MS example test skip if no Redis

tests/examples/test_memory_storage.py

@@ -1,6 +1,8 @@
 import os
 import re
 
+import redis
+import unittest
 from testbook import testbook
 from testbook.client import TestbookNotebookClient
 
@@ -10,9 +12,16 @@
     examples_path = get_examples_path()
 
 else:
-
     examples_path = "examples"
 
+client = redis.Redis(decode_responses=True)
+try:
+    client.ping()
+    redis_reachable = True
+except Exception:
+    redis_reachable = False
+
+@unittest.skipIf(not redis_reachable, "Redis server not running")
 @testbook(os.path.join(examples_path, "Memory Storage.ipynb"), execute=True)
 def test_gym_integration(tb :TestbookNotebookClient):