test api: utility to extract info about CAS md

Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>

test/functional/api/cas/dmesg.py

@@ -0,0 +1,39 @@
+#
+# Copyright(c) 2019-2022 Intel Corporation
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+import re
+
+from test_utils.size import Size, Unit
+
+
+def get_metadata_size(dmesg):
+    for s in dmesg.split("\n"):
+        if "Metadata capacity:" in s:
+            size = re.search("[0-9]* MiB", s).group()
+            return Size(int(re.search("[0-9]*", size).group()), Unit.MebiByte)
+
+    raise ValueError("Can't find the metadata size in the privded dmesg output")
+
+
+def _get_metadata_info(dmesg, section_name):
+    for s in dmesg.split("\n"):
+        if section_name in s:
+            size, unit = re.search("[0-9]* (B|kiB)", s).group().split()
+            unit = Unit.KibiByte if unit == "kiB" else Unit.Byte
+            return Size(int(re.search("[0-9]*", size).group()), unit)
+
+    raise ValueError(f'"{section_name}" entry doesn\'t exist in the given dmesg output')
+
+
+def get_md_section_size(section_name, dmesg):
+    section_name = section_name.strip()
+    section_name += " size"
+    return _get_metadata_info(dmesg, section_name)
+
+
+def get_md_section_offset(section_name, dmesg):
+    section_name = section_name.strip()
+    section_name += " offset"
+    return _get_metadata_info(dmesg, section_name)