Add redshift spectrum tests for unsigned integers.

Author: igorborgest

testing/test_awswrangler/test_data_lake.py

@@ -1369,7 +1369,7 @@ def test_copy_replacing_filename(bucket):
     wr.s3.delete_objects(path=path2)
 
 
-def test_unsigned_parquet(bucket, database):
+def test_unsigned_parquet(bucket, database, external_schema):
     path = f"s3://{bucket}/test_unsigned_parquet/"
     table = "test_unsigned_parquet"
     wr.s3.delete_objects(path=path)
@@ -1391,6 +1391,11 @@ def test_unsigned_parquet(bucket, database):
     assert df.c0.sum() == (2 ** 8) - 1
     assert df.c1.sum() == (2 ** 16) - 1
     assert df.c2.sum() == (2 ** 32) - 1
+    engine = wr.catalog.get_engine("aws-data-wrangler-redshift")
+    df = wr.db.read_sql_table(con=engine, table=table, schema=external_schema)
+    assert df.c0.sum() == (2 ** 8) - 1
+    assert df.c1.sum() == (2 ** 16) - 1
+    assert df.c2.sum() == (2 ** 32) - 1
 
     df = pd.DataFrame({"c0": [0, 0, (2 ** 64) - 1]})
     df["c0"] = df.c0.astype("uint64")