tests: fs: lib_link: added

Add a test validating that Zephyr can compile with the 3 underlying
filesystems enabled with only `CONFIG_FILE_SYSTEM_LIB_LINK` enabled.

Signed-off-by: Jordan Yates <[email protected]>

Author: JordanYates

tests/subsys/fs/lib_link/CMakeLists.txt

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(fs_lib_link)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

tests/subsys/fs/lib_link/prj.conf

@@ -0,0 +1,5 @@
+CONFIG_FILE_SYSTEM_LIB_LINK=y
+CONFIG_FAT_FILESYSTEM_ELM=y
+CONFIG_FILE_SYSTEM_LITTLEFS=y
+CONFIG_FILE_SYSTEM_EXT2=y
+CONFIG_ZTEST=y

tests/subsys/fs/lib_link/src/main.c

@@ -0,0 +1,10 @@
+/*
+ * Copyright (c) 2025 Embeint Inc
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <string.h>
+#include <zephyr/ztest.h>
+
+ZTEST_SUITE(lib_link, NULL, NULL, NULL, NULL, NULL);

tests/subsys/fs/lib_link/testcase.yaml

@@ -0,0 +1,5 @@
+tests:
+  filesystem.lib_link:
+    tags: filesystem
+    integration_platforms:
+      - native_sim