fix: enable unit tests to run when Docker subsystem is not present

libs/redis/tests/conftest.py

@@ -1,4 +1,5 @@
 import os
+import subprocess
 
 import pytest
 
@@ -16,18 +17,21 @@ def redis_container() -> DockerCompose:
         # Set the default Redis version if not already set
         os.environ.setdefault("REDIS_VERSION", "edge")
 
-        compose = DockerCompose(
-            "tests", compose_file_name="docker-compose.yml", pull=True
-        )
-        compose.start()
+        try:
+            compose = DockerCompose(
+                "tests", compose_file_name="docker-compose.yml", pull=True
+            )
+            compose.start()
 
-        redis_host, redis_port = compose.get_service_host_and_port("redis", 6379)
-        redis_url = f"redis://{redis_host}:{redis_port}"
-        os.environ["REDIS_URL"] = redis_url
+            redis_host, redis_port = compose.get_service_host_and_port("redis", 6379)
+            redis_url = f"redis://{redis_host}:{redis_port}"
+            os.environ["REDIS_URL"] = redis_url
 
-        yield compose
+            yield compose
 
-        compose.stop()
+            compose.stop()
+        except subprocess.CalledProcessError:
+            yield None
 
 
 @pytest.fixture(scope="session")