lib: replace list with tuple for returned version

Co-authored-by: Alexander Turenko <alexander.turenko@tarantool.org>

Author: ligurio

lib/tarantool_server.py

@@ -912,8 +912,8 @@ def start(self, silent=True, wait=True, wait_load=True, rais=True, args=[],
         # Verify that the schema actually was not upgraded.
         if self.disable_schema_upgrade:
             expected_version = extract_schema_from_snapshot(self.snapshot_path)
-            actual_version = yaml.safe_load(self.admin.execute(
-                'box.space._schema:get{"version"}'))[0]
+            actual_version = tuple(yaml.safe_load(self.admin.execute(
+                'box.space._schema:get{"version"}'))[0][1:])
             if expected_version != actual_version:
                 color_stdout('Schema version check fails: expected '
                              '{}, got {}\n'.format(expected_version,

lib/utils.py

@@ -303,15 +303,15 @@ def extract_schema_from_snapshot(snapshot_path):
        "BODY": {"space_id": 272, "tuple": ["version", 2, 3, 1]}
      }
 
-    :returns: [u'version', 2, 3, 1]
+    :returns: (2, 3, 1)
     """
     BOX_SCHEMA_ID = 272
     for row in xlog_rows(snapshot_path):
         if row['HEADER']['type'] == 'INSERT' and \
            row['BODY']['space_id'] == BOX_SCHEMA_ID:
             res = row['BODY']['tuple']
             if res[0] == 'version':
-                return res
+                return tuple(res[1:])
     return None