chore: add system tests

Author: tswast

tests/system/large/bigquery/__init__.py

@@ -0,0 +1,13 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.

tests/system/large/bigquery/test_obj.py

@@ -0,0 +1,41 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import pytest
+
+import bigframes.bigquery as bbq
+
+
+@pytest.fixture()
+def objectrefs(bq_connection):
+    return bbq.obj.make_ref(
+        [
+            "gs://cloud-samples-data/bigquery/tutorials/cymbal-pets/images/tick-terminator-for-dogs.png"
+        ],
+        bq_connection,
+    )
+
+
+def test_obj_fetch_metadata(objectrefs):
+    metadata = bbq.obj.fetch_metadata(objectrefs)
+
+    result = metadata.to_pandas()
+    assert len(result) == len(objectrefs)
+
+
+def test_obj_get_access_url(objectrefs):
+    access = bbq.obj.get_access_url(objectrefs, "r")
+
+    result = access.to_pandas()
+    assert len(result) == len(objectrefs)