test: read_gbp works when table and column share a name (#1079)

Author: chelsea-lin

tests/system/small/test_session.py

@@ -403,6 +403,17 @@ def test_read_gbq_on_linked_dataset_warns(session, source_table):
         assert warned[0].category == bigframes.exceptions.TimeTravelDisabledWarning
 
 
+def test_read_gbq_w_ambigous_name(
+    session: bigframes.Session,
+):
+    # Ensure read_gbq works when table and column share a name
+    df = session.read_gbq(
+        "bigframes-dev.bigframes_tests_sys.ambiguous_name"
+    ).to_pandas()
+    pd_df = pd.DataFrame({"x": [2, 1], "ambiguous_name": [20, 10]})
+    pd.testing.assert_frame_equal(df, pd_df, check_dtype=False, check_index_type=False)
+
+
 def test_read_gbq_table_clustered_with_filter(session: bigframes.Session):
     df = session.read_gbq_table(
         "bigquery-public-data.cloud_storage_geo_index.landsat_index",