chore: import upstream snapshot with attribution

rllib/algorithms/tests/test_ray_client.py

@@ -0,0 +1,27 @@
+import sys
+
+import pytest
+
+from ray._private.client_mode_hook import client_mode_should_convert, enable_client_mode
+from ray.rllib.algorithms import dqn
+from ray.util.client.ray_client_helpers import ray_start_client_server
+
+
+def test_basic_dqn():
+    with ray_start_client_server():
+        # Need to enable this for client APIs to be used.
+        with enable_client_mode():
+            # Confirming mode hook is enabled.
+            assert client_mode_should_convert()
+            config = (
+                dqn.DQNConfig()
+                .environment("CartPole-v1")
+                .env_runners(num_env_runners=0, compress_observations=True)
+            )
+            trainer = config.build()
+            for i in range(2):
+                trainer.train()
+
+
+if __name__ == "__main__":
+    sys.exit(pytest.main(["-v", "-s", __file__]))