add vfs symlink tests

1 files changed, 62 insertions, 1 deletions

diff --git a/kernel/src/filesystem/vfs.tests.cpp b/kernel/src/filesystem/vfs.tests.cpp
index 5160d15..2eec572 100644
--- a/kernel/src/filesystem/vfs.tests.cpp
+++ b/kernel/src/filesystem/vfs.tests.cpp
@@ -283,7 +283,7 @@ SCENARIO_METHOD(kernel::tests::filesystem::storage_boot_module_vfs_fixture, "VFS
     }
   }
 
-  GIVEN("one real image files, containing symbolic links")
+  GIVEN("A real image files, containing symbolic links")
   {
     REQUIRE(std::filesystem::exists(image_path_1));
     REQUIRE_NOTHROW(setup_modules_from_img_and_init_vfs({"test_img_module_1"}, {image_path_1}));
@@ -344,4 +344,65 @@ SCENARIO_METHOD(kernel::tests::filesystem::storage_boot_module_vfs_fixture, "VFS
       REQUIRE(circular_symlink == nullptr);
     }
   }
+
+  GIVEN("A real image file containing as filesystem formatted files and this filesystem contains a symbolic link")
+  {
+    REQUIRE(std::filesystem::exists(image_path_1));
+    REQUIRE_NOTHROW(setup_modules_from_img_and_init_vfs({"test_img_module_1"}, {image_path_1}));
+
+    auto & vfs = kernel::filesystem::vfs::get();
+    vfs.do_mount("/archiv/2024.img", "/information");
+
+    THEN("file can be opened through symbolic link pointing to the parent filesystem")
+    {
+      auto closed_file = vfs.open("/information/symlinks/traverse_back_twice/closed.txt");
+      REQUIRE(closed_file != nullptr);
+    }
+  }
+
+  GIVEN("Two real images, one containing a symbolic link leaving and reentering filesystem again")
+  {
+    REQUIRE(std::filesystem::exists(image_path_1));
+    REQUIRE(std::filesystem::exists(image_path_2));
+    REQUIRE_NOTHROW(
+        setup_modules_from_img_and_init_vfs({"test_img_module_1", "test_img_module_2"}, {image_path_1, image_path_2}));
+
+    auto & vfs = kernel::filesystem::vfs::get();
+    vfs.do_mount("/dev/ram16", "/information");
+
+    THEN("file can be opened through symbolic link pointing to the parent filesystem and back into the mounted "
+         "filesystem again")
+    {
+      auto monkey_1 = vfs.open("/information/symlinks/leave_and_reenter_mount/monkey_1.txt");
+      REQUIRE(monkey_1 != nullptr);
+    }
+  }
+
+  GIVEN("One real image containing a very long symbolic link")
+  {
+    REQUIRE(std::filesystem::exists(image_path_3));
+    REQUIRE_NOTHROW(setup_modules_from_img_and_init_vfs({"test_img_module_3"}, {image_path_3}));
+
+    auto & vfs = kernel::filesystem::vfs::get();
+
+    THEN("file can be opened through symbolic link with a long path")
+    {
+      auto fish_30 = vfs.open("/symlinks/very_long_symlink");
+      REQUIRE(fish_30 != nullptr);
+    }
+  }
+
+  GIVEN("One real image containing a valid symbolic link chain")
+  {
+    REQUIRE(std::filesystem::exists(image_path_3));
+    REQUIRE_NOTHROW(setup_modules_from_img_and_init_vfs({"test_img_module_3"}, {image_path_3}));
+
+    auto & vfs = kernel::filesystem::vfs::get();
+
+    THEN("file can be opened through symbolic link chain")
+    {
+      auto map = vfs.open("/symlinks/symlink_chain_1/map.txt");
+      REQUIRE(map != nullptr);
+    }
+  }
 }