chore: import upstream snapshot with attribution

python/ray/dag/conftest.py

@@ -0,0 +1,17 @@
+import os
+
+import pytest
+
+import ray
+
+TEST_NAMESPACE = "ray_dag_test_namespace"
+
+
+@pytest.fixture(scope="session")
+def shared_ray_instance():
+    # Remove ray address for test ray cluster in case we have
+    # lingering RAY_ADDRESS="http://127.0.0.1:8265" from previous local job
+    # submissions.
+    if "RAY_ADDRESS" in os.environ:
+        del os.environ["RAY_ADDRESS"]
+    yield ray.init(num_cpus=16, namespace=TEST_NAMESPACE, log_to_driver=True)