add no client case

tests/tape_tests/test_ensemble.py

@@ -832,12 +832,19 @@ def test_persist(dask_client):
     assert new_graph_size < old_graph_size
 
 
-def test_sample_objects(parquet_ensemble_with_divisions):
+@pytest.mark.parametrize(
+    "data_fixture",
+    [
+        "parquet_ensemble_with_divisions",
+        "parquet_ensemble_without_client",
+    ],
+)
+def test_sample_objects(data_fixture, request):
     """
     Test Ensemble.sample_objects
     """
 
-    ens = parquet_ensemble_with_divisions
+    ens = request.getfixturevalue(data_fixture)
     ens.source.repartition(npartitions=10).update_ensemble()
     ens.object.repartition(npartitions=5).update_ensemble()
 
@@ -853,7 +860,8 @@ def test_sample_objects(parquet_ensemble_with_divisions):
     assert len(ens.object) == prior_obj_len
     assert len(ens.source) == prior_src_len
 
-    ens.client.close()
+    if data_fixture == "parquet_ensemble_with_divisions":
+        ens.client.close()
 
 
 def test_update_column_map(dask_client):