[test] Add unit tests for ACP and ALRU cleaning policy parameters

- Add tests for wake-up and flush-max-buffers parameter validation
- Test parameter boundary values and error conditions
- Cover parameter parsing from configuration strings
- Verify set_param_cleaning_policy commands construction
- Test proper handling of different cleaning policies in configure_cache

These tests ensure the proper validation and handling of cleaning policy
parameters introduced in the previous commits.

utils/opencas.py

@@ -219,6 +219,9 @@ class cas_config(object):
         if not stat.S_ISBLK(mode):
             raise ValueError(f'{path} is not block device')
 
+    def __str__(self):
+        return f"cas_config(caches={[str(cache) for cache in self.caches.values()]}, cores={[str(core) for core in self.cores]}, version_tag={self.version_tag})"
+
     class cache_config(object):
         def __init__(self, cache_id, device, cache_mode, **params):
             self.cache_id = int(cache_id)
@@ -227,6 +230,9 @@ class cas_config(object):
             self.params = params
             self.cores = dict()
 
+        def __str__(self):
+            return f"cache_config(cache_id={self.cache_id}, device={self.device}, cache_mode={self.cache_mode}, params={self.params}, cores={self.cores})"
+
         @classmethod
         def from_line(cls, line, allow_incomplete=False):
             values = line.split()
@@ -387,6 +393,9 @@ class cas_config(object):
             self.device = path
             self.params = params
 
+        def __str__(self):
+            return f"core_config(cache_id={self.cache_id}, core_id={self.core_id}, device={self.device}, params={self.params})"
+
         @classmethod
         def from_line(cls, line, allow_incomplete=False):
             values = line.split()
@@ -646,12 +655,12 @@ def configure_cache(cache):
         )
 
 
-def add_core(core, attach):
+def add_core(core, try_add):
     casadm.add_core(
             device=core.device,
             cache_id=core.cache_id,
             core_id=core.core_id,
-            try_add=attach)
+            try_add=try_add)
 
 # Another helper functions