Introduce tests for cache attach/detach feature

Signed-off-by: Katarzyna Treder <katarzyna.treder@h-partners.com>

test/functional/api/cas/cache_config.py

@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2019-2022 Intel Corporation
-# Copyright(c) 2024 Huawei Technologies Co., Ltd.
+# Copyright(c) 2024-2025 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -125,6 +125,7 @@ class CacheStatus(Enum):
     incomplete = "incomplete"
     standby = "standby"
     standby_detached = "standby detached"
+    detached = "detached"
 
     def __str__(self):
         return self.value

test/functional/api/cas/cli_messages.py

@@ -9,6 +9,20 @@ import re
 from connection.utils.output import Output
 from core.test_run import TestRun
 
+
+attach_not_enough_memory = [
+    r"Not enough free RAM\.\nYou need at least \d+.\d+GB to attach a device to cache "
+    r"with cache line size equal \d+kB.\n"
+    r"Try with greater cache line size\."
+]
+
+attach_with_existing_metadata = [
+    r"Error inserting cache \d+",
+    r"Old metadata found on device",
+    r"Please attach another device or use --force to discard on-disk metadata",
+    r" and attach this device to cache instance\."
+]
+
 load_inactive_core_missing = [
     r"WARNING: Can not resolve path to core \d+ from cache \d+\. By-id path will be shown for that "
     r"core\.",