debug unit-test failures

Author: johnkerl

apis/python/tests/test_soma_dataframe.py

@@ -179,6 +179,23 @@ def _check_tbl(tbl, col_names, ids):
             len(schema.names) if col_names is None else len(col_names)
         )
         assert tbl.num_rows == (n_data if ids is None else len(ids))
+        print("")
+        print("COL_NAMES", col_names)
+        r = tbl.schema
+        i = pa.schema(
+            [
+                schema.field(f)
+                for f in (col_names if col_names is not None else schema.names)
+            ]
+        )
+        print("READBACK SCHEMA", type(tbl))
+        print(r)
+        print("INPUT SCHEMA")
+        print(i)
+        print("CMP", r==i)
+
+        print("")
+
         assert tbl.schema == pa.schema(
             [
                 schema.field(f)