fd_2 == 1);
+        REQUIRE(fd_3 == 2);
+      }
+
+      THEN("the file descriptor can be retrieved using the returned file descriptor")
+      {
+        auto retrieved_descriptor = table.get_file(fd_1);
+        REQUIRE(retrieved_descriptor == file_descriptor_1);
+      }
+    }
+  }
+
+  GIVEN("a invalid open file descriptor")
+  {
+    auto & table = kernel::filesystem::open_file_table::get();
+
+    THEN("adding a null file descriptor returns an error code")
+    {
+      auto fd = table.add_file(nullptr);
+      REQUIRE(fd == -1);
+    }
+
+    THEN("retrieving a file descriptor with a negative file descriptor returns a null pointer")
+    {
+      auto retrieved_descriptor = table.get_file(-1);
+      REQUIRE(retrieved_descriptor == nullptr);
+    }
+
+    THEN("retrieving a file descriptor with an out-of-bounds file descriptor returns a null pointer")
+    {
+      auto retrieved_descriptor = table.get_file(1000);
+      REQUIRE(retrieved_descriptor == nullptr);
+    }
+  }
+}
+
+SCENARIO("Open file table remove file", "[filesystem][open_file_table]")
+{
+  GIVEN("a open file table with an open file descriptor")
+  {
+    auto & table = kernel::filesystem::open_file_table::get();
+    auto inode = kstd::make_shared<kernel::tests::filesystem::inode>();
+    auto file_descriptor = kstd::make_shared<kernel::filesystem::open_file_descriptor>(inode);
+    auto fd = table.add_file(file_descriptor);
+
+    WHEN("removing the file descriptor using the file descriptor")
+    {
+      table.remove_file(fd);
+
+      THEN("the file descriptor can no longer be retrieved using the file descriptor")
+      {
+        auto retrieved_descriptor = table.get_file(fd);
+        REQUIRE(retrieved_descriptor == nullptr);
+      }
+    }
+
+    WHEN("removing a file descriptor the other file descriptor keep the same index")
+    {
+      auto fd2 = table.add_file(file_descriptor);
+      table.remove_file(fd);
+
+      THEN("the second file descriptor can still be retrieved using its file descriptor")
+      {
+        auto retrieved_descriptor = table.get_file(fd2);
+        REQUIRE(retrieved_descriptor == file_descriptor);
+      }
+    }
+  }
+
+  GIVEN("an invalid file descriptor")
+  {
+    auto & table = kernel::filesystem::open_file_table::get();
+
+    THEN("removing a file with a negative file descriptor does nothing")
+    {
+      REQUIRE_NOTHROW(table.remove_file(-1));
+    }
+
+    THEN("removing a file with an out-of-bounds file descriptor does nothing")
+    {
+      REQUIRE_NOTHROW(table.remove_file(1000));
+    }
+  }
+}
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